Wikipedia:Quick intersection

 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)
 * JSONP - Name of callback function (JSON only)