Wikipedia:Category math feature
 | The following is a proposed Wikipedia policy, guideline, or process. The proposal may still be in development, under discussion, or in the process of gathering consensus for adoption. |
- This proposal is a non-trivial change and may cause disruption. It should also make a request on MediaZilla as a feature request.
This is a proposal advocating the implementation of category math feature to the MediaWiki software on the English Wikipedia. Category math feature allows Wikipedians to list categories by intersection, union and subtraction. A typical Wikipedia user could find the intersection of two or more categories to be useful and efficient.
Examples:
- Category:Guyanese actors → Category:Guyanese people & Category:Actors
- Category:Actors by nationality would no longer be needed
- Category:Actors / Category:Actresses → Category:Actor / Category:Male person / Category:Female person
- Category:Child actors by nationality → Category:Child actors / Category:Actors / Category:Male person / Category:Female person / Category:Guyanese people
- Category:Living people & Category:Golfers → Living golfers
The concern for this well favoured top-level concept would be how it would be implemented; how it would affect the performance of the live Wikipedia.
Wikinews have already implemented something like it with Wikinews:Wikinews:DynamicPageList.
Category math syntax
What are the actual specifications for the category math syntax?
See also
- Talk:List of sailors/Archived feature proposal
- Meta:Categorization#Intersection
- meta:Category_math
- MediaZilla bug #2725: View list of articles in subcategories all on one page
- MediaZilla bug #1106: Boolean search in categories
- MediaZilla bug #3972: List articles by more categories