2.1.1800 Part 4 Section 22.214.171.124, shapetype (Shape Template)
For additional notes that apply to this portion of the standard, please see the notes for background, §17.2.1(a); arc, §126.96.36.199(c-mm,oo-xx,ccc-lll,nnn,qqq, rrr,ttt-yyy,aaaa, bbbb,dddd-jjjj); curve, §188.8.131.52(d); image, §184.108.40.206(b-f).
a. The standard indicates how the master attribute is used.
Office considers the presence and absence of this attribute to represent true and false values, respectively. If this attribute exists and is set to any value, including an empty string, Office considers it to be true.
b. The standard states that chromakey and opacity are valid attributes on the shapetype element.
Office does not support these attributes on this element.