Re: [docbook] biblio database duplicate id in sets

Bob Stayton wrote:

 > As you discovered, the XSL specification requires that
 > each id value must be unique within a document.

It even is in the XML spec:

http://www.w3.org/TR/REC-xml.html#id

"Validity constraint: ID

Values of type ID must match the Name production. A name must not appear 
more than once in an XML document as a value of this type; i.e., ID 
values must uniquely identify the elements which bear them."

Tobi

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