.. index:: single: interval_algebra_protocol
.. _interval_algebra_protocol/0:

.. rst-class:: right

**protocol**

``interval_algebra_protocol``
=============================

Allen interval algebra protocol over the 13 base relation atoms.

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

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-05-13

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


| **Dependencies:**
|   (none)


| **Remarks:**
|    (none)

| **Inherited public predicates:**
|    (none)

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

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

.. index:: relation/1
.. _interval_algebra_protocol/0::relation/1:

``relation/1``
^^^^^^^^^^^^^^

Enumerates valid Allen base relation atoms in canonical order.

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

| **Template:**
|    ``relation(Relation)``
| **Mode and number of proofs:**
|    ``relation(?atom)`` - ``zero_or_more``


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

.. index:: converse/2
.. _interval_algebra_protocol/0::converse/2:

``converse/2``
^^^^^^^^^^^^^^

Relates an Allen base relation atom with its converse relation atom.

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

| **Template:**
|    ``converse(Relation,Converse)``
| **Mode and number of proofs:**
|    ``converse(?atom,?atom)`` - ``zero_or_more``


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

.. index:: compose/3
.. _interval_algebra_protocol/0::compose/3:

``compose/3``
^^^^^^^^^^^^^

Returns the canonical ordered list of Allen base relation atoms resulting from composing two Allen base relation atoms.

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

| **Template:**
|    ``compose(Relation1,Relation2,Relations)``
| **Mode and number of proofs:**
|    ``compose(+atom,+atom,-list(atom))`` - ``zero_or_one``


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

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

(none)

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

(none)

Operators
---------

(none)

.. seealso::

   :ref:`interval_protocol <interval_protocol/0>`, :ref:`interval <interval/0>`, :ref:`interval_algebra <interval_algebra/0>`, :ref:`interval_relation_set_protocol <interval_relation_set_protocol/0>`, :ref:`interval_relation_set <interval_relation_set/0>`