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<xs:element name="Kunde" type="tKunde"/>
<xs:complexType name="tKunde">
<xs:union memberTypes="tPerson tStudent"></xs:union>
</xs:complexType>
<xs:complexType name="tPerson">
<xs:sequence>
<xs:element name="Vorname" type="xs:string"/>
<xs:element name="Nachname" type="xs:string"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="tStudent">
<xs:complexContent>
<xs:extension base="tPerson">
<xs:sequence>
<xs:element name="Matrikelnummer" type="xs:int" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
Thats what it should look like. The task is to derive a Student from Person and then make it possible to use one of the two types for the element Kunde.
This seems to be invalid.
447
Specifies the name of a built-in data type, a simpleType element, or a complexType element. any attributes. Optional. Specifies any other attributes with non-schema namespace.
xs:simpleType define a value type, this value can then be used within an element or attribute (so you could define an double with 2 decimal places or a string in the format of an IP address). xs:complexTypes describe the structure of an element. It can define its textual value, its attributes and its child elements.
<xs:element name="name" type="xs:string"/> <xs:element name="navn" substitutionGroup="name"/> <xs:complexType name="custinfo"> <xs:sequence> <xs:element ref="name"/>
<xs:restriction base="xs:positiveInteger"> <xs:maxInclusive value="42"/> </xs:restriction> </xs:simpleType> <xs:simpleType name="sizebystring">
You can't use xs:union for this. You can either use xs:choice, or put the elements in a substitution group so any of them can appear in place of the element at the head of the substitution group.
83
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