thiemowmde added a comment.
Yes, I believe so. Short answer: It's not Wikibase, it's MediaWiki. https://phabricator.wikimedia.org/diffusion/EWBA/browse/master/repo/includes/Validators/UrlSchemeValidators.php$53 https://phabricator.wikimedia.org/source/mediawiki/browse/master/includes/parser/Parser.php$95 As of now, Wikibase intentionally blacklists the same characters in URLs that are also blacklisted when using URLs in wikitext. The reason square brackets are blacklisted is MediaWiki's URL syntax: `[http://example.com label]`. Prominent help pages like https://en.wikipedia.org/wiki/Help:URL explain how to work around this limitation: replace `[` and `]` with `%5B` and `%5D`. Since what is stored in the Wikibase database is not wikitext, it would be possible to lift this limitation – in theory. We could even allow whitespace, for example. However, this requires us to encode these characters when the value is used. And that might be the main problem: we don't own most of the code that consumes Wikibase data. Allowing square brackets might result in 3rd party tools outputting broken wikitext. The formatters Wikibase itself provides could be updated to support a larger character set: https://phabricator.wikimedia.org/diffusion/EWBA/browse/master/lib/includes/Formatters/WikibaseValueFormatterBuilders.php$328 There is a StringFormatter in this code that does **not** do any escaping (denoted with a comment). This would need to be replaced with a formatter that escapes just the right characters, just the right way, to result in an URL the MediaWiki parser can understand. In theory, this means replacing all characters that are blacklisted in the MediaWiki parser with their `%…` hex escape sequence. However, I'm not sure if this can safely be done in all cases. It might as well result in broken URLs. Unfortunately, most consumers don't use the Wikibase fomatters. TASK DETAIL https://phabricator.wikimedia.org/T214300 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: thiemowmde Cc: Michael, Lydia_Pintscher, thiemowmde, Jc86035, Pigsonthewing, Aklapper, Biazzzzoo, Philoserf, darthmon_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Wikidata-bugs, Hydriz, aude, Mbch331, Jay8g
_______________________________________________ Wikidata-bugs mailing list Wikidata-bugs@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs