well there's no global standard for that - you should make the decisions based on your own specific needs. obviously. everyone has different standards for their data integrity. I've seen some strict shockers, and likewise I've seen some horribly lax standards. I for instance like to be somewhere in between.<BR><BR><BR><BR>http://rtfm.atrax.co.uk/
... create business rules... shouldn't be too hard to decide what you think is allowed data and what isn't...<BR><BR>if you give these business rules (or white paper, whatever ya wanna call it) to your developers they should be able to make strict validation...<BR><BR>haven't heard of any standards though.