Proposed process for DTDs in XML (Implementations)

[Ron Bourret]

Paul Prescod wrote:

> Your last instinct is correct. A DTD is not a tree, but a directed acyclic
> graph.

Are you sure the graph is acyclic?  I thought the following was a valid DTD:

<!ELEMENT a (b)>
<!ELEMENT b (#PCDATA | a)*>

Thanks.

-- Ron Bourret

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