[dpdk-dev] [PATCH v5 4/5] doc: add EFD library section in Programmers guide

Pablo de Lara pablo.de.lara.guarch at intel.com
Mon Jan 16 10:43:23 CET 2017


Signed-off-by: Sameh Gobriel <sameh.gobriel at intel.com>
Acked-by: Christian Maciocco <christian.maciocco at intel.com>
---
 MAINTAINERS                            |    1 +
 doc/guides/prog_guide/efd_lib.rst      |  440 +++++++++++
 doc/guides/prog_guide/img/efd_i1.svg   |  130 ++++
 doc/guides/prog_guide/img/efd_i10.svg  |  384 ++++++++++
 doc/guides/prog_guide/img/efd_i11.svg  |  319 ++++++++
 doc/guides/prog_guide/img/efd_i12.svg  | 1008 +++++++++++++++++++++++++
 doc/guides/prog_guide/img/efd_i2.svg   |  280 +++++++
 doc/guides/prog_guide/img/efd_i3.svg   |  634 ++++++++++++++++
 doc/guides/prog_guide/img/efd_i4.svg   |  203 ++++++
 doc/guides/prog_guide/img/efd_i5.svg   |  183 +++++
 doc/guides/prog_guide/img/efd_i6.svg   | 1254 ++++++++++++++++++++++++++++++++
 doc/guides/prog_guide/img/efd_i7.svg   |  790 ++++++++++++++++++++
 doc/guides/prog_guide/img/efd_i8.svg   |  182 +++++
 doc/guides/prog_guide/img/efd_i9.svg   |  390 ++++++++++
 doc/guides/prog_guide/index.rst        |   23 +
 doc/guides/rel_notes/release_17_02.rst |    3 +
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 create mode 100644 doc/guides/prog_guide/img/efd_i1.svg
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diff --git a/MAINTAINERS b/MAINTAINERS
index b124f6e..66e9466 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -532,6 +532,7 @@ EFD
 M: Byron Marohn <byron.marohn at intel.com>
 M: Pablo de Lara Guarch <pablo.de.lara.guarch at intel.com>
 F: lib/librte_efd/
+F: doc/guides/prog_guide/efd_lib.rst
 F: app/test/test_efd*
 F: examples/flow_distributor/
 
diff --git a/doc/guides/prog_guide/efd_lib.rst b/doc/guides/prog_guide/efd_lib.rst
new file mode 100644
index 0000000..5b8e4e3
--- /dev/null
+++ b/doc/guides/prog_guide/efd_lib.rst
@@ -0,0 +1,440 @@
+..  BSD LICENSE
+    Copyright(c) 2016-2017 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+.. _Efd_Library:
+
+Elastic Flow Distributor Library
+================================
+
+Introduction
+------------
+
+In Data Centers today, clustering and scheduling of distributed workloads
+is a very common task. Many workloads require a deterministic
+partitioning of a flat key space among a cluster of machines. When a
+packet enters the cluster, the ingress node will direct the packet to
+its handling node. For example, data-centers with disaggregated storage
+use storage metadata tables to forward I/O requests to the correct back end
+storage cluster, stateful packet inspection will use match incoming
+flows to signatures in flow tables to send incoming packets to their
+intended deep packet inspection (DPI) devices, and so on.
+
+EFD is a distributor library that uses perfect hashing to determine a
+target/value for a given incoming flow key. It has the following
+advantages: first, because it uses perfect hashing it does not store the
+key itself and hence lookup performance is not dependent on the key
+size. Second, the target/value can be any arbitrary value hence the
+system designer and/or operator can better optimize service rates and
+inter-cluster network traffic locating. Third, since the storage
+requirement is much smaller than a hash-based flow table (i.e. better
+fit for CPU cache), EFD can scale to millions of flow keys. Finally,
+with the current optimized library implementation, performance is fully
+scalable with any number of CPU cores.
+
+Flow Based Distribution
+-----------------------
+
+Computation Based Schemes
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Flow distribution and/or load balancing can be simply done using a
+stateless computation, for instance using round-robin or a simple
+computation based on the flow key as an input. For example, a hash
+function can be used to direct a certain flow to a target based on
+the flow key (e.g. ``h(key) mod n``) where h(key) is the hash value of the
+flow key and n is the number of possible targets.
+
+.. _figure_efd1:
+
+.. figure:: img/efd_i1.*
+
+  Load Balancing Using Front End Node
+
+In this scheme (:numref:`figure_efd1`), the front end server/distributor/load balancer
+extracts the flow key from the input packet and applies a computation to determine where
+this flow should be directed. Intuitively, this scheme is very simple
+and requires no state to be kept at the front end node, and hence,
+storage requirements are minimum.
+
+.. _figure_efd2:
+
+.. figure:: img/efd_i2.*
+
+  Consistent Hashing
+
+A widely used flow distributor that belongs to the same category of
+computation-based schemes is ``consistent hashing``, shown in :numref:`figure_efd2`.
+Target destinations (shown in red) are hashed into the same space as the flow
+keys (shown in blue), and keys are mapped to the nearest target in a clockwise
+fashion. Dynamically adding and removing targets with consistent hashing
+requires only K/n keys to be remapped on average, where K is the number of
+keys, and n is the number of targets. In contrast, in a traditional hash-based
+scheme, a change in the number of targets causes nearly all keys to be
+remapped.
+
+Although computation-based schemes are simple and need very little
+storage requirement, they suffer from the drawback that the system
+designer/operator can’t fully control the target to assign a specific
+key, as this is dictated by the hash function.
+Deterministically co-locating of keys together (for example, to minimize
+inter-server traffic or to optimize for network traffic conditions,
+target load, etc.) is simply not possible.
+
+Flow-Table Based Schemes
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+When using a Flow-Table based scheme to handle flow distribution/load
+balancing, in contrast with computation-based schemes, the system designer
+has the flexibility of assigning a given flow to any given
+target. The flow table (e.g. DPDK RTE Hash Library) will simply store
+both the flow key and the target value.
+
+.. _figure_efd3:
+
+.. figure:: img/efd_i3.*
+
+  Table Based Flow Distribution
+
+As shown in :numref:`figure_efd3`, when doing a lookup, the flow-table
+is indexed with the hash of the flow key and the keys (more than one is possible,
+because of hash collision) stored in this index and corresponding values
+are retrieved. The retrieved key(s) is matched with the input flow key
+and if there is a match the value (target id) is returned.
+
+The drawback of using a hash table for flow distribution/load balancing
+is the storage requirement, since the flow table need to store keys,
+signatures and target values. This doesn't allow this scheme to scale to
+millions of flow keys. Large tables will usually not fit in
+the CPU cache, and hence, the lookup performance is degraded because of
+the latency to access the main memory.
+
+EFD Based Scheme
+~~~~~~~~~~~~~~~~
+
+EFD combines the advantages of both flow-table based and computation-based
+schemes. It doesn't require the large storage necessary for
+flow-table based schemes (because EFD doesn't store the key as explained
+below), and it supports any arbitrary value for any given key.
+
+.. _figure_efd4:
+
+.. figure:: img/efd_i4.*
+
+  Searching for Perfect Hash Function
+
+The basic idea of EFD is when a given key is to be inserted, a family of
+hash functions is searched until the correct hash function that maps the
+input key to the correct value is found, as shown in :numref:`figure_efd4`.
+However, rather than explicitly storing all keys and their associated values,
+EFD stores only indices of hash functions that map keys to values, and
+thereby consumes much less space than conventional flow-based tables.
+The lookup operation is very simple, similar to a computational-based
+scheme: given an input key the lookup operation is reduced to hashing
+that key with the correct hash function.
+
+.. _figure_efd5:
+
+.. figure:: img/efd_i5.*
+
+  Divide and Conquer for Millions of Keys
+
+Intuitively, finding a hash function that maps each of a large number
+(millions) of input keys to the correct output value is effectively
+impossible, as a result EFD, as shown in :numref:`figure_efd5`,
+breaks the problem into smaller pieces (divide and conquer).
+EFD divides the entire input key set into many small groups.
+Each group consists of approximately 20-28 keys (a configurable parameter
+for the library), then, for each small group, a brute force search to find
+a hash function that produces the correct outputs for each key in the group.
+
+It should be mentioned that, since the online lookup table for EFD
+doesn't store the key itself, the size of the EFD table is independent
+of the key size and hence EFD lookup performance which is almost
+constant irrespective of the length of the key which is a highly
+desirable feature especially for longer keys.
+
+In summary, EFD is a set separation data structure that supports millions of
+keys. It is used to distribute a given key to an intended target. By itself
+EFD is not a FIB data structure with an exact match the input flow key.
