MediaWiki extensions manual

Wikibase EDTF Release status: stableCategory:Stable extensions
Description	Adds support for the Extended Date/Time Format (EDTF) Specification via a new data type
Author(s)	Jeroen De Dauwtalk
Maintainer(s)	Professional Wiki
Latest version	2.1.1 (2023-03-31)
Compatibility policy	For every MediaWiki release that is a Long Term Support release there is a corresponding branch in the extension.Category:Extensions with long-term support release branches compatibility policy
MediaWiki	1.37-1.39 (2.x) 1.35-1.36 (1.x)Category:Extensions with manual MediaWiki version
PHP	7.4+
Database changes	No
Composer	professional-wiki/wikibase-edtfCategory:Extensions supporting Composer
License	GNU General Public License 2.0 or later
Download	GitHub: project page git repository URL [help ] commit history Category:Extensions in GitHub version control README CHANGELOG
Example	edtf.wikibase.wiki (demo wiki)
Hooks used WikibaseClientDataTypes Category:WikibaseClientDataTypes extensions WikibaseRepoDataTypes Category:WikibaseRepoDataTypes extensions
Compatibility Wikibase Repository REL1_37-REL1_39 (2.x), REL1_35-REL1_36 (1.x)

The Wikibase EDTF extension adds support for the Extended Date/Time Format (EDTF) Specification to Wikibase via a new data type.

This extension has been created and is maintained by Professional Wiki</tvar>. The Luxembourg Ministry of Culture</tvar> funded initial development.

You can find a demo of this extension at https://edtf.wikibase.wiki.

See the documentation for detailed installation and usage instructions or the demo video for a short introduction.

Extended Date/Time Format (EDTF)

EDTF is part of ISO 8601-2:2019, which defines various extensions to ISO 8601 standard, such as uncertainties. For the implementation of the project the development team followed the publicly available concise description of the standard on the specification site of the U.S. Library of Congress.

The implementation supports:

• Dates
• Date and time
• Time Intervals
• Letter-prefixed calendar year
• Seasons
• Qualification of a date
• Unspecified digit(s) from the right
• Negative calendar years
• Exponential years
• Significant digits
• Sub-year groupings
• Set representations
• Qualifications
• Unspecified Digits
• Intervals

Structure

The extension is divided into two libraries. One Library is a standalone PHP EDTF interpretation and humanisation library. It can be found at ProfessionalWiki/EDTF. Note that the library can be used independently from this extension.

This library is wrapped by this extension that interacts with the library and provides further functionality, e.g. GUI and export to RDF.

Functionality

The extension provides the user with an open text field where they can put in any text. Upon saving this text is validated against proper formatting of EDTF. If the string is not properly formatted the string is not saved. The users will be presented with an error message.

When the string is a valid EDTF-date it is saved. In the GUI a 'humanised' string is generated that transforms the string to a short sentences that is human readable.

Example humanisation

[2021-02-15, 2021-02-16, 2021-32, 2020-XX-11]

becomes

Interface translations

The extension is being translated via translatewiki.net. Its project can be found here.

• Top Wikibase extensions — Curated list of key Wikibase extensions

This extension is included in the following wiki farms/hosts and/or packages: Miraheze Category:Extensions included in Miraheze ProWikiCategory:Extensions included in ProWiki WikiForgeCategory:Extensions included in WikiForge This is not an authoritative list. Some wiki farms/hosts and/or packages may contain this extension even if they are not listed here. Always check with your wiki farms/hosts or bundle to confirm.