Oxygen XML Forum

Posted: **Fri Apr 15, 2016 1:10 am**

Hello,
I am trying to create a variable ($refValue) using XPATH to capture a value from an XML file that I ultimately want to validate.
Then I want to use that variable along with a variable created using the document() function (which references an external XML file), apended with an XPATH to capture a value from an external XML file to create another variable($qualifierValue) .
I then want to use the second variable ($qualifierValue) in validations in my report element.
I set all of the variables inside of the rule element, prior to the assert element.

When I display the contents of $qualifierValue in a report element, it apears empty
But if I display the documet()//XPATH used to set $qualifierValue, the expected value is present, namely "MY"

I saw one post, that appeared to say I can't use variables in XPATH to test attribute values, but I am not sure of that.

I will include my Schematron schema, the XML file that I am trying to validate, and the external XML files that I am trying to reference.
I use a report element to show the values of my variables. I will include that output too.

The assertion should be true, but it reports indicating that the test fails.
I've tried a lot of different approaches. There must be something about setting variables using XPATH and variables that I don't know.

Help please, what am I doing that is wrong?

First, here is the output of using the schema against the XML in OxygenXML 17.1

context = AMM;
registryItemValue = AMM;
refValue = MY-SHOP;
refPath = http://docs.my.company.com:8180/DDMFReg ... aProviders;
refXmlFilename = ;
qualifierValue1 = ; <== This is the value-of the $qualifierValue
qualifierValue2 = MY; <== This is the value of the "value" attribute that is supposed to set the $qualifierValue
path = http://docs.my.company.com:8180/DDMFReg ... umentTypes;
registryXmlFilename = ;

Here is the output of the assert that also comes out when I run the schema:
This DDMF XML references a / Document/ documentType of: AMM which does not exist in the registry.

Here is the Schematron schema:

Code: Select all


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

<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">

    <sch:ns uri="http://www.w3.org/2001/XMLSchema-instance" prefix="isx"/>

    <sch:pattern id="validateDocumentType">

        <sch:rule context="//Document/documentType">

            <sch:let name="registryItemValue" value="normalize-space(.)"/>

            <sch:let name="refValue" value="//Document/dataProvider"/>

            <sch:let name="refPath" value="'http://docs.my.company.com:8180/DDMFRegistryService/registry/XML/dataProviders'"/>

            <sch:let name="refXmlFilename" value="document($refPath)"/>

            <sch:let name="qualifierValue" value="$refXmlFilename//registry/entry/item[@key='dataProvider' and @value='$refValue']/../item[@key='ns']/@value"/>

            <sch:let name="path"  value="'http://docs.my.company.com:8180/DDMFRegistryService/registry/XML/documentTypes'"/>

            <sch:let name="registryXmlFilename" value="document($path)"/>

            <!-- debugging test -->

            <sch:report role="warn" test="true()">

                <!-- change this to true() for debugging --> 

                context = <sch:value-of select="//Document/documentType"/>; 

                registryItemValue = <sch:value-of select="$registryItemValue"/>; 

                refValue = <sch:value-of select="$refValue"/>;

                refPath = <sch:value-of select="$refPath"/>; 

                refXmlFilename = <sch:value-of select="$refXmlFilename"/>;

                qualifierValue1 = <sch:value-of select="$qualifierValue"/>;

                qualifierValue2 = <sch:value-of select="$refXmlFilename//registry/entry/item[@key='dataProvider' and @value='MY-SHOP']/../item[@key='ns']/@value"/>;

                path = <sch:value-of select="$path"/>; 

                registryXmlFilename = <sch:value-of select="$refXmlFilename"/>;

            </sch:report>

            <sch:assert role="error"

                test="$registryXmlFilename//registry/entry/item[

                @key=documentType 

                and @value = $registryItemValue]

                /../item[@key='ns']

                /@value=$qualifierValue" >

                This DDMF XML references a 

                <sch:value-of select="name(../..)"/>/

                <sch:value-of select="name(..)"/>/

                <sch:value-of select="name()"/> of: 

                <sch:value-of select="."/> which does

                not exist in the registry. 