+
+.. _Efd_example:
+
+Example of EFD Library Usage
+----------------------------
+
+EFD can be used along the data path of many network functions and middleboxes.
+As previously mentioned, it can used as an index table for
+<key,value> pairs, meta-data for objects, a flow-level load balancer, etc.
+:numref:`figure_efd6` shows an example of using EFD as a flow-level load
+balancer, where flows are received at a front end server before being forwarded
+to the target back end server for processing. The system designer would
+deterministically co-locate flows together in order to minimize cross-server
+interaction.
+(For example, flows requesting certain webpage objects are co-located
+together, to minimize forwarding of common objects across servers).
+
+.. _figure_efd6:
+
+.. figure:: img/efd_i6.*
+
+  EFD as a Flow-Level Load Balancer
+
+As shown in :numref:`figure_efd6`, the front end server will have an EFD table that
+stores for each group what is the perfect hash index that satisfies the
+correct output. Because the table size is small and fits in cache (since
+keys are not stored), it sustains a large number of flows (N*X, where N
+is the maximum number of flows served by each back end server of the X
+possible targets).
+
+With an input flow key, the group id is computed (for example, using
+last few bits of CRC hash) and then the EFD table is indexed with the
+group id to retrieve the corresponding hash index to use. Once the index
+is retrieved the key is hashed using this hash function and the result
+will be the intended correct target where this flow is supposed to be
+processed.
+
+It should be noted that as a result of EFD not matching the exact key but
+rather distributing the flows to a target back end node based on the
+perfect hash index, a key that has not been inserted before
+will be distributed to a valid target. Hence, a local table which stores
+the flows served at each node is used and is
+exact matched with the input key to rule out new never seen before
+flows.
+
+.. _Efd_api:
+
+Library API Overview
+--------------------
+
+The EFD library API is created with a very similar semantics of a
+hash-index or a flow table. The application creates an EFD table for a
+given maximum number of flows, a function is called to insert a flow key
+with a specific target value, and another function is used to retrieve
+target values for a given individual flow key or a bulk of keys.
+
+EFD Table Create
+~~~~~~~~~~~~~~~~
+
+The function ``rte_efd_create()`` is used to create and return a pointer
+to an EFD table that is sized to hold up to num_flows key.
+The online version of the EFD table (the one that does
+not store the keys and is used for lookups) will be allocated and
+created in the last level cache (LLC) of the socket defined by the
+online_socket_bitmask, while the offline EFD table (the one that
+stores the keys and is used for key inserts and for computing the
+perfect hashing) is allocated and created in the LLC of the socket
+defined by offline_socket_bitmask. It should be noted, that for
+highest performance the socket id should match that where the thread is
+running, i.e. the online EFD lookup table should be created on the same
+socket as where the lookup thread is running.
+
+EFD Insert and Update
+~~~~~~~~~~~~~~~~~~~~~
+
+The EFD function to insert a key or update a key to a new value is
+``rte_efd_update()``. This function will update an existing key to
+a new value (target) if the key has already been inserted
+before, or will insert the <key,value> pair if this key has not been inserted
+before. It will return 0 upon success. It will return
+``EFD_UPDATE_WARN_GROUP_FULL (1)`` if the operation is insert, and the
+last available space in the key's group was just used. It will return
+``EFD_UPDATE_FAILED (2)`` when the insertion or update has failed (either it
+failed to find a suitable perfect hash or the group was full). The function
+will return ``EFD_UPDATE_NO_CHANGE (3)`` if there is no change to the EFD
+table (i.e, same value already exists).
+
+EFD Lookup
+~~~~~~~~~~
+
+To lookup a certain key in an EFD table, the function ``rte_efd_lookup()``
+is used to return the value associated with single key.
+As previously mentioned, if the key has been inserted, the correct value
+inserted is returned, if the key has not been inserted before,
+a ‘random’ value (based on hashing of the key) is returned.
+For better performance and to decrease the overhead of
+function calls per key, it is always recommended to use a bulk lookup
+function (simultaneous lookup of multiple keys) instead of a single key
+lookup function. ``rte_efd_lookup_bulk()`` is the bulk lookup function,
+that looks up num_keys simultaneously stored in the key_list and the
+corresponding return values will be returned in the value_list.
+
+EFD Delete
+~~~~~~~~~~
+
+To delete a certain key in an EFD table, the function
+``rte_efd_delete()`` can be used. The function returns zero upon success
+when the key has been found and deleted. Socket_id is the parameter to
+use to lookup the existing value, which is ideally the caller's socket id.
+The previous value associated with this key will be returned
+in the prev_value argument.
+
+.. _Efd_internals:
+
+Library Internals
+-----------------
+
+This section provides the brief high-level idea and an overview
+of the library internals to accompany the RFC. The intent of this
+section is to explain to readers the high-level implementation of
+insert, lookup and group rebalancing in the EFD library.
+
+Insert Function Internals
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+As previously mentioned the EFD divides the whole set of keys into
+groups of a manageable size (e.g. 28 keys) and then searches for the
+perfect hash that satisfies the intended target value for each key. EFD
+stores two version of the <key,value> table:
+
+-  Offline Version (in memory): Only used for the insertion/update
+   operation, which is less frequent than the lookup operation. In the
+   offline version the exact keys for each group is stored. When a new
+   key is added, the hash function is updated that will satisfy the
+   value for the new key together with the all old keys already inserted
+   in this group.
+
+-  Online Version (in cache): Used for the frequent lookup operation. In
+   the online version, as previously mentioned, the keys are not stored
+   but rather only the hash index for each group.
+
+.. _figure_efd7:
+
+.. figure:: img/efd_i7.*
+
+  Group Assignment
+
+:numref:`figure_efd7` depicts the group assignment for 7 flow keys as an example.
+Given a flow key, a hash function (in our implementation CRC hash) is
+used to get the group id. As shown in the figure, the groups can be
+unbalanced. (We highlight group rebalancing further below).
+
+.. _figure_efd8:
+
+.. figure:: img/efd_i8.*
+
+  Perfect Hash Search - Assigned Keys & Target Value
+
+Focusing on one group that has four keys, :numref:`figure_efd8` depicts the search
+algorithm to find the perfect hash function. Assuming that the target
+value bit for the keys is as shown in the figure, then the online EFD
+table will store a 16 bit hash index and 16 bit lookup table per group
+per value bit.
+
+.. _figure_efd9:
+
+.. figure:: img/efd_i9.*
+
+  Perfect Hash Search - Satisfy Target Values
+
+For a given keyX, a hash function ``(h(keyX, seed1) + index * h(keyX, seed2))``
+is used to point to certain bit index in the 16bit lookup_table value,
+as shown in :numref:`figure_efd9`.
+The insert function will brute force search for all possible values for the
+hash index until a non conflicting lookup_table is found.
+
+.. _figure_efd10:
+
+.. figure:: img/efd_i10.*
+
+  Finding Hash Index for Conflict Free lookup_table
+
+For example, since both key3 and key7 have a target bit value of 1, it
+is okay if the hash function of both keys point to the same bit in the
+lookup table. A conflict will occur if a hash index is used that maps
+both Key4 and Key7 to the same index in the lookup_table,
+as shown in :numref:`figure_efd10`, since their target value bit are not the same.
+Once a hash index is found that produces a lookup_table with no
+contradictions, this index is stored for this group. This procedure is
+repeated for each bit of target value.
+
+Lookup Function Internals
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The design principle of EFD is that lookups are much more frequent than
+inserts, and hence, EFD's design optimizes for the lookups which are
+faster and much simpler than the slower insert procedure (inserts are
+slow, because of perfect hash search as previously discussed).
+
+.. _figure_efd11:
+
+.. figure:: img/efd_i11.*
+
+  EFD Lookup Operation
+
+:numref:`figure_efd11` depicts the lookup operation for EFD. Given an input key,
+the group id is computed (using CRC hash) and then the hash index for this
+group is retrieved from the EFD table. Using the retrieved hash index,
+the hash function ``h(key, seed1) + index *h(key, seed2)`` is used which will
+result in an index in the lookup_table, the bit corresponding to this
+index will be the target value bit. This procedure is repeated for each
+bit of the target value.
+
+Group Rebalancing Function Internals
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When discussing EFD inserts and lookups, the discussion is simplified by
+assuming that a group id is simply a result of hash function. However,
+since hashing in general is not perfect and will not always produce a
+uniform output, this simplified assumption will lead to unbalanced
+groups, i.e., some group will have more keys than other groups.
