[xsl] Either-Or Constraint

Subject: [xsl] Either-Or Constraint
From: "Jack Cane" <jwcane@xxxxxxxxxxx>
Date: Sun, 9 Mar 2003 21:47:38 -0500
I would like to enforce a constraint that an element must have one and/or
the other of two child elements. That is, the two child elements are both
0..unbounded, but one or the other must be present.

To put it another way, if B is absent, A must be present, but if B is
present, A is optional.

Would also like to know if XmlSpy supports this in its GUI.

tks,

jwc



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