Walter Lewis wrote:
> In the existing variations on the DTD could you not add an attribute URL
> to the appropriate tags (and please add <figure> to the list) while
> still accommodating those who prefer a set of declared entities (or "keys")?
yes, indeed. its what I do myself in my local TEI extensions
> Is this a But Not If We Move To XML Schema issue, or is this just a new
> ingredient for the pizza?
There is nothing schema vs DTD in this, I believe.
However, if you use RelaxNG schemas, you can express the
constraint _either_ url= _or_ doc=, but not both. Which may
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