+Typically, and to minimize insert time with an increasing number of keys,
+it is preferable that all groups will have a balanced number of keys, so
+the brute force search for the perfect hash terminates with a valid hash
+index. In order to achieve this target, groups are rebalanced during
+runtime inserts, and keys are moved around from a busy group to a less
+crowded group as the more keys are inserted.
+
+.. _figure_efd12:
+
+.. figure:: img/efd_i12.*
+
+  Runtime Group Rebalancing
+
+:numref:`figure_efd12` depicts the high level idea of group rebalancing, given an
+input key the hash result is split into two parts a chunk id and 8-bit
+bin id. A chunk contains 64 different groups and 256 bins (i.e. for any
+given bin it can map to 4 distinct groups). When a key is inserted, the
+bin id is computed, for example in :numref:`figure_efd12` bin_id=2,
+and since each bin can be mapped to one of four different groups (2 bit storage),
+the four possible mappings are evaluated and the one that will result in a
+balanced key distribution across these four is selected the mapping result
+is stored in these two bits.
+
+
+.. _Efd_references:
+
+References
+-----------
+
+1- EFD is based on collaborative research work between Intel and
+Carnegie Mellon University (CMU), interested readers can refer to the paper
+“Scaling Up Clustered Network Appliances with ScaleBricks;” Dong Zhou et al.
+at SIGCOMM 2015 (`http://conferences.sigcomm.org/sigcomm/2015/pdf/papers/p241.pdf`)
+for more information.
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diff --git a/doc/guides/prog_guide/img/efd_i10.svg b/doc/guides/prog_guide/img/efd_i10.svg
new file mode 100644
index 0000000..d26ec61
--- /dev/null
+++ b/doc/guides/prog_guide/img/efd_i10.svg
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+			<path d="M0 291.88 C0 290 1.52 288.48 3.41 288.48 L68.51 288.48 C70.4 288.48 71.91 290 71.91 291.88 L71.91 305.46 C71.91
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+		</g>
+		<g id="shape6-3" v:mID="6" v:groupContext="shape" transform="translate(36.0674,-256.878)">
+			<title>Sheet.6</title>
+			<path d="M0 291.88 C0 290 1.52 288.48 3.41 288.48 L68.51 288.48 C70.4 288.48 71.91 290 71.91 291.88 L71.91 305.46 C71.91
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+		</g>
+		<g id="shape7-5" v:mID="7" v:groupContext="shape" transform="translate(61.6502,-258.089)">
+			<title>Sheet.7</title>
+			<desc>Key</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="13.7891" cy="301.658" width="27.58" height="14.3829"/>
+			<path d="M27.58 294.47 L0 294.47 L0 308.85 L27.58 308.85 L27.58 294.47" class="st3"/>
+			<text x="3.46" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Key</text>		</g>
+		<g id="shape8-9" v:mID="8" v:groupContext="shape" transform="translate(51.9748,-236.328)">
+			<title>Sheet.8</title>
+			<path d="M0 298.54 L9.81 298.54 L9.81 288.24 L29.44 288.24 L29.44 298.54 L39.26 298.54 L19.63 308.85 L0 298.54 Z"
+					class="st5"/>
+		</g>
+		<g id="shape9-11" v:mID="9" v:groupContext="shape" transform="translate(36.0674,-215.298)">
+			<title>Sheet.9</title>
+			<path d="M0 291.77 C0 289.89 1.54 288.36 3.42 288.36 L68.49 288.36 C70.38 288.36 71.91 289.89 71.91 291.77 L71.91 305.43
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+					class="st1"/>
+		</g>
+		<g id="shape10-13" v:mID="10" v:groupContext="shape" transform="translate(36.0674,-215.298)">
+			<title>Sheet.10</title>
+			<path d="M0 291.77 C0 289.89 1.54 288.36 3.42 288.36 L68.49 288.36 C70.38 288.36 71.91 289.89 71.91 291.77 L71.91 305.43
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+					class="st2"/>
+		</g>
+		<g id="shape11-15" v:mID="11" v:groupContext="shape" transform="translate(58.8889,-216.57)">
+			<title>Sheet.11</title>
+			<desc>hash</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="16.8573" cy="301.658" width="33.72" height="14.3829"/>
+			<path d="M33.71 294.47 L0 294.47 L0 308.85 L33.71 308.85 L33.71 294.47" class="st3"/>
+			<text x="3.86" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>hash</text>		</g>
+		<g id="shape12-19" v:mID="12" v:groupContext="shape" transform="translate(27.3033,-174.437)">
+			<title>Sheet.12</title>
+			<path d="M0 292.58 C0 290.78 1.46 289.32 3.26 289.32 L87.15 289.32 C88.95 289.32 90.4 290.78 90.4 292.58 L90.4 305.6
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+		</g>
+		<g id="shape13-21" v:mID="13" v:groupContext="shape" transform="translate(27.3033,-174.437)">
+			<title>Sheet.13</title>
+			<path d="M0 292.58 C0 290.78 1.46 289.32 3.26 289.32 L87.15 289.32 C88.95 289.32 90.4 290.78 90.4 292.58 L90.4 305.6
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+		</g>
+		<g id="shape14-23" v:mID="14" v:groupContext="shape" transform="translate(36.0515,-175.256)">
+			<title>Sheet.14</title>
+			<desc>0x0102ABCD</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="43.6644" cy="301.658" width="87.33" height="14.3829"/>
+			<path d="M87.33 294.47 L0 294.47 L0 308.85 L87.33 308.85 L87.33 294.47" class="st3"/>
+			<text x="7.36" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>0x0102ABCD</text>		</g>
+		<g id="shape15-27" v:mID="15" v:groupContext="shape" transform="translate(51.9748,-194.029)">
+			<title>Sheet.15</title>
+			<path d="M0 298.48 L9.81 298.48 L9.81 288.12 L29.44 288.12 L29.44 298.48 L39.26 298.48 L19.63 308.85 L0 298.48 Z"
+					class="st5"/>
+		</g>
+		<g id="shape16-29" v:mID="16" v:groupContext="shape" transform="translate(48.9133,-159.818)">
+			<title>Sheet.16</title>
+			<path d="M26.41 296.87 C26.41 300.18 25.97 302.86 25.41 302.86 L14.21 302.86 C13.66 302.86 13.21 305.55 13.21 308.85
+						 C13.21 305.55 12.76 302.86 12.21 302.86 L1.01 302.86 C0.45 302.86 0 300.18 0 296.87" class="st6"/>
+		</g>
+		<g id="shape17-32" v:mID="17" v:groupContext="shape" transform="translate(19.0195,-19.0195)">
+			<title>Sheet.17</title>
+			<path d="M0 196.93 L0 308.85 L145.15 308.85 L145.15 196.93 L0 196.93 L0 196.93 Z" class="st1"/>
+		</g>
+		<g id="shape18-34" v:mID="18" v:groupContext="shape" transform="translate(19.0195,-19.0195)">
+			<title>Sheet.18</title>
+			<path d="M0 196.93 L145.15 196.93 L145.15 308.85 L0 308.85 L0 196.93" class="st7"/>
+		</g>
+		<g id="shape19-37" v:mID="19" v:groupContext="shape" transform="translate(28.2638,-70.6655)">
+			<title>Sheet.19</title>
+			<path d="M0 280.69 C0 277.58 2.53 275.06 5.64 275.06 L124.14 275.06 C127.26 275.06 129.78 277.58 129.78 280.69 L129.78
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+		</g>
+		<g id="shape20-39" v:mID="20" v:groupContext="shape" transform="translate(28.2638,-70.6655)">
+			<title>Sheet.20</title>
+			<path d="M0 280.69 C0 277.58 2.53 275.06 5.64 275.06 L124.14 275.06 C127.26 275.06 129.78 277.58 129.78 280.69 L129.78
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+		</g>
+		<g id="shape21-41" v:mID="21" v:groupContext="shape" transform="translate(57.4514,-85.7513)">
+			<title>Sheet.21</title>
+			<desc>hash_index =</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="45.0133" cy="301.658" width="90.03" height="14.3829"/>
+			<path d="M90.03 294.47 L0 294.47 L0 308.85 L90.03 308.85 L90.03 294.47" class="st3"/>
+			<text x="9.2" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>hash_index =  </text>		</g>
+		<g id="shape22-45" v:mID="22" v:groupContext="shape" transform="translate(76.3001,-71.3719)">
+			<title>Sheet.22</title>
+			<desc>38123</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="21.0762" cy="301.658" width="42.16" height="14.3829"/>
+			<path d="M42.15 294.47 L0 294.47 L0 308.85 L42.15 308.85 L42.15 294.47" class="st3"/>
+			<text x="4.42" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>38123</text>		</g>
+		<g id="shape23-49" v:mID="23" v:groupContext="shape" transform="translate(28.2638,-27.048)">
+			<title>Sheet.23</title>
+			<path d="M0 280.69 C0 277.59 2.54 275.06 5.64 275.06 L124.14 275.06 C127.26 275.06 129.78 277.59 129.78 280.69 L129.78
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+						 Z" class="st1"/>
+		</g>
+		<g id="shape24-51" v:mID="24" v:groupContext="shape" transform="translate(28.2638,-27.048)">
+			<title>Sheet.24</title>
+			<path d="M0 280.69 C0 277.59 2.54 275.06 5.64 275.06 L124.14 275.06 C127.26 275.06 129.78 277.59 129.78 280.69 L129.78
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+						 Z" class="st2"/>
+		</g>
+		<g id="shape25-53" v:mID="25" v:groupContext="shape" transform="translate(54.0924,-41.564)">
+			<title>Sheet.25</title>
+			<desc>lookup_table =</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="46.931" cy="301.658" width="93.87" height="14.3829"/>
+			<path d="M93.86 294.47 L0 294.47 L0 308.85 L93.86 308.85 L93.86 294.47" class="st3"/>
+			<text x="7.79" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>lookup_table =</text>		</g>
+		<g id="shape26-57" v:mID="26" v:groupContext="shape" transform="translate(28.0195,-28.5506)">
