Schematron & Check for Unique attribute

[jjhernan]

...Still new to schematron... thank you in advance for your help...

I have a source XML document where I need to assert that an attribute is unique in a set of elements. I built a rule to enforce this, but its not working. I searched online and tried to follow some examples I found, but still no dice...

This is my source XML:

Code: Select all

<TreeView>

	<DataSets>

		<DataSet Name="Folders">

			<Property Name="Folder" Value="101">

				<Property Name="Name" Value="Cars"/>

				<Property Name="Role" Value="a"/>

			</Property>

			<Property Name="Folder" Value="102">

				<Property Name="Name" Value="Boats"/>

				<Property Name="Role" Value="b"/>

			</Property>

			<Property Name="Folder" Value="103">

				<Property Name="Name" Value="Bikes"/>

				<Property Name="Role" Value="c"/>

			</Property>

			<Property Name="Folder" Value="104">

				<Property Name="Name" Value="Trains"/>

				<Property Name="Role" Value="d"/>

			</Property>

		<DataSet>

	</DataSets>

</TreeView>

This is my rule:

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<sch:pattern id="Check_Unique_Roles">    

	<sch:rule context="//DataSets/DataSet[@Name='Folders']">

		<sch:assert test=" count(Property/Property[@Name='Role']) = 

			count(Property/Property[@Name='Role' and not(@Value=preceding-sibling/Property[@Name='Role']/@Value)])">

				Roles for all Folders must be unique. 

		</sch:assert>

	</sch:rule>

</sch:pattern>

[jjhernan]

Just came up with a working solution...

Code: Select all

    <xsl:key name="getAllRoles" match="//DataSets/DataSet[@Name='Folders']/Property/Property[@Name='Role']" use="@Value"/>



    <sch:pattern id="CheckOrganization_UniqueRole">    

        <sch:rule context="//DataSets/DataSet[@Name='Folders']/Property">

            <sch:assert test="count(key('getAllRoles',Property/@Value)) = 1" role="warning">

                Warning: Roles for Folders should be unique. 

            </sch:assert>

        </sch:rule>

    </sch:pattern>