Re: [xsl] Why does this XPath expression work fine when run

Thank you Graydon and Ken.

If I understand correctly, you are saying that the XPath expression in an XSD
1.1 assert may not reference comment fields. Correct?

Okay, I will switch back to XSD 1.0 and express assertions using Schematron.
The XPath works fine in Schematron:

<sch:rule context="xhtml:html/xhtml:head">
    <sch:assert
test="xhtml:style/following-sibling::comment()[1]/starts-with(., '[if gte mso
9]>&lt;xml>')">
        	Two comments may occur following the
 	style element; they must contain a
 	well-defined content
    </sch:assert>
</sch:rule>

/Roger

-----Original Message-----
From: G. Ken Holman g.ken.holman@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Monday, December 2, 2019 12:50 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx; xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: [EXT] Re: [xsl] Why does this XPath expression work fine when run
inOxygen but fails when used in an XSD 1.1 assert element?

The data model within which an assertion is evaluated is comprised only of the
element itself, not its siblings. You are looking at siblings.

Per the specification:

https://www.w3.org/TR/xmlschema11-1/#sec-cvc-assertion

I hope this helps.

. . . . . . Ken

At 2019-12-02 17:27 +0000, Costello, Roger L. costello@xxxxxxxxx wrote:
>Hi Folks,
>
>Below is a sample XHTML document. Immediately following the <style>
>element is a comment. I want to ensure that the value in the comment
>starts with this string:
>
>         [if gte mso 9]><xml>
>
>Using Oxygen, I ran the following XPath query (the <head> element is
>the context node):
>
>*[local-name() eq
>'style']/following-sibling::comment()[1]/starts-with(., '[if gte mso
>9]>&lt;xml>')
>
>The result of running the query is:
>
>         true()
>
>Perfect!
>
>Next, I put the query into an XML Schema 1.1 assert element:
>
><xs:assert test="*[local-name(.) eq
>'style']/following-sibling::comment()[1]/starts-with(., '[if gte mso
>9]>&lt;xml>')" />
>
>When I validated the XHTML document against the XML Schema, I got this
error:
>
>Assertion evaluation ('*[local-name(.) eq
>'style']/following-sibling::comment()[1]/starts-with(., '[if gte mso
>9]><xml>')') for element 'head' on schema type 'headType' did not succeed.
>
>Why does the XPath query work fine when run in Oxygen but fails when
>used in an XSD 1.1 assert element?  /Roger
>
>Here's the XHTML document:


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