+			<title>Sheet.26</title>
+			<desc>0110 1100 0101 1101</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="64.89" cy="302.233" width="129.79" height="13.2327"/>
+			<path d="M129.78 295.62 L0 295.62 L0 308.85 L129.78 308.85 L129.78 295.62" class="st3"/>
+			<text x="11.25" y="305.54" class="st8" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>0110 11<tspan
+						class="st9">0</tspan>0 0101 1101</text>		</g>
+		<g id="shape27-62" v:mID="27" v:groupContext="shape" transform="translate(26.2461,-113.863)">
+			<title>Sheet.27</title>
+			<desc>Group ID: 0x0102</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="48.6286" cy="302.881" width="97.26" height="11.9384"/>
+			<path d="M97.26 296.91 L0 296.91 L0 308.85 L97.26 308.85 L97.26 296.91" class="st3"/>
+			<text x="7.73" y="305.86" class="st10" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Group ID: 0x0102</text>		</g>
+		<g id="shape28-66" v:mID="28" v:groupContext="shape" transform="translate(42.3703,-135.313)">
+			<title>Sheet.28</title>
+			<path d="M0 298.48 L9.84 298.48 L9.84 288.12 L29.53 288.12 L29.53 298.48 L39.38 298.48 L19.69 308.85 L0 298.48 Z"
+					class="st5"/>
+		</g>
+		<g id="shape29-68" v:mID="29" v:groupContext="shape" transform="translate(117.645,-244.476)">
+			<title>Sheet.29</title>
+			<path d="M0 274.07 L22.75 274.07 L22.75 262.48 L45.5 285.66 L22.75 308.85 L22.75 297.26 L0 297.26 L0 274.07 Z"
+					class="st5"/>
+		</g>
+		<g id="shape30-70" v:mID="30" v:groupContext="shape" transform="translate(169.209,-251.966)">
+			<title>Sheet.30</title>
+			<path d="M0 283.69 C0 280.91 2.27 278.65 5.04 278.65 L111.77 278.65 C114.56 278.65 116.81 280.91 116.81 283.69 L116.81
+						 303.82 C116.81 306.6 114.56 308.85 111.77 308.85 L5.04 308.85 C2.27 308.85 0 306.6 0 303.82 L0 283.69 Z"
+					class="st1"/>
+		</g>
+		<g id="shape31-72" v:mID="31" v:groupContext="shape" transform="translate(169.209,-251.966)">
+			<title>Sheet.31</title>
+			<path d="M0 283.69 C0 280.91 2.27 278.65 5.04 278.65 L111.77 278.65 C114.56 278.65 116.81 280.91 116.81 283.69 L116.81
+						 303.82 C116.81 306.6 114.56 308.85 111.77 308.85 L5.04 308.85 C2.27 308.85 0 306.6 0 303.82 L0 283.69 Z"
+					class="st2"/>
+		</g>
+		<g id="shape35-74" v:mID="35" v:groupContext="shape" transform="translate(291.966,-244.476)">
+			<title>Sheet.35</title>
+			<path d="M0 274.07 L22.69 274.07 L22.69 262.48 L45.38 285.66 L22.69 308.85 L22.69 297.26 L0 297.26 L0 274.07 Z"
+					class="st5"/>
+		</g>
+		<g id="shape36-76" v:mID="36" v:groupContext="shape" transform="translate(343.17,-254.482)">
+			<title>Sheet.36</title>
+			<path d="M0 288.09 C0 285.8 1.88 283.93 4.17 283.93 L109.18 283.93 C111.47 283.93 113.33 285.8 113.33 288.09 L113.33
+						 304.7 C113.33 306.99 111.47 308.85 109.18 308.85 L4.17 308.85 C1.88 308.85 0 306.99 0 304.7 L0 288.09 Z"
+					class="st1"/>
+		</g>
+		<g id="shape37-78" v:mID="37" v:groupContext="shape" transform="translate(343.17,-254.482)">
+			<title>Sheet.37</title>
+			<path d="M0 288.09 C0 285.8 1.88 283.93 4.17 283.93 L109.18 283.93 C111.47 283.93 113.33 285.8 113.33 288.09 L113.33
+						 304.7 C113.33 306.99 111.47 308.85 109.18 308.85 L4.17 308.85 C1.88 308.85 0 306.99 0 304.7 L0 288.09 Z"
+					class="st2"/>
+		</g>
+		<g id="shape38-80" v:mID="38" v:groupContext="shape" transform="translate(368.337,-257.958)">
+			<title>Sheet.38</title>
+			<desc>Position = 6</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="38.1131" cy="301.658" width="76.23" height="14.3829"/>
+			<path d="M76.23 294.47 L0 294.47 L0 308.85 L76.23 308.85 L76.23 294.47" class="st3"/>
+			<text x="6.64" y="305.25" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Position = 6</text>		</g>
+		<g id="shape39-84" v:mID="39" v:groupContext="shape" transform="translate(158.044,-86.5202)">
+			<title>Sheet.39</title>
+			<path d="M0 308.85 L69.59 308.85 C70.16 308.85 70.62 308.39 70.62 307.83 L70.62 148.5 L68.57 148.5 L68.57 307.83 L69.59
+						 306.81 L0 306.81 L0 308.85 ZM72.66 149.52 L69.59 143.4 L66.53 149.52 L72.66 149.52 Z" class="st11"/>
+		</g>
+		<g id="shape41-86" v:mID="41" v:groupContext="shape" transform="translate(335.112,-199.647)">
+			<title>Sheet.41</title>
+			<desc>Apply the equation</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="71.2648" cy="300.436" width="142.53" height="16.8275"/>
+			<path d="M142.53 292.02 L0 292.02 L0 308.85 L142.53 308.85 L142.53 292.02" class="st3"/>
+			<text x="13.19" y="304.64" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Apply the equation  </text>		</g>
+		<g id="shape42-90" v:mID="42" v:groupContext="shape" transform="translate(341.115,-182.871)">
+			<title>Sheet.42</title>
+			<desc>to retrieve the bit</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="64.5256" cy="300.436" width="129.06" height="16.8275"/>
+			<path d="M129.05 292.02 L0 292.02 L0 308.85 L129.05 308.85 L129.05 292.02" class="st3"/>
+			<text x="12.31" y="304.64" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>to retrieve the bit  </text>		</g>
+		<g id="shape43-94" v:mID="43" v:groupContext="shape" transform="translate(349.999,-166.095)">
+			<title>Sheet.43</title>
+			<desc>position in the</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="54.2285" cy="300.436" width="108.46" height="16.8275"/>
+			<path d="M108.46 292.02 L0 292.02 L0 308.85 L108.46 308.85 L108.46 292.02" class="st3"/>
+			<text x="10.97" y="304.64" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>position in the  </text>		</g>
+		<g id="shape44-98" v:mID="44" v:groupContext="shape" transform="translate(353.361,-149.319)">
+			<title>Sheet.44</title>
+			<desc>lookup_table</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="47.9619" cy="300.436" width="95.93" height="16.8275"/>
+			<path d="M95.92 292.02 L0 292.02 L0 308.85 L95.92 308.85 L95.92 292.02" class="st3"/>
+			<text x="8.21" y="304.64" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>lookup_table</text>		</g>
+		<g id="shape47-102" v:mID="47" v:groupContext="shape" transform="translate(115.17,255.2) rotate(-90)">
+			<title>1-D word balloon</title>
+			<desc>Retrieve the value “0' from the specified location in the loo...</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+				<v:ud v:nameU="Scale" v:val="VT0(1):26"/>
+				<v:ud v:nameU="AntiScale" v:val="VT0(1):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="29.2016" cy="218.85" width="180" height="58.4032" transform="rotate(90)"/>
+			<path d="M0 308.85 L58.4 308.85 L58.4 128.85 L0 128.85 L0 204.67 L-11.87 38.85 L-7.09 233.03 L0 233.03 L0 308.85 Z"
+					class="st13"/>
+			<text x="136.98" y="-41.8" transform="rotate(90)" class="st14" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Retrieve the value “0' from <tspan
+						x="134.41" dy="1.2em" class="st15">the specified location in the </tspan><tspan x="181.1" dy="1.2em"
+						class="st15">lookup table</tspan></text>		</g>
+		<g id="shape48-107" v:mID="48" v:groupContext="shape" transform="translate(169.209,-251.966)">
+			<title>Sheet.48</title>
+			<desc>F(Key, hash_index = 38123</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="54.2285" cy="295.35" width="108.46" height="27"/>
+			<rect x="0" y="281.85" width="108.457" height="27" class="st16"/>
+			<text x="5.86" y="291.75" class="st17" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>F(Key, hash_index = <tspan
+						x="39.02" dy="1.2em" class="st15">38123</tspan></text>		</g>
+		<g id="shape49-111" v:mID="49" v:groupContext="shape" transform="translate(553.962,99) rotate(90)">
+			<title>1-D word balloon.49</title>
+			<desc>Apply the equation to retrieve the bit position in the lookup...</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+				<v:ud v:nameU="Scale" v:val="VT0(1):26"/>
+				<v:ud v:nameU="AntiScale" v:val="VT0(1):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="29.2016" cy="218.85" width="180" height="58.4032" transform="rotate(-90)"/>
+			<path d="M0 308.85 L58.4 308.85 L58.4 128.85 L0 128.85 L0 204.67 L-51.13 299.85 L0 233.03 L0 308.85 Z" class="st13"/>
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+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st4"/>
+		</g>
+		<g id="shape42-108" v:mID="42" v:groupContext="shape" transform="translate(230.508,-309.069)">
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+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape43-111" v:mID="43" v:groupContext="shape" transform="translate(233.39,-309.868)">
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+			<desc>0</desc>
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+			<desc>4</desc>
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+		<g id="shape45-119" v:mID="45" v:groupContext="shape" transform="translate(230.508,-292.413)">
+			<title>Sheet.45</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st7"/>
+		</g>
+		<g id="shape46-121" v:mID="46" v:groupContext="shape" transform="translate(230.508,-292.413)">
