This page is currently inactive and is retained for
historical reference. Either the page is no longer relevant or consensus on its purpose has become unclear. To revive discussion, seek broader input via a forum such as the
village pump.
The newest recommended tool for category intersections is
PetScan.
Quick Intersection was an external tool developed by Magnus Manske that utilized the WMF Labs databases to generate very fast category trees and tree intersections. (According to Manske, the tool was replaced by
PetScan.)
Options
Language - Project language code (en, es, hi, he etc.)
Project - Project to search (wikipedia, wikisource etc.)
Use "commons"/"wikimedia" for Commons; use "wikidata"/"wikidata" for Wikidata
Root categories - Categories to find intersections for
One category name per row, no "Category:" prefix
Namespace - Namespace to search
Depth - Category tree depth
Use "-1" for unlimited depth; use "0" to just get pages in the given categories, without subcategories
Max results - Limit on number of results to be displayed
Offset
Together with "limit", page through long result lists
Format - Result format
Image usage - Global image usage (enforces commons.wikimedia, namespace 6, not sparse)
Sparse - Just return namespace-prefixed page titles (JSON only)
Group - Group results by category key (JSON only, not for images)
Count - Get count of all possible results as well (JSON only; set 'Max results' to just get the count)
Category lists - Get the categories containing the individual page
Redirects - Include redirect pages in results?
Wikidata item - Get the corresponding Wikidata item for the individual page (or get only pages without Wikidata items)