2.1.229 Part 4 Section 18.104.22.168, basedOn (Parent Style ID)
For additional notes that apply to this portion of the standard, please see the notes for numStyleLink, §2.9.22(a).
a. The standard allows loops in the style based-on chain.
Word requires that the style based-on chain does not have a circular reference.
b. The standard does not limit the length of the value of the val attribute.
Word restricts the value of this attribute to be at most 253 characters.