+			<title>Sheet.46</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape47-124" v:mID="47" v:groupContext="shape" transform="translate(233.39,-293.221)">
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+			<desc>1</desc>
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+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+		<g id="shape48-128" v:mID="48" v:groupContext="shape" transform="translate(230.508,-275.757)">
+			<title>Sheet.48</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st4"/>
+		</g>
+		<g id="shape49-130" v:mID="49" v:groupContext="shape" transform="translate(230.508,-275.757)">
+			<title>Sheet.49</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape50-133" v:mID="50" v:groupContext="shape" transform="translate(233.39,-276.574)">
+			<title>Sheet.50</title>
+			<desc>2</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>2</text>		</g>
+		<g id="shape51-137" v:mID="51" v:groupContext="shape" transform="translate(252.478,-276.574)">
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+			<desc>3</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+		<g id="shape52-141" v:mID="52" v:groupContext="shape" transform="translate(258.001,-276.574)">
+			<title>Sheet.52</title>
+			<desc>+1</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="8.11122" cy="373.835" width="16.23" height="11.9384"/>
+			<path d="M16.22 367.87 L0 367.87 L0 379.8 L16.22 379.8 L16.22 367.87" class="st2"/>
+			<text x="2.44" y="376.82" class="st14" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>+1</text>		</g>
+		<g id="shape53-145" v:mID="53" v:groupContext="shape" transform="translate(230.508,-259.7)">
+			<title>Sheet.53</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st7"/>
+		</g>
+		<g id="shape54-147" v:mID="54" v:groupContext="shape" transform="translate(230.508,-259.7)">
+			<title>Sheet.54</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape55-150" v:mID="55" v:groupContext="shape" transform="translate(233.39,-260.497)">
+			<title>Sheet.55</title>
+			<desc>3</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>3</text>		</g>
+		<g id="shape56-154" v:mID="56" v:groupContext="shape" transform="translate(230.508,-243.164)">
+			<title>Sheet.56</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st4"/>
+		</g>
+		<g id="shape57-156" v:mID="57" v:groupContext="shape" transform="translate(230.508,-243.164)">
+			<title>Sheet.57</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape58-159" v:mID="58" v:groupContext="shape" transform="translate(233.39,-244.053)">
+			<title>Sheet.58</title>
+			<desc>4</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>4</text>		</g>
+		<g id="shape59-163" v:mID="59" v:groupContext="shape" transform="translate(263.764,-244.053)">
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+			<desc>0</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st13" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>0</text>		</g>
+		<g id="shape60-167" v:mID="60" v:groupContext="shape" transform="translate(230.508,-227.107)">
+			<title>Sheet.60</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st7"/>
+		</g>
+		<g id="shape61-169" v:mID="61" v:groupContext="shape" transform="translate(230.508,-227.107)">
+			<title>Sheet.61</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape62-172" v:mID="62" v:groupContext="shape" transform="translate(233.39,-227.976)">
+			<title>Sheet.62</title>
+			<desc>5</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>5</text>		</g>
+		<g id="shape63-176" v:mID="63" v:groupContext="shape" transform="translate(230.508,-210.211)">
+			<title>Sheet.63</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st7"/>
+		</g>
+		<g id="shape64-178" v:mID="64" v:groupContext="shape" transform="translate(230.508,-210.211)">
+			<title>Sheet.64</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape65-181" v:mID="65" v:groupContext="shape" transform="translate(233.39,-211.085)">
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+			<desc>6</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>6</text>		</g>
+		<g id="shape66-185" v:mID="66" v:groupContext="shape" transform="translate(230.508,-193.794)">
+			<title>Sheet.66</title>
+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st4"/>
+		</g>
+		<g id="shape67-187" v:mID="67" v:groupContext="shape" transform="translate(230.508,-193.794)">
+			<title>Sheet.67</title>
+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape68-190" v:mID="68" v:groupContext="shape" transform="translate(233.39,-194.681)">
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+			<desc>7</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+		<g id="shape69-194" v:mID="69" v:groupContext="shape" transform="translate(263.764,-194.681)">
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+			<desc>2</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+		<g id="shape70-198" v:mID="70" v:groupContext="shape" transform="translate(230.508,-177.258)">
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+			<path d="M0 363.27 L0 379.8 L41.18 379.8 L41.18 363.27 L0 363.27 L0 363.27 Z" class="st7"/>
+		</g>
+		<g id="shape71-200" v:mID="71" v:groupContext="shape" transform="translate(230.508,-177.258)">
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+			<path d="M0 363.27 L41.18 363.27 L41.18 379.8 L0 379.8 L0 363.27" class="st5"/>
+		</g>
+		<g id="shape72-203" v:mID="72" v:groupContext="shape" transform="translate(233.39,-178.117)">
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+			<desc>8</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
+			<text x="2.01" y="376.82" class="st12" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>8</text>		</g>
+		<g id="shape73-207" v:mID="73" v:groupContext="shape" transform="translate(230.508,-160.602)">
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+			<path d="M0 363.15 L0 379.8 L41.18 379.8 L41.18 363.15 L0 363.15 L0 363.15 Z" class="st7"/>
+		</g>
+		<g id="shape74-209" v:mID="74" v:groupContext="shape" transform="translate(230.508,-160.602)">
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+			<path d="M0 363.15 L41.18 363.15 L41.18 379.8 L0 379.8 L0 363.15" class="st5"/>
+		</g>
+		<g id="shape75-212" v:mID="75" v:groupContext="shape" transform="translate(233.39,-161.505)">
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+			<desc>9</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+		<g id="shape85-243" v:mID="85" v:groupContext="shape" transform="translate(233.39,-111.64)">
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+		<g id="shape88-252" v:mID="88" v:groupContext="shape" transform="translate(233.39,-95.7375)">
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+			<path d="M0 314.02 L0 379.8 L41.18 379.8 L41.18 314.02 L0 314.02 L0 314.02 Z" class="st7"/>
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+		<g id="shape99-280" v:mID="99" v:groupContext="shape" transform="translate(349.371,-91.6514)">
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+			<desc>…</desc>
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+			<path d="M0 314.02 L0 379.8 L41.18 379.8 L41.18 314.02 L0 314.02 L0 314.02 Z" class="st7"/>
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+			<path d="M0 314.02 L41.18 314.02 L41.18 379.8 L0 379.8 L0 314.02" class="st5"/>
+		</g>
+		<g id="shape102-289" v:mID="102" v:groupContext="shape" transform="translate(472.925,-144.778)">
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+			<desc>5</desc>
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+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+			<path d="M0 314.02 L0 379.8 L41.18 379.8 L41.18 314.02 L0 314.02 L0 314.02 Z" class="st4"/>
+		</g>
+		<g id="shape104-295" v:mID="104" v:groupContext="shape" transform="translate(511.558,-113.749)">
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+			<path d="M0 314.02 L41.18 314.02 L41.18 379.8 L0 379.8 L0 314.02" class="st5"/>
+		</g>
+		<g id="shape105-298" v:mID="105" v:groupContext="shape" transform="translate(514.441,-164.138)">
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+			<desc>4</desc>
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+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+		<g id="shape106-302" v:mID="106" v:groupContext="shape" transform="translate(542.148,-164.138)">
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+			<desc>2</desc>
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+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+			<desc>4</desc>
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+			<v:textRect cx="4.77151" cy="373.835" width="9.55" height="11.9384"/>
+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+			<desc>10</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="7.95203" cy="373.835" width="15.91" height="11.9384"/>
+			<path d="M15.9 367.87 L0 367.87 L0 379.8 L15.9 379.8 L15.9 367.87" class="st2"/>
