Here is a list of the tagging metatags available out of the box:
source=(*, none) eg -- using this metatag will ignore anything set in the "Source" box
source= -- set source to
source=none -- set source to NULL
Metatags can be followed by ":" rather than "=" if you prefer.
I.E: "source:", "source=" etc.
Some tagging metatags provided by extensions:
Numeric Score
vote=(up, down, remove) -- vote, or remove your vote on an image
pool=(PoolID, PoolTitle, lastcreated) -- add post to pool (if exists)
pool=(PoolID, PoolTitle, lastcreated):(PoolOrder) -- add post to pool (if exists) with set pool order
pool=50 -- add post to pool with ID of 50
pool=10:25 -- add post to pool with ID of 10 and with order 25
pool=This_is_a_Pool -- add post to pool with a title of "This is a Pool"
pool=lastcreated -- add post to the last pool the user created
Post Relationships
parent=(parentID, none) -- set parent ID of current image
child=(childID) -- set parent ID of child image to current image ID