That doesn't really capture Rule 90. I think two rules are necessary:
[R 87] The only Abbreviations and Acronyms allowed in the naming of Element, Attribute and
Simple and Complex Types are those contained in the list published in Section XX. [Editor's note: Section xx to be a
section in the NDR document. Currently this section only includes ID for
Identifier, DUNS, and URI.]
[R90] The Abbreviations and Acronyms listed in Section XX MUST be used when referring to ( or 'in the place of'?) their corresponding references.
_
MikeG