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At 12:13 AM -0700 10/10/01, Ronald Bourret wrote: >The problem is that NITF uses mixed content and mixed content doesn't >map well with an object-relational mapping. (I won't go into the details >here. If you want to read more about this, see sections 3.3 and 3.4 of >http://www.xml.com/pub/a/2001/05/09/dtdtodbs.html.) > >Furthermore, as far as I know, the only product that supports mixed >content in an object-relational mapping is mine (XML-DBMS) and I >recommend that people don't use XML-DBMS with mixed content because it >is so inefficient. (XML-DBMS started out as a research project and I >supported mixed content for completeness. Were I to do it over again, I >probably wouldn't support it.) > I'm a little surprised that more products don't support mixed content. I must say that if a so-called XML database doesn't support semi-structured data and mixed content, I really can't see why you'd use it instead of a relational database. In fact, I'd venture to say that if your database can't handle mixed content, then it isn't an XML database. Mixed content is a *very* fundamental part of XML, not something that can be ignored. I guess I'll have to add "Do you support mixed content?" to the list of tough questions I bother XML database vendors with on the exhibit floor at conferences. :-) -- +-----------------------+------------------------+-------------------+ | Elliotte Rusty Harold | elharo@m... | Writer/Programmer | +-----------------------+------------------------+-------------------+ | The XML Bible, 2nd Edition (Hungry Minds, 2001) | | http://www.ibiblio.org/xml/books/bible2/ | | http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ | +----------------------------------+---------------------------------+ | Read Cafe au Lait for Java News: http://www.cafeaulait.org/ | | Read Cafe con Leche for XML News: http://www.ibiblio.org/xml/ | +----------------------------------+---------------------------------+
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