Graph APIで写真にタグ付けする

FacebookのGraph APIで写真にタグ付けをする場合のパラメータは以下

Photo #tag

Parameter	Description	Type	Required
to	USER_ID of the User to tag; can also be provided in URL path (see above).	string	One of to ortag_text
tag_text	A text string to tag.	string	One of to ortag_text
x	x coordinate of tag, as a percentage offset from the left edge of the picture	number	no
y	y coordinate of tag, as a percentage offset from the top edge of the picture	number	no

If the write is successful, you get the following return.

Description	Type
If the update succeeded	boolean