How to test in Schematron: element value begins with

[Iwicka]

Hi,

I'm a beginner both in schematron and in xpath. I need to write an assertion testing that an element value always begins with a certain string if the attribute has a certain value:

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<communicationChannel communicationChannelCode="WEBSITE">http://www.oxygenxml.com</communicationChannel>

If the attribute is WEBSITE, the communicationChannel value must begin with http:// . Unfortunately, I cannot crack it, would be grateful for any help

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<sch:rule context="communicationChannel/@communicationChannelCode = 'WEBSITE'>

<sch:assert test="communicationChannel [text() ... />

</sch:rule>

That's where I'm stuck. Help please.

Ewa

[Jamil]

Hello. I took a quick look at what you are trying to do. I got it to work with the following changes. You will need to change this if you are using namespaces.

First, here is my sample XML document:

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<?xml version="1.0" encoding="UTF-8"?>

<?xml-model href="schematron_xml.sch" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>

<test>

    <communicationChannel communicationChannelCode="WEBSITE">http://www.oxygenxml.com</communicationChannel>

    <communicationChannel communicationChannelCode="WEBSITE">www.oxygenxml.com</communicationChannel>

</test>

Here is my schema:

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<?xml version="1.0" encoding="UTF-8"?>

<schema xmlns="http://purl.oclc.org/dsdl/schematron" 

        queryBinding="xslt2">

    <pattern>

        <rule context="/test/communicationChannel">

            <assert test="./@communicationChannelCode='WEBSITE' and starts-with(.,'http://')">communicationChannel element must start with 'http://'</assert>

        </rule>

    </pattern>

</schema>

[Jamil]

There was a bug in my schema above that I am fixing with this change:

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<?xml version="1.0" encoding="UTF-8"?>

<schema xmlns="http://purl.oclc.org/dsdl/schematron" 

        queryBinding="xslt2">

    <pattern>

        <rule context="/test/communicationChannel[@communicationChannelCode='WEBSITE']">

            <assert test="starts-with(.,'http://')">communicationChannel element must start with 'http://'</assert>

        </rule>

    </pattern>

</schema>

I found this issue after running a few more negative test scenarios. The issue was trying to combine two tests in a single assert tripped up the validation. Moving the attribute test to the rule's context resolved this.