XSD - Elements in any order and count (XML validated by XERCES using XSD)
I have problem with XML schema. I need inside one element elements of three types but without any other restriction, followed by exactly one occurrence of element output
:
<command path="app.exe" workingDir="/usr/local/bin">
<param name="--name" assign="=">anyName</param>
<switch name="--verbose"/>
<param name="--config">/etc/app/conf.txt</param>
<param name="--overriding">~/app/conf.txt</param>
<switch name="-d"/>
<param name="--report" assign="=">~/app/report.txt</param>
<param name="--template">~/app/templates/default.tt</param>
<string>../t/${testName}/log.txt</string>
<output>
<out path="stdout.txt"/>
<err path="stderr.txt"/>
</output>
</command>
I can use just sequence
, all
or choice
, but no one of them satisfies my requirement. Sequence - any number of times in exact order. All - zero or one times in any order. Choice - only one of them. I have found one solution on this web, but it does not work with Xerces. I try this:
<xs:complexType name="commandType">
<xs:sequence>
<xs:group ref="gupa"/>
<xs:element name="output" type="outputType" minOccurs="1" maxOccurs="1"/>
</xs:sequence>
<xs:attribute name="path" use="required" type="value"/>
<xs:attribute name="workingDir" use="required" type="value"/>
</xs:complexType>
<xs:group name="gupa">
<xs:choice>
<xs:element name="env" type="pair" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="param" type="paramType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="switch" type="switchType" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="string" type="value" minOccurs="0" maxOccurs="unbounded"/>
</xs:choice>
</xs:group>
But I get the error: Invalid content was found starting with element 'switch'. One of '{param, output}' is expected. There is a trick.
If
maxOccurs="unbounded"
is moved from elements to elementchoice
in schema, then can any of elements appear in any order in any number of times.
However, when I do it, I get the error: Attribute 'maxOccurs' cannot appear in element 'choice'
I cruis开发者_Python百科ed cross the Internet, but I still haven't found what I'm looking for.
You can put the three element types in a choice and then put the choice in a sequence in another sequence.
<xs:group name="mygr">
<xs:choice>
<xs:element name="string"></xs:element>
<xs:element name="param"></xs:element>
<xs:element name="switch"></xs:element>
<xs:element name="env"></xs:element>
</xs:choice>
</xs:group>
<xs:element name="root">
<xs:complexType>
<xs:sequence >
<xs:sequence minOccurs="1" maxOccurs="unbounded">
<xs:group ref="mygr"/>
</xs:sequence>
<xs:element name="output"></xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
Which is what you already had, but the output is taken a level higher.
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