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+			<desc>1</desc>
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+			<path d="M9.54 367.87 L0 367.87 L0 379.8 L9.54 379.8 L9.54 367.87" class="st2"/>
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+			<desc>+4</desc>
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+			<path d="M0 314.02 L0 379.8 L41.18 379.8 L41.18 314.02 L0 314.02 L0 314.02 Z" class="st7"/>
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+			<path d="M0 314.02 L41.18 314.02 L41.18 379.8 L0 379.8 L0 314.02" class="st5"/>
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+		<g id="shape113-327" v:mID="113" v:groupContext="shape" transform="translate(555.203,-180.952)">
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+			<path d="M0 313.9 L0 379.8 L41.18 379.8 L41.18 313.9 L0 313.9 L0 313.9 Z" class="st4"/>
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new file mode 100644
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+		<g id="shape20-92" v:mID="20" v:groupContext="shape" transform="translate(62.705,-78.7174)">
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+			<desc>Target Hashed Value</desc>
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+		<g id="shape23-102" v:mID="23" v:groupContext="shape" transform="translate(60.4044,-138.342)">
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+			<desc>Keys</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<title>Sheet.24</title>
+			<path d="M0 215.12 L22.9 215.12" class="st16"/>
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diff --git a/doc/guides/prog_guide/img/efd_i3.svg b/doc/guides/prog_guide/img/efd_i3.svg
new file mode 100644
index 0000000..ae22903
--- /dev/null
+++ b/doc/guides/prog_guide/img/efd_i3.svg
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+			<desc>Packet Header</desc>
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+		<g id="shape8-25" v:mID="8" v:groupContext="shape" transform="translate(219.25,-320.169)">
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+			<desc>Key 2</desc>
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+		<g id="shape102-250" v:mID="102" v:groupContext="shape" transform="translate(293.5,-97.0847)">
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+		<g id="shape105-267" v:mID="105" v:groupContext="shape" transform="translate(54,-82.4597)">
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+		<g id="shape12-50" v:mID="12" v:groupContext="shape" transform="translate(434.251,-313.188)">
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+		<g id="shape15-65" v:mID="15" v:groupContext="shape" transform="translate(319.501,-277.188)">
+			<title>Rectangle.70</title>
+			<desc>Key x</desc>
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+		<g id="shape16-71" v:mID="16" v:groupContext="shape" transform="translate(353.251,-277.188)">
+			<title>Rectangle.71</title>
+			<desc>Action x</desc>
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+			<desc>Key y</desc>
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+			<desc>Key z</desc>
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+			<desc>Action N</desc>
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+		<g id="shape71-291" v:mID="71" v:groupContext="shape" transform="translate(684.44,239.627) rotate(90)">
+			<title>Sheet.71</title>
+			<path d="M0 424.56 L45 424.56" class="st24"/>
+		</g>
+		<g id="shape72-294" v:mID="72" v:groupContext="shape" transform="translate(6.85967,-22.443) rotate(-38.1076)">
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+			<path d="M-0 424.56 A96.1331 44.4001 55.03 0 1 68.24 420.56 L68.51 420.79" class="st17"/>
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+		<g id="shape73-299" v:mID="73" v:groupContext="shape" transform="translate(328.501,-135.937)">
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+			<desc>Key 1</desc>
+			<v:userDefs>
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+		<g id="shape74-305" v:mID="74" v:groupContext="shape" transform="translate(362.251,-135.937)">
+			<title>Rectangle.74</title>
+			<desc>Action 1</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<g id="shadow74-306" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape75-311" v:mID="75" v:groupContext="shape" transform="translate(409.501,-135.937)">
+			<title>Rectangle.75</title>
+			<desc>Key 2</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<g id="shadow75-312" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
+					transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
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+			<rect x="0" y="406.565" width="31.5" height="18" class="st3"/>
+			<text x="4.74" y="418.56" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Key 2</text>		</g>
+		<g id="shape76-317" v:mID="76" v:groupContext="shape" transform="translate(443.251,-135.937)">
+			<title>Rectangle.76</title>
+			<desc>Action 2</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<g id="shadow76-318" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+			<rect x="0" y="406.565" width="42.75" height="18" class="st3"/>
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+		<g id="shape77-323" v:mID="77" v:groupContext="shape" transform="translate(490.501,-135.937)">
+			<title>Rectangle.77</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<g id="shadow77-324" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+			<rect x="0" y="406.565" width="31.5" height="18" class="st3"/>
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+		<g id="shape78-328" v:mID="78" v:groupContext="shape" transform="translate(524.251,-135.937)">
+			<title>Rectangle.78</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow78-329" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape79-333" v:mID="79" v:groupContext="shape" transform="translate(328.501,-113.437)">
+			<title>Rectangle.79</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<g id="shadow79-334" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape80-338" v:mID="80" v:groupContext="shape" transform="translate(362.251,-113.437)">
+			<title>Rectangle.80</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<g id="shadow80-339" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape81-343" v:mID="81" v:groupContext="shape" transform="translate(409.501,-113.437)">
+			<title>Rectangle.81</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow81-344" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape82-348" v:mID="82" v:groupContext="shape" transform="translate(443.251,-113.437)">
+			<title>Rectangle.82</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow82-349" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape83-353" v:mID="83" v:groupContext="shape" transform="translate(490.501,-113.437)">
+			<title>Rectangle.83</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow83-354" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape84-358" v:mID="84" v:groupContext="shape" transform="translate(524.251,-113.437)">
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+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow84-359" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape85-363" v:mID="85" v:groupContext="shape" transform="translate(328.501,-77.4375)">
+			<title>Rectangle.85</title>
+			<desc>Key x</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<rect x="0" y="406.565" width="31.5" height="18" class="st3"/>
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+		<g id="shape86-369" v:mID="86" v:groupContext="shape" transform="translate(362.251,-77.4375)">
+			<title>Rectangle.86</title>
+			<desc>Action x</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+		<g id="shape87-375" v:mID="87" v:groupContext="shape" transform="translate(409.501,-77.4375)">
+			<title>Rectangle.87</title>
+			<desc>Key y</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+		<g id="shape88-381" v:mID="88" v:groupContext="shape" transform="translate(443.251,-77.4375)">
+			<title>Rectangle.88</title>
+			<desc>Action y</desc>
+			<v:userDefs>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<text x="4.89" y="418.56" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Action y</text>		</g>
+		<g id="shape89-387" v:mID="89" v:groupContext="shape" transform="translate(490.501,-77.4375)">
+			<title>Rectangle.89</title>
+			<desc>Key z</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+		<g id="shape90-393" v:mID="90" v:groupContext="shape" transform="translate(524.251,-77.4375)">
+			<title>Rectangle.90</title>
+			<desc>Action z</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+			<rect x="0" y="406.565" width="42.75" height="18" class="st3"/>
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+		<g id="shape91-399" v:mID="91" v:groupContext="shape" transform="translate(328.501,-40.9375)">
