MediaWiki:Apihelp-query+categorymembers-param-type
From MoodleDocs
Which type of category members to include. Ignored when $1sort=timestamp is set.
Note: You are currently viewing documentation for Moodle 3.1. Up-to-date documentation for the latest stable version of Moodle is probably available here: Apihelp-query+categorymembers-param-type.