PIs and Xspec

[Mark Shellenberger]

I'm hoping someone can point me to how to accomplish this task.

I wish to set a PI in an x:context and use it to determine whether an assert is true.  Currently I get an error regarding the context item of the axis for the PI.

I am using oXygen 24.0 and the built in Saxon EE 9.9.1.7.

Thank you.

Error: The context item for axis step root/descendant::processing-instruction(UseDebugMode) is absent

The xspec:
<x:description
    schematron="xspec-PI-test.sch"
    xmlns:x="http://www.jenitennison.com/xslt/xspec">
    <x:scenario
        label="In a document">
        <x:scenario
            label="when the foo element">
            <x:scenario
                label="is present and debug mode is true">
                <x:context>
                    <?useDebugMode test="true"?>
                    <root>
                        <foo />
                    </root>
                </x:context>
                <x:expect-not-assert
                    id="foo-element-exists"
                    label="that is correct" />
            </x:scenario>
            <x:scenario
                label="is absent and debug mode is true">
                <x:context>
                    <?useDebugMode test="true"?>
                    <root/>
                </x:context>
                <x:expect-assert
                    id="foo-element-exists"
                    label="that is incorrect" />
            </x:scenario>
        </x:scenario>
    </x:scenario>
</x:description>

The Schematron:
<sch:schema
    xmlns:sch="http://purl.oclc.org/dsdl/schematron">
   
    <sch:let
        name="use-debug-mode"
        value="substring-before(substring-after(//processing-instruction('UseDebugMode'), 'test=&quot;'), '&quot;')" />
   
    <sch:pattern id="root">
        <sch:rule
            context="root">
            <sch:assert
                diagnostics="foo-element-exists-diagnostic"
                id="foo-element-exists"
                role="fatal"
                test="$use-debug-mode='true'">The foo element child of root exists.</sch:assert>
        </sch:rule>
    </sch:pattern>
   
    <sch:diagnostics>
        <sch:diagnostic
            id="foo-element-exists-diagnostic">A foo element child of root does not exist.</sch:diagnostic>
    </sch:diagnostics>
</sch:schema>

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[Andrew Sales]

Hi Mark,

I think you you need to set the global context item by adding run-as='external' to x:description, as per [1].

If I do this, the test suite runs without error.

Regards,

Andrew

[1] https://github.com/xspec/xspec/wiki/Global-Context-Item

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[Mark Shellenberger]

Thank you.  That solves the problem.  I really appreciate the guidance.