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+		<g id="shape92-404" v:mID="92" v:groupContext="shape" transform="translate(362.251,-40.9375)">
+			<title>Rectangle.92</title>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow92-405" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow93-410" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape94-414" v:mID="94" v:groupContext="shape" transform="translate(443.251,-40.9375)">
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+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<g id="shadow94-415" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
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+		<g id="shape95-419" v:mID="95" v:groupContext="shape" transform="translate(490.501,-40.9375)">
+			<title>Rectangle.95</title>
+			<desc>Key N</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+		<g id="shape96-425" v:mID="96" v:groupContext="shape" transform="translate(524.251,-40.9375)">
+			<title>Rectangle.96</title>
+			<desc>Action N</desc>
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+			<desc>hash</desc>
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+		<g id="shape89-223" v:mID="89" v:groupContext="shape" transform="translate(245.254,-132.398)">
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+		<g id="shape90-227" v:mID="90" v:groupContext="shape" transform="translate(245.015,-82.7016)">
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+			<desc>4</desc>
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+		<g id="shape91-231" v:mID="91" v:groupContext="shape" transform="translate(336.326,-81.6288)">
+			<title>Sheet.91</title>
+			<path d="M0 281.23 L0 347.02 L41.18 347.02 L41.18 281.23 L0 281.23 L0 281.23 Z" class="st1"/>
+		</g>
+		<g id="shape92-233" v:mID="92" v:groupContext="shape" transform="translate(339.598,-81.6288)">
+			<title>Sheet.92</title>
+			<path d="M0 281.23 L41.18 281.23 L41.18 347.02 L0 347.02 L0 281.23" class="st9"/>
+		</g>
+		<g id="shape93-236" v:mID="93" v:groupContext="shape" transform="translate(339.264,-132.398)">
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+			<desc>0x0103</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+		<g id="shape94-240" v:mID="94" v:groupContext="shape" transform="translate(339.024,-82.7016)">
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+			<desc>2</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+		<g id="shape95-244" v:mID="95" v:groupContext="shape" transform="translate(438.598,-81.5089)">
+			<title>Sheet.95</title>
+			<path d="M0 281.23 L0 347.02 L41.18 347.02 L41.18 281.23 L0 281.23 L0 281.23 Z" class="st1"/>
+		</g>
+		<g id="shape96-246" v:mID="96" v:groupContext="shape" transform="translate(438.598,-81.5089)">
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+			<path d="M0 281.23 L41.18 281.23 L41.18 347.02 L0 347.02 L0 281.23" class="st9"/>
+		</g>
+		<g id="shape97-249" v:mID="97" v:groupContext="shape" transform="translate(437.81,-132.27)">
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+			<desc>0x0104</desc>
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+		<g id="shape98-253" v:mID="98" v:groupContext="shape" transform="translate(437.57,-82.5735)">
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+			<desc>1</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+		<g id="shape99-257" v:mID="99" v:groupContext="shape" transform="translate(53.5505,-147.924)">
+			<title>Sheet.99</title>
+			<path d="M0.59 283.52 L206.27 343.39 L205.7 345.34 L0 285.48 L0.59 283.52 L0.59 283.52 ZM205.85 341.14 L210.88 345.79
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+			<desc>Groups</desc>
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+			<title>Sheet.112</title>
+			<desc>group id</desc>
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+			<title>Sheet.114</title>
+			<desc>-</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+		<g id="shape115-290" v:mID="115" v:groupContext="shape" transform="translate(529.004,-128.007)">
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+			<desc>Keys separated into</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="97.1729" cy="336.229" width="194.35" height="21.5726"/>
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+			<text x="17.06" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Keys separated into  </text>		</g>
+		<g id="shape116-294" v:mID="116" v:groupContext="shape" transform="translate(529.004,-106.438)">
+			<title>Sheet.116</title>
+			<desc>groups based on</desc>
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+			<text x="14.94" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>some bits from hash</text>		</g>
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+			<text x="3.06" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>-</text>		</g>
+		<g id="shape119-306" v:mID="119" v:groupContext="shape" transform="translate(529.004,-63.2999)">
+			<title>Sheet.119</title>
+			<desc>Groups contain a</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="84.2539" cy="336.229" width="168.51" height="21.5726"/>
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+			<text x="15.38" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Groups contain a  </text>		</g>
+		<g id="shape120-310" v:mID="120" v:groupContext="shape" transform="translate(529.004,-41.7308)">
+			<title>Sheet.120</title>
+			<desc>small number of</desc>
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+			<v:textRect cx="81.4635" cy="336.229" width="162.93" height="21.5726"/>
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+			<text x="15.01" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>small number of  </text>		</g>
+		<g id="shape121-314" v:mID="121" v:groupContext="shape" transform="translate(529.004,-20.1617)">
+			<title>Sheet.121</title>
+			<desc>keys (<28)</desc>
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+			<v:textRect cx="50.4481" cy="336.229" width="100.9" height="21.5726"/>
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+			<text x="8.77" y="341.62" class="st18" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>keys (<28)</text>		</g>
+		<g id="shape122-318" v:mID="122" v:groupContext="shape" transform="translate(19.1996,-146.276)">
+			<title>Sheet.122</title>
+			<path d="M0 310.17 C-0 306.1 3.62 302.8 8.07 302.8 L14.46 302.8 L29.68 282.28 L36.14 302.8 L78.65 302.8 C83.11 302.8
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+		<g id="shape123-320" v:mID="123" v:groupContext="shape" transform="translate(41.9777,-174.053)">
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+			<desc>Group</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="22.8289" cy="339.824" width="45.66" height="14.3829"/>
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+			<text x="5.9" y="343.42" class="st17" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Group  </text>		</g>
+		<g id="shape124-324" v:mID="124" v:groupContext="shape" transform="translate(34.4142,-159.674)">
+			<title>Sheet.124</title>
+			<desc>Identifier</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="31.5173" cy="339.824" width="63.04" height="14.3829"/>
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+			<text x="7.04" y="343.42" class="st17" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Identifier  </text>		</g>
+		<g id="shape125-328" v:mID="125" v:groupContext="shape" transform="translate(28.7716,-145.295)">
+			<title>Sheet.125</title>
+			<desc>(simplified)</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="36.2165" cy="339.824" width="72.44" height="14.3829"/>
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+			<text x="6.19" y="343.42" class="st17" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>(simplified)</text>		</g>
+		<g id="shape127-332" v:mID="127" v:groupContext="shape" transform="translate(517.688,-71.2991)">
+			<title>Sheet.127</title>
+			<desc>Keys separated into groups based on some bits from hash. Grou...</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
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+						x="4" dy="1.211em" class="st23" v:isBullet="true">·</tspan> <tspan class="st24">Groups contain a small number of </tspan><tspan
+						x="22" dy="1.204em" class="st24">keys </tspan><tspan class="st24">(</tspan><tspan class="st24"><</tspan><tspan
+						class="st24">28</tspan><tspan class="st24">)</tspan></text>		</g>
+		<g id="shape129-349" v:mID="129" v:groupContext="shape" transform="translate(336.326,-26.2991)">
+			<title>Sheet.129</title>
+			<desc>Total # of keys in group so far</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="39.6784" cy="333.515" width="79.36" height="27"/>
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+	</g>
+</svg>
diff --git a/doc/guides/prog_guide/img/efd_i8.svg b/doc/guides/prog_guide/img/efd_i8.svg
new file mode 100644
index 0000000..d0fd463
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+++ b/doc/guides/prog_guide/img/efd_i8.svg
