RE: [xml-dev] Does a XSD schema define the minimum or maximum structure of an XML doc?

> Assume I have an XML doc and the referring XSD schema.
> 
> Can I add now additional elements and additional attributes 
> (for existing
> elements) in the XML doc without getting the XML doc invalid?
> 

Only if the schema allows it, by means of wildcards: xs:any and
xs:anyAttribute. It's up to the schema designer whether to permit such
extensions or not.

Michael Kay
http://www.saxonica.com/