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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2026 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

iso_639

This library provides ISO 639 sets 1, 2, 3, and 5 lookups generated from the Library of Congress and SIL maintenance-agency sources. It requires Unicode support from the backend Prolog compiler.

The set 1 and set 2 data are generated from the Library of Congress ISO 639-2 code list. The set 3 data are generated from the SIL tab-delimited code set download. The set 5 data are generated from the Library of Congress ISO 639-5 identifier list.

The refresh tooling lives in `library/iso_639/scripts/` together with the checked-in source snapshots used to regenerate the fact tables using shell scripts only.

API documentation

Open the [../../apis/library_index.html#iso_639](../../apis/library_index.html#iso_639) link in a web browser.

Loading

To load all entities in this library, load the loader.lgt file:

| ?- logtalk_load(iso_639(loader)).

Testing

To test this library predicates, load the tester.lgt file:

| ?- logtalk_load(iso_639(tester)).