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+		<g id="shape101-105" v:mID="101" v:groupContext="shape" transform="translate(448.763,-224.802)">
+			<title>Sheet.101</title>
+			<desc>Lookup Table has</desc>
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+			<v:textRect cx="58.6085" cy="263.792" width="117.22" height="14.3829"/>
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+		<g id="shape102-109" v:mID="102" v:groupContext="shape" transform="translate(484.549,-210.423)">
+			<title>Sheet.102</title>
+			<desc>16 bits</desc>
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+		<g id="shape103-113" v:mID="103" v:groupContext="shape" transform="translate(369.583,-90.8555)">
+			<title>Sheet.103</title>
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+		<g id="shape104-115" v:mID="104" v:groupContext="shape" transform="translate(383.264,-114.932)">
+			<title>Sheet.104</title>
+			<desc>CRC32 (32</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="38.2947" cy="263.792" width="76.59" height="14.3829"/>
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+			<text x="8.33" y="267.39" class="st7" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>CRC32 (32  </text>		</g>
+		<g id="shape105-119" v:mID="105" v:groupContext="shape" transform="translate(386.505,-100.553)">
+			<title>Sheet.105</title>
+			<desc>bit output)</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="32.5584" cy="263.792" width="65.12" height="14.3829"/>
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+			<text x="5.91" y="267.39" class="st7" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>bit output)</text>		</g>
+		<g id="shape106-123" v:mID="106" v:groupContext="shape" transform="translate(313.397,-18)">
+			<title>Sheet.106</title>
+			<path d="M0 226.35 C0 221.43 4.02 217.42 8.94 217.42 L347.02 217.42 C351.97 217.42 355.96 221.43 355.96 226.35 L355.96
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+		<g id="shape107-125" v:mID="107" v:groupContext="shape" transform="translate(313.98,-41.963)">
+			<title>Sheet.107</title>
+			<desc>Goal is to find a hash_index that produces</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="177.75" cy="260.197" width="355.5" height="21.5726"/>
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+			<text x="9.88" y="265.59" class="st8" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Goal is to find a hash_index that produces  </text>		</g>
+		<g id="shape108-129" v:mID="108" v:groupContext="shape" transform="translate(318.48,-20.3939)">
+			<title>Sheet.108</title>
+			<desc>a lookup_table with no contradictions</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="175.5" cy="260.197" width="351" height="21.5726"/>
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+			<text x="28.12" y="265.59" class="st8" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>a lookup_table with no contradictions</text>		</g>
+		<g id="shape109-133" v:mID="109" v:groupContext="shape" transform="translate(18,-196.244)">
+			<title>Sheet.109</title>
+			<path d="M0 250.22 C0 247.92 1.87 246.06 4.16 246.06 L109.18 246.06 C111.47 246.06 113.33 247.92 113.33 250.22 L113.33
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+		</g>
+		<g id="shape110-135" v:mID="110" v:groupContext="shape" transform="translate(29.8201,-196.244)">
+			<title>Sheet.110</title>
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+		</g>
+		<g id="shape111-137" v:mID="111" v:groupContext="shape" transform="translate(32.5663,-199.746)">
+			<title>Sheet.111</title>
+			<desc>Key1: Value = 0</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="50.7562" cy="263.792" width="101.52" height="14.3829"/>
+			<path d="M101.51 256.6 L0 256.6 L0 270.98 L101.51 270.98 L101.51 256.6" class="st3"/>
+			<text x="8.29" y="267.39" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Key1: Value = 0</text>		</g>
+		<g id="shape112-141" v:mID="112" v:groupContext="shape" transform="translate(18,-171.44)">
+			<title>Sheet.112</title>
+			<path d="M0 250.22 C0 247.92 1.87 246.06 4.16 246.06 L109.18 246.06 C111.47 246.06 113.33 247.92 113.33 250.22 L113.33
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+		</g>
+		<g id="shape113-143" v:mID="113" v:groupContext="shape" transform="translate(29.8201,-171.44)">
+			<title>Sheet.113</title>
+			<path d="M0 250.22 C0 247.92 1.67 246.06 3.73 246.06 L97.79 246.06 C99.85 246.06 101.51 247.92 101.51 250.22 L101.51
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+		</g>
+		<g id="shape114-145" v:mID="114" v:groupContext="shape" transform="translate(32.5663,-174.923)">
+			<title>Sheet.114</title>
+			<desc>Key3: Value = 1</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="50.7562" cy="263.792" width="101.52" height="14.3829"/>
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+		<g id="shape115-149" v:mID="115" v:groupContext="shape" transform="translate(18,-146.396)">
+			<title>Sheet.115</title>
+			<path d="M0 250.12 C0 247.81 1.88 245.94 4.19 245.94 L109.15 245.94 C111.46 245.94 113.33 247.81 113.33 250.12 L113.33
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+		<g id="shape116-151" v:mID="116" v:groupContext="shape" transform="translate(29.8201,-146.396)">
+			<title>Sheet.116</title>
+			<path d="M0 250.12 C0 247.81 1.68 245.94 3.75 245.94 L97.77 245.94 C99.84 245.94 101.51 247.81 101.51 250.12 L101.51
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+		<g id="shape117-153" v:mID="117" v:groupContext="shape" transform="translate(32.5663,-149.951)">
+			<title>Sheet.117</title>
+			<desc>Key4: Value = 0</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
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+			<path d="M101.51 256.6 L0 256.6 L0 270.98 L101.51 270.98 L101.51 256.6" class="st3"/>
+			<text x="8.29" y="267.39" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Key4: Value = 0</text>		</g>
+		<g id="shape118-157" v:mID="118" v:groupContext="shape" transform="translate(18,-121.831)">
+			<title>Sheet.118</title>
+			<path d="M0 250.12 C0 247.81 1.88 245.94 4.19 245.94 L109.15 245.94 C111.46 245.94 113.33 247.81 113.33 250.12 L113.33
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+		<g id="shape119-159" v:mID="119" v:groupContext="shape" transform="translate(29.8201,-121.831)">
+			<title>Sheet.119</title>
+			<path d="M0 250.12 C0 247.81 1.68 245.94 3.75 245.94 L97.77 245.94 C99.84 245.94 101.51 247.81 101.51 250.12 L101.51
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+		</g>
+		<g id="shape120-161" v:mID="120" v:groupContext="shape" transform="translate(32.5663,-125.388)">
+			<title>Sheet.120</title>
+			<desc>Key7: Value = 1</desc>
+			<v:textBlock v:margins="rect(0,0,0,0)"/>
+			<v:textRect cx="50.7562" cy="263.792" width="101.52" height="14.3829"/>
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+			<text x="8.29" y="267.39" class="st4" v:langID="1033"><v:paragraph v:horizAlign="1"/><v:tabList/>Key7: Value = 1</text>		</g>
+		<g id="shape121-165" v:mID="121" v:groupContext="shape" transform="translate(140.517,-148.373)">
+			<title>Sheet.121</title>
+			<path d="M0 236.29 L22.75 236.29 L22.75 224.73 L45.5 247.86 L22.75 270.98 L22.75 259.42 L0 259.42 L0 236.29 Z"
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+		</g>
+	</g>
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diff --git a/doc/guides/prog_guide/index.rst b/doc/guides/prog_guide/index.rst
index ed7f770..7f825cb 100644
--- a/doc/guides/prog_guide/index.rst
+++ b/doc/guides/prog_guide/index.rst
@@ -47,6 +47,7 @@ Programmer's Guide
     link_bonding_poll_mode_drv_lib
     timer_lib
     hash_lib
+    efd_lib
     lpm_lib
     lpm6_lib
     packet_distrib_lib
@@ -167,6 +168,28 @@ Programmer's Guide
 
 :numref:`figure_figure39` :ref:`figure_figure39`
 
+:numref:`figure_efd1` :ref:`figure_efd1`
+
+:numref:`figure_efd2` :ref:`figure_efd2`
+
+:numref:`figure_efd3` :ref:`figure_efd3`
+
+:numref:`figure_efd4` :ref:`figure_efd4`
+
+:numref:`figure_efd5` :ref:`figure_efd5`
+
+:numref:`figure_efd6` :ref:`figure_efd6`
+
+:numref:`figure_efd7` :ref:`figure_efd7`
+
+:numref:`figure_efd8` :ref:`figure_efd8`
+
+:numref:`figure_efd9` :ref:`figure_efd9`
+
+:numref:`figure_efd10` :ref:`figure_efd10`
+
+:numref:`figure_efd11` :ref:`figure_efd11`
+
 
 **Tables**
 
diff --git a/doc/guides/rel_notes/release_17_02.rst b/doc/guides/rel_notes/release_17_02.rst
index 5023038..4c94513 100644
--- a/doc/guides/rel_notes/release_17_02.rst
+++ b/doc/guides/rel_notes/release_17_02.rst
@@ -64,6 +64,9 @@ New Features
   is much smaller than a hash-based flow table and therefore, it can better fit for
   CPU cache, being able to scale to millions of flow keys.
 
+  See the :ref:`Elastic Flow Distributor Library <Efd_Library>` documentation in
+  the Programmers Guide document, for more information.
+
 
 Resolved Issues
 ---------------
-- 
2.7.4



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