2.1.1362 Part 4 Section 188.8.131.52, off (Offset)
For additional notes that apply to this portion of the standard, please see the notes for chOff, §184.108.40.206(b) .
a. The standard states that the offset element specifies the location of the bounding box of an object.
In Office, the offset element specifies the location of a bounding box of an object as defined by the ext element.