            </sch:assert>

        </sch:rule>

    </sch:pattern>

</sch:schema>

Here is one external XML file (associated with the $refPath variable):
http://docs.my.company.com:8180/DDMFReg ... aProviders

Code: Select all


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

<registry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

xsi:noNamespaceSchemaLocation="http://dast.my.company.com/assets/registry/schema/1-0/registry.xsd" 

schemaVersion="1.0" identity="dataProviders" 

modified="2016-02-05T21:19:00Z">

  <entry status="stable" modified="2016-02-04T21:36:00Z" >

    <item key="ns" value="MY" />

    <item key="dataProvider" value="MY-SHOP" />

  </entry>

  <entry status="stable" modified="2016-02-04T21:36:00Z" >

    <item key="ns" value="YOUR" />

    <item key="dataProvider" value="YOUR-SHOP" />

  </entry>

</registry>

Here is the second external XML file (associated with the $path variable):
http://docs.my.Company.com:8180/DDMFReg ... umentTypes

Code: Select all


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

<registry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

xsi:noNamespaceSchemaLocation="http://dast.my.company.com/assets/registry/schema/1-0/registry.xsd" 

schemaVersion="1.0" identity="documentTypes" 

modified="2016-04-13T20:35:42Z">

  <entry status="unstable" modified="2015-07-07T17:30:00Z" >

    <item key="ns" value="YOUR" />

    <item key="documentType" value="AMM" />

  </entry>

  <entry status="stable" modified="2015-07-07T17:30:00Z" >

    <item key="ns" value="MY" />

    <item key="documentType" value="AMM" />

  </entry>

</registry>

Here is the XML file that I am trying to validate:

Code: Select all


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

<Document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:noNamespaceSchemaLocation="http://www.my.company.com/ddmf/ddmf.xsd"

  schemaVersion="3.0">

  <status>TEST</status>

  <packageTimestamp>2015-03-11T12:00:00Z</packageTimestamp>

  <dataProvider>MY-SHOP</dataProvider>

  <documentType>AMM</documentType>

</Document>

Posted: **Fri Apr 15, 2016 10:42 am**

Hello,

I corrected your Schematron schema, you can find it below. You made some small mistakes:
- in the 'qualifierValue' variable the $refValue should not be in apostrophes, instead of @value='$refValue' use @value=$refValue.
- in the assert you need to use apostrophes for documentType, instead of @key=documentType use @key='documentType'.

Code: Select all


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

<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">

    <sch:ns uri="http://www.w3.org/2001/XMLSchema-instance" prefix="isx"/>

    <sch:pattern id="validateDocumentType">

        <sch:rule context="//Document/documentType">

            <sch:let name="registryItemValue" value="normalize-space(.)"/>

            <sch:let name="refValue" value="//Document/dataProvider"/>

            <sch:let name="refPath" value="'http://docs.my.company.com:8180/DDMFRegistryService/registry/XML/dataProviders'"/>

            <sch:let name="refXmlFilename" value="document($refPath)"/>

            <sch:let name="qualifierValue" value="$refXmlFilename//registry/entry/item[@key='dataProvider' and @value=$refValue]/../item[@key='ns']/@value"/>

            <sch:let name="path"  value="'http://docs.my.company.com:8180/DDMFRegistryService/registry/XML/documentTypes'"/>

            <sch:let name="registryXmlFilename" value="document($path)"/>

            <!-- debugging test -->

            <sch:report role="warn" test="true()">

                <!-- change this to true() for debugging --> 

                context = <sch:value-of select="//Document/documentType"/>; 

                registryItemValue = <sch:value-of select="$registryItemValue"/>; 

                refValue = <sch:value-of select="$refValue"/>;

                refPath = <sch:value-of select="$refPath"/>;

                refXmlFilename = <sch:value-of select="$refXmlFilename"/>;

                qualifierValue1 = <sch:value-of select="$qualifierValue"/>;

                qualifierValue2 = <sch:value-of select="$refXmlFilename//registry/entry/item[@key='dataProvider' and @value='MY-SHOP']/../item[@key='ns']/@value"/>;

                path = <sch:value-of select="$path"/>; 

                registryXmlFilename = <sch:value-of select="$refXmlFilename"/>;

            </sch:report>

            <sch:assert role="error"

                test="$registryXmlFilename//registry/entry/item[

                @key='documentType' 

                and @value = $registryItemValue]

                /../item[@key='ns']

                /@value=$qualifierValue" >

                This DDMF XML references a 

                <sch:value-of select="name(../..)"/>/

                <sch:value-of select="name(..)"/>/

                <sch:value-of select="name()"/> of: 

                <sch:value-of select="."/> which does

                not exist in the registry. 

            </sch:assert>

        </sch:rule>

    </sch:pattern>

</sch:schema>

Best Regards,
Octavian

Posted: **Mon Apr 18, 2016 8:17 pm**

Thank-you Octavian,

I have now resolved all of my issues (I only documented one) based on your corrections and confidence that what I was trying to do was in fact possible.

I am particularly pleased to have this schema working. We have many complex validations which will involve multiple elements and multiple registry table look-up values. Thanks for the confidence to persevere!

Regards,

Rich Wood

Oxygen XML Forum

Schematron - using variables in XPATH

Schematron - using variables in XPATH

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Re: Schematron - using variables in XPATH