RE: [xml-dev] Schematron: Categories of Usage?

> Algorithmic Checking: the validity of data in an XML instance 
> document is determined not by mere examination or comparison 
> of the data, but requires performing an algorithm on the data.

I'm not quite sure "algorithm" is an appropriate term, given that XPath is
not computationally complete: but I can't immediately think of anything
better.

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