Roy Smith wrote: > What's the best way to tell if an article is in a general category? > Specifically, given a page title, I want to know if that page is > (transitively) in Category:Song. For example, I can get > > http://en.wikipedia.org/w/api.php?action=query&prop=categories&titles=bohemian%20Rhapsody&cllimit=50 > <http://en.wikipedia.org/w/api.php?action=query&prop=categories&titles=bohemian > Rhapsody&cllimit=50> > > which gives me (in part) (...) > What I really want to know is if the page is in Category:Song. In fact, > it is, because of the category chain: 1975 singles -> 1975 songs > -> Songs by year -> Songs, but finding that path involved some intuition > about likely paths to explore. Lacking such intuition, is there any > better mechanism in the API other than an exhaustive search through the > category tree? > > > -- > Roy Smith > r...@panix.com <mailto:r...@panix.com>
You could implement some heuristic, like "follow categories which contain the target category name in them", which would lead you to Category:Songs via Category:Songs written by Freddie Mercury -> Category:Songs by songwriter -> Category:Songs But in order to determine a page is NOT in that category you will need an exhaustive search (skipping already traversed categories). If you want to test all articles for the same category, it would be easier to build the graph or child categores of Category:Song, and you could then directly test for pertenence to any of them (or make the article list while you are browsing the categories). _______________________________________________ Mediawiki-api mailing list Mediawiki-api@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/mediawiki-api
