.. index:: single: frequent_pattern_mining_common
.. _frequent_pattern_mining_common/0:

.. rst-class:: right

**category**

``frequent_pattern_mining_common``
==================================

Shared predicates for frequent itemset miner dataset validation, support accumulation, and itemset ordering/filtering helpers.

| **Availability:** 
|    ``logtalk_load(frequent_pattern_mining_protocols(loader))``

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-04-29

| **Compilation flags:**
|    ``static``


| **Extends:**
|    ``public`` :ref:`pattern_miner_common <pattern_miner_common/0>`
| **Uses:**
|    :ref:`list <list/0>`
|    :ref:`type <type/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`pattern_miner_protocol/0::check_pattern_miner/1`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`pattern_miner_protocol/0::diagnostic/2`  :ref:`pattern_miner_protocol/0::diagnostics/2`  :ref:`pattern_miner_protocol/0::export_to_clauses/4`  :ref:`pattern_miner_protocol/0::export_to_file/4`  :ref:`pattern_miner_protocol/0::mine/2`  :ref:`pattern_miner_protocol/0::mine/3`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`pattern_miner_protocol/0::pattern_miner_options/2`  :ref:`pattern_miner_protocol/0::print_pattern_miner/1`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  :ref:`pattern_miner_protocol/0::valid_pattern_miner/1`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

.. index:: check_transactions/4
.. _frequent_pattern_mining_common/0::check_transactions/4:

``check_transactions/4``
^^^^^^^^^^^^^^^^^^^^^^^^

Validates the collected dataset transactions and returns the maximum transaction length.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``check_transactions(Dataset,ItemDomain,Transactions,MaxTransactionLength)``
| **Mode and number of proofs:**
|    ``check_transactions(+object_identifier,+list(atom),+list(pair(integer,list(atom))),-integer)`` - ``one``


------------

.. index:: sort_patterns/2
.. _frequent_pattern_mining_common/0::sort_patterns/2:

``sort_patterns/2``
^^^^^^^^^^^^^^^^^^^

Sorts itemset patterns first by pattern length and then lexicographically.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``sort_patterns(Patterns0,Patterns)``
| **Mode and number of proofs:**
|    ``sort_patterns(+list(compound),-list(compound))`` - ``one``


------------

.. index:: filter_patterns/3
.. _frequent_pattern_mining_common/0::filter_patterns/3:

``filter_patterns/3``
^^^^^^^^^^^^^^^^^^^^^

Filters itemset patterns by minimum pattern length.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``filter_patterns(Patterns0,MinimumPatternLength,Patterns)``
| **Mode and number of proofs:**
|    ``filter_patterns(+list(compound),+integer,-list(compound))`` - ``one``


------------

.. index:: count_items/4
.. _frequent_pattern_mining_common/0::count_items/4:

``count_items/4``
^^^^^^^^^^^^^^^^^

Accumulates support counts for a list of items.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``count_items(Items,Count,ItemCounts0,ItemCounts)``
| **Mode and number of proofs:**
|    ``count_items(+list(atom),+integer,+list(pair(atom,integer)),-list(pair(atom,integer)))`` - ``one``


------------

.. index:: select_frequent_item_supports/3
.. _frequent_pattern_mining_common/0::select_frequent_item_supports/3:

``select_frequent_item_supports/3``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Selects the item supports that satisfy the minimum support count.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``select_frequent_item_supports(ItemCounts,SupportCount,FrequentItemSupports)``
| **Mode and number of proofs:**
|    ``select_frequent_item_supports(+list(pair(atom,integer)),+integer,-list(compound))`` - ``one``


------------

.. index:: valid_itemset_patterns/2
.. _frequent_pattern_mining_common/0::valid_itemset_patterns/2:

``valid_itemset_patterns/2``
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

True when the patterns are valid ``itemset(Items, Support)`` terms over the given item domain with positive integer supports.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``valid_itemset_patterns(ItemDomain,Patterns)``
| **Mode and number of proofs:**
|    ``valid_itemset_patterns(+list(atom),+list(compound))`` - ``zero_or_one``


------------

Private predicates
------------------

(no local declarations; see entity ancestors if any)

Operators
---------

(none)