XML validation common mistakes question

[Adam Teg]

Any guess why an DocumentBuilder parses an XML fine but it does not catch the schema contraint error. When I put a malformed xml it catches the problem. But when I remove a required attribute it is fine. I have setAttribute with XMLSchema and XSD. Please hint on common mistakes.

Thanks

[Paul Clapham]

That's probably because you aren't telling the parser to validate against your schema, or if you are then you aren't doing it correctly.

I haven't used schemas myself but the Ranch has an XML FAQ page. There are links about validating against schemas there, so check them out.