Allow inferencing on other namespaces than Category

[simontaurus]

• SMW only supports basic inferencing for Categories

  • https://www.semantic-mediawiki.org/wiki/Help:Special_property_Subcategory_of
  • https://www.semantic-mediawiki.org/wiki/Help:Inferencing#Subcategories
  • https://www.semantic-mediawiki.org/wiki/Help:Unions_of_results

• links to related sources

  • SemanticMediaWiki/SemanticMediaWiki@bc121ef
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/tree/91546f4c02af0409f97bacecd142a6170d78cde2/src/SPARQLStore
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/91546f4c02af0409f97bacecd142a6170d78cde2/src/SPARQLStore/QueryEngine/ConditionBuilder.php#L310
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/search?q=setJoinVariable
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/44cc7f39bda4b01f378cb436295f651a2699cdd5/src/SPARQLStore/QueryEngine/DescriptionInterpreters/ClassDescriptionInterpreter.php
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/44cc7f39bda4b01f378cb436295f651a2699cdd5/src/SQLStore/QueryEngine/DescriptionInterpreterFactory.php#L79
  • https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/91546f4c02af0409f97bacecd142a6170d78cde2/src/SPARQLStore/QueryEngine/DescriptionInterpreterFactory.php#L55