XSD restriction that negates a matching string

Question

I want my XSD to validate the contents of a string. To be specific, I want to validate that a certain string does not occur.

Consider this rule, which

Answer 1

You don't mention whether you are bound to XML Schema 1.0 and XPath 1.0, but if not it is possible to accomplish your goal with xs:assert's, along the lines of this (which may need some work - this is from memory...):

Some links of possible interest:

http://www.ibm.com/developerworks/library/x-xml11pt2/

http://www.w3.org/TR/xpath-functions/#func-starts-with

Cheers,