RE: [xml-dev] [off-topic] Re: [xml-dev] Use xsd to specify multiple inst

["Michael Kay" <mike@saxonica.com>]

> but the danger with complex 
> > assertions is that the diagnostics when they are not 
> satisfied can get rather obscure.
> >   
> Hence the criticality of natural language formulations of the 
> intent of the assertion test. Which was the departure point 
> for Schematron in 1999.
> 

That solves an important part of the problem, namely explaining the rule
that has been breached. It doesn't help much with the other half of the
problem, which is locating where it has been breached - given that the rule
might concern the consistency of a number of elements or attributes widely
scattered through the document.

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