List of String Attachment Points?

Is there a master list of Strings that can use as Art Attachment Points? All I can gather from looking at other spells is

overhead
origin



what are the other ones?

http://www.wc3campaigns.com/forums/s...threadid=28640

~kharma

http://www.wc3campaigns.com/forums/s...threadid=27893

^ ^ That's more to the point. ^ ^

Also, use the search function. There are so many of these threads that can easily be found.