[jdom-interest] Internal DTD subset verification

[Elliotte Rusty Harold]

I'm bothered by the failure to check the internal DTD subset for 
well-formedness. I'd like to add a checkInternalDTDSubset() method to 
the Verifier class. Initially this could call checkCharacterData() to 
make sure the internal subset doesn't contain any illegal characters 
like null or vertical tab. Longer term, however, we could add methods to 
actually verify tht it's a well-formed collection of declarations. We 
could probably piggy-back off of work done elsewhere for reading these 
things such as Mark Wutka's DTDParser 
<http://www.wutka.com/dtdparser.html> or the equivalent code in Xerces 
or Crimson.

Thoughts? Is this worth doing?

-- 
+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo at metalab.unc.edu | Writer/Programmer |
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|           The XML Bible, 2nd Edition (IDG Books, 2001)             |
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|   http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/   |
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