XML Schema

[Troix]

Hello there

I have the following .xml code and the corresponding .xsd:

XML file:

Code: Select all

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

<lecturelist>

	xmlns="http://www.my-fh.com"

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

	xsi:schemaLocation="http://www.my-fh.com

	file:lecturelist1.xsd">

	<lecture>

		<name>maths</name>

		<semsester>1</semester>

	</lecture>

</lecturelist>

XSD file:

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

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

	targetNamespace="http://www.my-fh.com"

	xmlns:fh="http://www.my-fh.com"

>



<xs:element name="lecturelist">

	<xs:complexType>

		<xs:sequence>

			<xs:element ref="fh:lecture" maxOccurs="unbounded" />

		</xs:sequence>

	</xs:complexType>

</xs:element>



<xs:element name="lecture">

	<xs:complexType>

		<xs:sequence>

			<xs:element ref:"fh:name" />

			<xs:element ref:"fh:semester" />

		</xs:sequence>

	</xs:complexType>

</xs:element>



<xs:element name="title" type="xs:string"/>

<xs:element name="semester" type="xs:string"/>

Now I would like to extend the .xml file as following:

Extended XML file:

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

<lecturelist>

	xmlns="http://www.my-fh.com"

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

	xsi:schemaLocation="http://www.my-fh.com

	file:lecturelist1.xsd">

	<lecture>

		<name>maths</name>

		<semester>1</semester>

	</lecture>

	<teacher>

		<name>steinberg</name>

		<age>55</age>

	</teacher>

</lecturelist>

Evidently I have to add some lines to the .xsd file too.
I tried this:

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

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

	targetNamespace="http://www.my-fh.com"

	xmlns:fh="http://www.my-fh.com"

	xmlns:fb="http://www.my-fb.com"

>



<xs:element name="lecturelist">

	<xs:complexType>

		<xs:sequence>

			<xs:element ref="fh:lecture" maxOccurs="unbounded" />

			<xs:element ref="fb:teacher" maxOccurs="unbounded" />

		</xs:sequence>

	</xs:complexType>

</xs:element>



<xs:element name="lecture">

	<xs:complexType>

		<xs:sequence>

			<xs:element ref:"fh:name" />

			<xs:element ref:"fh:semester" />

		</xs:sequence>

	</xs:complexType>

</xs:element>



<xs:element name="teacher">

	<xs:complexType>

		<xs:sequence>

			<xs:element ref:"fb:name" />

			<xs:element ref:"fb:age" />

		</xs:sequence>

	</xs:complexType>

</xs:element>



<xs:element name="title" type="xs:string"/>

<xs:element name="semester" type="xs:string"/>

My Problem: How do I set up the new .xsd properly if I insist on remaining the structure as shown in the first .xsd?

Thank you for your help!

Kind regards,
Troix

[adrian]

Hi,

Stick to the same namespace (the schema target namespace) when working with a single XSD.

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

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

    targetNamespace="http://www.my-fh.com"

    xmlns:fh="http://www.my-fh.com">

    

    <xs:element name="lecturelist">

        <xs:complexType>

            <xs:sequence>

                <xs:element ref="fh:lecture" maxOccurs="unbounded" />

                <xs:element ref="fh:teacher" maxOccurs="unbounded" />

            </xs:sequence>

        </xs:complexType>

    </xs:element>

    

    <xs:element name="lecture">

        <xs:complexType>

            <xs:sequence>

                <xs:element ref="fh:name" />

                <xs:element ref="fh:semester" />

            </xs:sequence>

        </xs:complexType>

    </xs:element>

    

    <xs:element name="teacher">

        <xs:complexType>

            <xs:sequence>

                <xs:element ref="fh:name" />

                <xs:element ref="fh:age" />

            </xs:sequence>

        </xs:complexType>

    </xs:element>

    

    <xs:element name="title" type="xs:string"/>

    <xs:element name="semester" type="xs:string"/>

    <xs:element name="name" type="xs:string"/>

    <xs:element name="age" type="xs:string"/>

</xs:schema>

[Troix]

Hello adrian

Thank you for the reply.
So there is a "name" in "lecture" and "teacher".
If I were to say that the "name" in "lecture" is different to the "name" of "teacher" in terms of type how would I have to separate
them?

Thank you in advance,
Troix

[adrian]

If I were to say that the "name" in "lecture" is different to the "name" of "teacher" in terms of type how would I have to separate
them?

You can't declare two elements of the same name globally, so just declare the elements (or just one of them) locally (where used).

Code: Select all

    <xs:element name="teacher">

        <xs:complexType>

            <xs:sequence>

                <xs:element name="name" type="xs:string"/>

                <xs:element ref="fh:age" />

            </xs:sequence>

        </xs:complexType>

    </xs:element>

[Troix]

Thank you!

[adrian]

There's one other aspect that I forgot to mention. If you go with the local elements, you will also need to specify elementFormDefault="qualified" on the schema root, so that the local elements are placed in the target namespace. Otherwise, by default (unqualified), the local elements are in "no namespace".

Regards,
Adrian