.. index:: single: iso_639_protocol
.. _iso_639_protocol/0:

.. rst-class:: right

**protocol**

``iso_639_protocol``
====================

Protocol for ISO 639 language and language-group lookups.

| **Availability:** 
|    ``logtalk_load(iso_639(loader))``

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

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


| **Dependencies:**
|   (none)


| **Remarks:**
|    (none)

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

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

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

.. index:: language/3
.. _iso_639_protocol/0::language/3:

``language/3``
^^^^^^^^^^^^^^

Enumerates ISO 639-1 entries as alpha-2, alpha-3, and English name tuples.

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

| **Template:**
|    ``language(Alpha2,Alpha3,Name)``
| **Mode and number of proofs:**
|    ``language(?atom,?atom,?atom)`` - ``zero_or_more``


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

.. index:: language_code/5
.. _iso_639_protocol/0::language_code/5:

``language_code/5``
^^^^^^^^^^^^^^^^^^^

Enumerates ISO 639-2 entries as bibliographic code, terminologic code, alpha-2 code, English name, and class tuples. The class is one of ``individual``, ``macrolanguage``, ``collective``, ``special``, or ``local_use``.

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

| **Template:**
|    ``language_code(Bibliographic,Terminologic,Alpha2,Name,Class)``
| **Mode and number of proofs:**
|    ``language_code(?atom,?atom,?atom,?atom,?atom)`` - ``zero_or_more``


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

.. index:: language/5
.. _iso_639_protocol/0::language/5:

``language/5``
^^^^^^^^^^^^^^

Enumerates ISO 639-3 entries as alpha-3 code, alpha-2 code, scope, type, and English name tuples. The scope is one of ``individual``, ``macrolanguage``, ``collective``, or ``special`` and the type is one of ``living``, ``extinct``, ``ancient``, ``constructed``, or ``special``.

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

| **Template:**
|    ``language(Alpha3,Alpha2,Scope,Type,Name)``
| **Mode and number of proofs:**
|    ``language(?atom,?atom,?atom,?atom,?atom)`` - ``zero_or_more``


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

.. index:: language_group/2
.. _iso_639_protocol/0::language_group/2:

``language_group/2``
^^^^^^^^^^^^^^^^^^^^

Enumerates ISO 639-5 entries as group code and English name tuples.

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

| **Template:**
|    ``language_group(Code,Name)``
| **Mode and number of proofs:**
|    ``language_group(?atom,?atom)`` - ``zero_or_more``


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

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

(none)

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

(none)

Operators
---------

(none)