[10:17:20] <tanny411>	 Hi, I have been reading about tags https://en.wikipedia.org/wiki/Wikipedia:Tags, and goign through the change_tag_def table in enwiki, I see some weird named tags and ctd_user_defined marked 1.  My question is who can define these tags so I can ignore them if not important.
[10:19:18] <tanny411>	 my work is to check the tags for pages to identify important pages through it if possible