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For data modeling purpose, I want to cascade 2
schemas as described in the following example:
1) a schema that describes a
object class structure: here a mib is componed of classes that include
its name and its position in an inheritance tree.
<?xml version='1.0'?>
<!-- schema_schema_test_2.xsd
-->
<Schema
xmlns="urn:schemas-microsoft-com:xml-data"
xmlns:dt="urn:schemas-microsoft-com:datatypes">
<AttributeType name="name"
dt:type="string"/>
<AttributeType name="derivedFrom"
dt:type="string"/>
<ElementType
name="class">
<attribute
type="name"/>
<attribute
type="derivedFrom"/>
</ElementType>
<ElementType
name="mib">
<element
type="class"/>
</ElementType>
</Schema>
2) a schema that uses the class
structure described in the prior schema and define the class "equipment" that
derives from the top class and contains 1 attribute called
"userLabel":
<?xml version='1.0'?>
<!-- schema_test_2.xsd -->
<mib
xmlns="x-schema:schema_schema_test_2.xsd"
xmlns:dt="urn:schemas-microsoft-com:xml-data">
<dt:AttributeType name="UserLabel"
type="string"/>
<moc name="equipment"
derivedFrom="top">
<dt:attribute
type="UserLabel" name="userLabel"/>
</moc>
<dt:ElementType
name="model">
<dt:element
type="equipment"/>
</dt:ElementType>
</mib>
3) then the instance document has
the following aspect: the model contains 2 equipment class called Fr_It 2_1 and
Fr_Br 3_0
<?xml version='1.0'?>
<!-- data_test_2.xml -->
<model xmlns="x-schema:schema_test_2.xsd">
<equipment userlabel="router Fr_It
2_1"/>
<equipment
userlabel="router Fr_Br 3_0"/>
</model>
? This example doesn t work: the
second schema is valid against the first schema, but there is an error while
checking the well-formness of the instance document. I am a little bit confused
since a simpler example with only one schema works well. Am I missing something?
Thanks,
J-Daniel.
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