OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]
Re: [xml-dev] Be careful writing XPath expressions when the XML couldhave non-existent elements

On Wed, Jul 30, 2014 at 10:49 AM, Wendell Piez <wapiez@wendellpiez.com> wrote:

But in the general case, I want select //div[@class='section'] to
return every div that has a 'class' attribute whose value is
'section', and none whose @class is something else, or not there at
all. So "@class='section'" returns false() when @class returns an
empty sequence (or node set in XPath 1.0.)

What do you want it to return: a run-time error?

Clearly not.  But 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.

Separation of concerns suggests a Schematron schema would do better, though.

GMail doesn't have rotating .sigs, but you can see mine at http://www.ccil.org/~cowan/signatures

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]

News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 1993-2007 XML.org. This site is hosted by OASIS