CODEWITHSUNDEEP
xmlxsdxsd-validation
scher
scher

Reputation: 1923

XSD: Sequence with some choice

I have a sequence of different types, for some of them I want to ensure, that at most one of these element is used. Here are some examples: <Synchronisation> and <Link> may occure one time. There are Elements like <TextBox>, <Label>, <CheckBox>, etc. From these elements there is at most one allowed. Either <TextBox>, <Label> or <CheckBox>.

Valid XMLs:

<Property>
    <Synchronisation/>
</Property>

<Property>
    <Synchronisation/>
    <Link/>
</Property>

<Property>
    <Synchronisation/>
    <Link/>
    <TextBox/>
</Property>

<Property>
    <Synchronisation/>
    <Link/>
    <Label/>
</Property>

Invalid XML, as <TextBox> and <Label> occures.

<Property>
    <Synchronisation/>
    <Link/>
    <Label/>
    <TextBox/>
</Property>

I tried to do the xsd like this, but it does not work:

<xsd:complexType name="PropertyType">
    <xsd:sequence minOccurs="0">
        <xsd:element minOccurs="0" maxOccurs="1" name="Synchronisation" type="SynchronisationType"/>
        <xsd:element minOccurs="0" maxOccurs="1" name="Links" type="LinksType"/>
        <xsd:element minOccurs="0" maxOccurs="1" ref="ElementType"/>
    </xsd:sequence>
</xsd:complexType>

<xsd:complexType name="ElementType">
    <xsd:choice>
        <xsd:element name="TextBox" type="TextBoxType"/>
        <xsd:element name="Label" type="TextBoxType"/>
        <xsd:element name="CheckBox" type="TextBoxType"/>
    </xsd:choice>
</xsd:complexType>

Upvotes: 0

Views: 183

Answers (1)

scher
scher

Reputation: 1923

Finally i found a solution for the problem:

<xsd:complexType name="PropertyType">
    <xsd:sequence minOccurs="0">
        <xsd:element minOccurs="0" maxOccurs="1" name="Synchronisation" type="SynchronisationType"/>
        <xsd:element minOccurs="0" maxOccurs="1" name="Links" type="LinksType"/>
        <xsd:choice minOccurs="0" maxOccurs="1"/>
            <xsd:element minOccurs="0" maxOccurs="1" name="TextBox" type="TextBoxType" /> 
            <xsd:element minOccurs="0" maxOccurs="1" name="Label" type="LabelType" /> 
            <xsd:element minOccurs="0" maxOccurs="1" name="CheckBox" type="CheckBoxType" /> 
        </xsd:choice>
    </xsd:sequence>
</xsd:complexType>

Upvotes: 1

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