I\'m having hard time to figure out a basic task: how to find a term restricted in a specific category..
i feel Wiki API documentation is kinda confusing...
I feel your pain bro, try something like:
http://en.wikipedia.org/w/api.php?action=query&list=search&format=jsonfm&srsearch=matrix+incategory:English-language_films
Change the above format from jsonfm to json for real json output.
You can't tell the API to only return articles from a category that match a certain criteria, unfortunately. You can, however, tell the API to return articles in a specific category, such as "1990s science fiction films", and then use another programming language such as PHP or JavaScript to then return the articles that match your specified criteria.