Oxygen XML Forum

Posted: **Tue Feb 24, 2009 10:53 pm**

Hi All,

Suppose we have a schema root-a-b.xsd that validates documents like:


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

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

    xsi:noNamespaceSchemaLocation="root-a-b.xsd">

    <a>

        <b/>

    </a>

    <a>

        <b/>

        <b/>

    </a>

</root>

Now I'd like to define a schema interlace.xsd that should validate documents such as the following:

Code: Select all


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

<in:interlace xmlns:in="myURI"

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

    xsi:schemaLocation="myURI interlace.xsd">

    <root>

        <!-- Loops on both levels -->

        <in:loop>

            <a>

                <in:loop>

                    <b/>

                </in:loop>

            </a>

        </in:loop>

        

        <!-- Internal loop only -->

        <a>

            <in:loop>

                <b/>

            </in:loop>

        </a>

        

        <!-- External loop only -->

        <in:loop>

            <a>

                <b/>

            </a>

        </in:loop>

    </root>

</in:interlace>

Basically, I'd like interlace.xsd to validate documents that:

Have in:interlace as their document node
Do not have any empty in:loop element
Are valid root-a-b.xsd documents once all in: elements are skipped

I could probably write an XSLT script to generate interlace.xsd from root-a-b.xsd, but I was wondering if there would be a way to do that in such a way that root-a-b.xsd is only referenced, and so that a modification in this schema (say, now <b> elements can contain <c> elements) would be automatically reflected, without having to regenerate interlace.xsd. Again, I'm not set on xsd schemas -- if NG or another schema model would work better for that, I'm sold.

Any pointers?

Thanks!

Posted: **Mon Jun 01, 2009 5:33 pm**

Hi,

I know this comes late but here it is!
You can use an NVDL script to perform basically 2 validations:
- one validates the in:interlace and all the in:loop together with the in:loop content against the interlace.xsd schema
- the other validates the elements from no namespace against the root-a-b.xsd schema:

Code: Select all


<rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"

xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">

  <namespace ns="http://myURI">

    <validate schema="interlace.xsd">

      <mode>

        <namespace ns="">

          <validate schema="root-a-b.xsd">

            <mode>

              <namespace ns=""><attach/></namespace>

              <anyNamespace><unwrap/></anyNamespace>

            </mode>

          </validate>

          <unwrap>

            <mode>

              <anyNamespace><attach/></anyNamespace>

            </mode>

          </unwrap>

        </namespace>

        <namespace ns="http://myURI">

          <attach/>

        </namespace>

      </mode>

    </validate>

  </namespace>

</rules>

rppt-a-b.xsd

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

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"

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

  <xs:element name="root">

    <xs:complexType>

      <xs:sequence>

        <xs:element maxOccurs="unbounded" ref="a"/>

      </xs:sequence>

    </xs:complexType>

  </xs:element>

  <xs:element name="a">

    <xs:complexType>

      <xs:sequence>

        <xs:element maxOccurs="unbounded" ref="b"/>

      </xs:sequence>

    </xs:complexType>

  </xs:element>

  <xs:element name="b">

    <xs:complexType/>

  </xs:element>

</xs:schema>

interlace.xsd

Code: Select all


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

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"

  targetNamespace="http://myURI" xmlns:in="http://myURI"

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

  <xs:element name="interlace">

    <xs:complexType>

      <xs:sequence maxOccurs="unbounded" minOccurs="0">

        <xs:element ref="in:loop"/>

      </xs:sequence>

    </xs:complexType>

  </xs:element>

  <xs:element name="loop">

    <xs:complexType>

      <xs:choice maxOccurs="unbounded">

        <xs:element ref="in:loop"/>

        <xs:any namespace="##local" processContents="lax"/>

      </xs:choice>

    </xs:complexType>

  </xs:element>

</xs:schema>

sample xml

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

<?oxygen NVDLSchema="test.nvdl"?>

<in:interlace xmlns:in="http://myURI">

  <root>

    <!-- Loops on both levels -->

    <in:loop>

      <a>

        <in:loop>

          <b/>

        </in:loop>

      </a>

    </in:loop>

    

    <!-- Internal loop only -->

    <a>

      <in:loop>

        

        <b/>

      </in:loop>

    </a>

    

    <!-- External loop only -->

    <in:loop>

      <a>

        <b/>

      </a>

    </in:loop>

  </root>

</in:interlace>

Best Regards,
George

Oxygen XML Forum

A schema for interlacing elements from different schemas

A schema for interlacing elements from different schemas

Re: A schema for interlacing elements from different schemas