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RE: [xml-dev] XPath 2.0 Best Practice Issue: Graceful Degradation

> Ah, you are bringing up an excellent point: how do we design 
> an XPath statement that gracefully degrades when the expected 
> schema checking is absent?

You can check whether validation has been performed using "instance of"

if (airplane instance of schema-element(airplane)) then ...

Or in XSLT you can do it more declaratively:

<xsl:template match="document-node(schema-element(airplane))">
   normal case

<xsl:template match="/">
  error case

Michael Kay

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