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Re: Be careful writing XPath expressions when the XMLcould hav

• From: Liam R E Quin <liam@w3.org>
• To: xml-dev@lists.xml.org
• Date: Wed, 30 Jul 2014 18:57:31 -0400

On Wed, 30 Jul 2014 12:39:03 -0400
John Cowan <johnwcowan@gmail.com> wrote:
[...] what I could see would be an XSLT feature to make it an
> error
> to match against a path that matches nothing.  There would need to be a way
> to turn this on and off selectively, of course.

A schema-aware XSLT 2 (or 3) processor may be able to provide a warning. It's easier to imagine how to implement such a warning in the simple child::* step a/b/c than with arbitrary expressions, though.

-- 
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/

• References:
  • Be careful writing XPath expressions when the XML could havenon-existent elements
    • From: "Costello, Roger L." <costello@mitre.org>
  • Re: Be careful writing XPath expressions when the XML couldhave non-existent elements
    • From: Wendell Piez <wapiez@wendellpiez.com>
  • Re: Be careful writing XPath expressions when the XML couldhave non-existent elements
    • From: John Cowan <johnwcowan@gmail.com>