get categories from wiki page

[arieljannai]

getting all the categories assigned to a given wiki page

[arieljannai]

To get all the categories of a wiki page we will invoke this:
http://en.wikipedia.org/w/api.php?format=json&action=query&titles=Java&prop=categories&clshow=!hidden

• format=json OR xml (maybe more)
• action=query (there is a lot more)
• titles=Our wiki page
• prop=categories (if more then one, use | (pipe line) to seperate them)
• clshow=!hidden (or nothing, or hidden) - to get only the visible categories. Usualy, the hidden categories are used to wiki admins and bots.

The result is something like this:

{"query":{"pages":{"69336":{"pageid":69336,"ns":0,"title":"Java","categories":[{"ns":14,"title":"Category:All articles with unsourced statements"},{"ns":14,"title":"Category:Articles containing Indonesian language text"},{"ns":14,"title":"Category:Articles with unsourced statements from June 2009"},{"ns":14,"title":"Category:Greater Sunda Islands"},{"ns":14,"title":"Category:Java"}]}}}}

As we can see, the page is tagged to couple of categories, like:

• Greater Sunda Islands
• Java

[arieljannai]

more information about wiki api at:
http://en.wikipedia.org/w/api.php

[arieljannai]

• to get all the sub categories of a category:

  http://en.wikipedia.org/w/api.php?format=json&action=query&list=categorymembers&cmtitle=Category:Java&cmtype=subcat

• to get all the pages use:

  http://en.wikipedia.org/w/api.php?format=json&action=query&list=categorymembers&cmtitle=Category:Java&cmtype=page

• and for files, use:

  http://en.wikipedia.org/w/api.php?format=json&action=query&list=categorymembers&cmtitle=Category:Java&cmtype=file

• its supposed to work with page|subcat|file, but its not working :(