Tags inside Property Value
From semantic-mediawiki.org
Fragment of a discussion from Help talk:Properties and types
MediaWiki generally encodes content for any <tag>
notation [0] which makes fetching the plain value (when displayed by the browser) after it has been processed by MW rather complex [1].
[0] https://github.com/SemanticMediaWiki/SemanticMediaWiki/issues/232
[1] https://github.com/SemanticMediaWiki/SemanticMediaWiki/pull/794