>I am sorry to bother. I do hope that this is not an off-topic question.
>Is there any example that I can refer to about using DTD on an RDF
>document?

See http://lists.w3.org/Archives/Public/www-rdf-interest/ for archives and
information on subscribing to the only RDF mailing list that I know of. 

Bob DuCharme          www.snee.com/bob           <bob@  
snee.com>  "The elements be kind to thee, and make thy
spirits all of comfort!" Anthony and Cleopatra, III ii


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