I don't recall whether we decided this matter or not. I would search for it myself, but I tried and failed to find anything. This is a hard topic to do searching on... no good keywords.

If element 'e' has maxOccurs = 1, minOccurs = 1 (or neither are mentioned), is e[1] a valid expression? what about e[../some/pathExp/here]?

If element 'e' has minOccurs= 0 maxOccurs = 1, is e[1] a valid expression, or do you access an optional element just by ../e ?

Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com

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