General component schema Schematron rules

This page concerns a proposal to extend the general component schema with a number of ​Schematron rules to specify certain restrictions that cannot be expressed using plain XSD.

Currently a version of this extended schema can be found as a part of the testing resources of the CMDValidate library of the ComponentRegistry:

• general component schema extended with schematron rules

Restrictions

Sibling components or elements should all have a different name

<sch:pattern id="component" name="CMD component group">
    <sch:rule context="CMD_Component|CMD_Element">
        <sch:assert test="empty(preceding-sibling::*[@name=current()/@name])">Sibling components or elements should all have a different name. Found multiple components or elements named '<sch:value-of select="@name"/>'!</sch:assert>
    </sch:rule>
</sch:pattern>

Attribute name shouldn't be 'ref' or 'ComponentId'

<sch:pattern id="attribute" name="CMD attribute">
    <sch:rule context="Attribute">
        <sch:assert test="empty(preceding-sibling::Attribute[Name=current()/Name])">All attributes in an attribute list should have a different name. Found multiple attributes named '<sch:value-of select="Name"/>'!</sch:assert>
        <sch:assert test="not(Name=('ref','ComponentId'))">Attribute name shouldn't be 'ref' or 'ComponentId', as these are used internally by CMD!</sch:assert>
    </sch:rule>
</sch:pattern>

All items in an enumeration should be different

<sch:pattern id="item" name="CMD enumeration item">
    <sch:rule context="item">
        <sch:assert test="empty(preceding-sibling::item[.=current()])">All items in an enumeration should be different. Found multiple items with value '<sch:value-of select="."/>'!</sch:assert>
    </sch:rule>
</sch:pattern>