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my broad understanding is:
W3C XML-Schema requires that each field expression return one and exactly
one value.
If we use | it may not be able to ensure this. I would assume that | is
not allowed to be part of field..
Hopefully others well versed with the spec well will answer..
regards - murali.
On Tue, 20 May 2003, Bill Riegel wrote:
>
> Using Xerces 2.4,
> My intension is to define a unique key from the PickData level. Should
> Keys are
> Pick/pickObsNo
> Pick/DataSrc/id or Pick/DataSrcRef/id
> Pick/VcPickSurfName/pickSurfName
>
>
> Parser fails; complains my constraint failed. If I have a DataSrc in one
> Pick and a DataSrcRef in the other.
>
> Parser Error: Not enough values specified for <key
> name="Pick_InHierarchy_Key_Definition"> identity constraint specified for
> element "PickData".
>
>
> If I have a DataSrc in both Picks, all is ok.
>
>
> Is the "|" an or ?
> Can I use the "|" in this way.
>
>
> <xs:schema xmlns:targetns=http://www.lgc.com/schema/OpenWorksData/2003
> <http://www.lgc.com/schema/OpenWorksData/2003> >
>
> <xs:element name="PickData" type="PickData_Type" minOccurs="0">
> <xs:key name="Pick_InHierarchy_Key_Definition">
> <xs:selector xpath="targetns:Pick"/>
> <xs:field xpath="targetns:pickObsNo"/>
> <xs:field
> xpath="targetns:DataSrc/targetns:id|targetns:DataSrcRef/targetns:id"/>
> <xs:field
> xpath="targetns:VcPickSurfName/targetns:pickSurfName"/>
> </xs:key>
> </xs:element>
> </xs:schema
>
> instance document
>
> <DataSet xmlns=http://www.lgc.com/schema/OpenWorksData/2003
> <http://www.lgc.com/schema/OpenWorksData/2003> >
>
> <PickData>
> <Pick>
> <pickObsNo>1</pickObsNo>
> <DataSrc relationship="pickBy">
> <id>LGC</id>
> </DataSrc>
> <VcPickSurfName relationship="pickName">
> <pickSurfName>C SAND</pickSurfName>
> </VcPickSurfName>
> </Pick>
> <Pick>
> <pickObsNo>1</pickObsNo>
> <DataSrcRef relationship="pickBy">
> <id>LGC</id>
> </DataSrcRef>
> <VcPickSurfName relationship="pickName">
> <pickSurfName>BASE-POROSITY-C SAND</pickSurfName>
> </VcPickSurfName>
> </Pick>
> </PickData>
> </DataSet>
>
> Bill Riegel
> LandMark Graphics
> 713-839-3388
>
>
|
