RE: When to Validate XML?
> -----Original Message----- > From: Leigh Dodds [mailto:ldodds@i...] > Sent: Tuesday, November 06, 2001 9:28 AM > To: Champion, Mike; xml-dev@l... > Subject: RE: When to Validate XML? > > > If you've got multiple systems accessing > a database then the only way to enforce these kind of checks is within > the RDBMS. There's no guarantees that the application level > logic will be consistent across all your applications. Ahh, good point, and one for the validation decision tree: Use a Schema/DTD and XML-level validation to enforce constraints that are universal across applications that use a specific data format. Use application logic (procedural code?) to enforce constraints that specialized applications know about. For (a quickly contrived) example, a bookstore site might need some specialized module that knows about ISBNs and how to validate them against a database; most other modules just need to ensure that the ISBN value doesn't get lost and "trust" that nobody mucks with the value.
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