MediaWiki:Apihelp-query+categorymembers-param-namespace
From Marisa's Apps Wiki
Only include pages in these namespaces. Note that $1type=subcat or $1type=file may be used instead of $1namespace=14 or 6.
Only include pages in these namespaces. Note that $1type=subcat or $1type=file may be used instead of $1namespace=14 or 6.
