Since it isn't quite dead yet (just mortally wouned), I have a question DTD Elements. Note: Beginner's question is being posed. Please excuse any cases of gross lack of knowledge. We are working on DTD with the following requirement: - Base element consists of Child elements First, Second, Third, and Fourth. - First must appear under Base. - Second, Third, and Fourth may appear zero or one time. - Order is not important for elements Second, Third, and Fourth. The original statement in my DTD was <!ELEMENT Base (First, Second?, Third?, Fourth?)> Which imposes an order constraint on the elements. It was suggested that <!ELEMENT Base (First (Second|Third|Fourth)?)> was more correct. However, this appears it will allow only Second, Third, _or_ Fourth element, not all three. Is this correct? Conversely: <!ELEMENT Base (First (Second|Third|Fourth)*)> seems to allow enough elements (zero or one of each) but also allows more than one. Is there a good way to address this situation or is this a limit of DTDs? Do Schemas handle this any better? Again, thank you for you patience. - Richard _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
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