xsd, how to...

[Sergey Poberezovskiy]

Hi,

I need to implement the following rule:
Element el_1 is defined as follows:

<xs:element name="el_1">
<xs:restriction base="xs:string">
<xs:enumeration value="value1"/>
<xs:enumeration value="value2"/>
<xs:enumeration value="value3"/>
</xs:restriction>
</xs:element>

If in validated XML document el_1 = value1 then I need elements 2 and 3 to
appear, otherwise - 4 and five. Something like:

<xs:choice>
<xs:sequence>
<xs:element name="el_1" with_value="value1"/>
<xs:element ref="el_2"/>
<xs:element ref="el_3"/>
</xs:sequence>
<xs:sequence>
<xs:element name="el_1" with_value!="value1"/>
<xs:element ref="el_4"/>
<xs:element ref="el_5"/>
</xs:sequence>
<xs:choice>

I know that the code above is not valid, what I do not know - how to make it
valid?

Any help is appreciated.

[Zafar Abbas]

Such a choice of sequences would violate the UPA rule from the XSD schema
spec. In this case e1_1 can not be present as a start element for two
sequence under the same choice, since the validator could get confusesd
which e1_1 to start with.

Co occurence constraints like this are not representable using XML Schema.
Consider schematron.
"Sergey Poberezovskiy" <Se*****************@discussions.microsoft.com> wrote
in message news:30**********************************@microsof t.com...

Hi,

I need to implement the following rule:
Element el_1 is defined as follows:

<xs:element name="el_1">
<xs:restriction base="xs:string">
<xs:enumeration value="value1"/>
<xs:enumeration value="value2"/>
<xs:enumeration value="value3"/>
</xs:restriction>
</xs:element>

If in validated XML document el_1 = value1 then I need elements 2 and 3 to
appear, otherwise - 4 and five. Something like:

<xs:choice>
<xs:sequence>
<xs:element name="el_1" with_value="value1"/>
<xs:element ref="el_2"/>
<xs:element ref="el_3"/>
</xs:sequence>
<xs:sequence>
<xs:element name="el_1" with_value!="value1"/>
<xs:element ref="el_4"/>
<xs:element ref="el_5"/>
</xs:sequence>
<xs:choice>

I know that the code above is not valid, what I do not know - how to make it valid?

Any help is appreciated.

[Stan Kitsis [MSFT]]

You cannot do this in XSD.
Your best option is probably to create distinct elements <value1> and
<value2> and then have a choice
<xs:choice>
<xs:sequence>
<xs:element name="value1">
<xs:element name="element2">
<xs:element name="element3">
<xs:sequence>
<xs:sequence>
<xs:element name="value2">
<xs:element name="element4">
<xs:element name="element5">
<xs:sequence>
</xs:choice>

--
Stan Kitsis
Program Manager, XML Technologies
Microsoft Corporation

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"Sergey Poberezovskiy" <Se*****************@discussions.microsoft.com> wrote
in message news:30**********************************@microsof t.com...

Hi,

I need to implement the following rule:
Element el_1 is defined as follows:

<xs:element name="el_1">
<xs:restriction base="xs:string">
<xs:enumeration value="value1"/>
<xs:enumeration value="value2"/>
<xs:enumeration value="value3"/>
</xs:restriction>
</xs:element>

If in validated XML document el_1 = value1 then I need elements 2 and 3 to
appear, otherwise - 4 and five. Something like:

<xs:choice>
<xs:sequence>
<xs:element name="el_1" with_value="value1"/>
<xs:element ref="el_2"/>
<xs:element ref="el_3"/>
</xs:sequence>
<xs:sequence>
<xs:element name="el_1" with_value!="value1"/>
<xs:element ref="el_4"/>
<xs:element ref="el_5"/>
</xs:sequence>
<xs:choice>

I know that the code above is not valid, what I do not know - how to make
it
valid?

Any help is appreciated.