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Re: XPath "validation"

Subject: Re: XPath "validation"
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Tue, 06 Dec 2011 15:57:29 +0000
Re:  XPath "validation"
On 06/12/2011 15:38, Wolfgang Laun wrote:
Anthony B. Coates presented "'Full Impact' Schema differencing" at XML
Prague 2010. It uses a thing called XML Zebra, available from
http://www.xmlzebra.com, to generate all XPaths from an XML Schema.


The number of paths that can find a non-empty result is of course infinite. Even if you confine yourself to paths using the child and attribute axes, the number of possible paths is infinite if the schema is recursive. That doesn't mean that you can't represent this infinite set in some way, or compute it in a finite time; just don't expect the answer to be a simple list of permitted path expressions.

Michael Kay
Saxonica

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