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Start with an English sentence: "every building on the campus can be
referred to by its buildingCode". Then define a key on the campus
element with a "selector" that identifies the buiding element, and a
"field" that identifies the buildingCode of that building.
Using a selector of "." means "every building in the building can be
referred to..." which doesn't make much sense.
Michael Kay
> -----Original Message-----
> From: Markus Seibold [mailto:Markus.Seibold@gmx.net]
> Sent: 17 February 2004 13:50
> To: xml-dev@lists.xml.org
> Subject: [xml-dev] <selector xpath="."/> doesn't work
>
>
> Hello,
> I am using <key> and <keyref> in my XML Schema.
>
> When I declare the <key> element globally
> ('AdminUnitKey_Global'), the key's are set appropriatly.
>
> When I want to declare the <key> element locally
> ('AdminUnitKey_Local'; by using the expression <selector
> xpath="."/ under the <AdminUnit> element) the key is not set
> and the schema does not validate because the <keyref> fails
> to refer to some key.
>
> I thought that xpath="." refers to the current element where
> the xpath expression is set? Why doesn't that work with <key>?
>
> Thanks, Markus
>
> <?xml version="1.0" encoding="UTF-8"?>
> <schema targetNamespace="http://www.opentourism.org";
> xmlns="http://www.w3.org/2001/XMLSchema";
> xmlns:utour="http://www.opentourism.org";
> elementFormDefault="unqualified">
> <element name="Country">
> <complexType>
> <sequence>
> <element name="CountryID"
> type="string"/>
> <element name="AdminUnit"
> minOccurs="0" maxOccurs="unbounded">
> <complexType>
> <sequence>
>
> <element name="AdminUnitName" type="string"/>
>
> <element name="SubAdminUnits" minOccurs="0" maxOccurs="unbounded">
>
> <complexType>
>
> <sequence>
>
> <element name="SubAdminUnitName" type="string"/>
>
> </sequence>
>
> </complexType>
> </element>
> </sequence>
> </complexType>
> <!--
> <key name="AdminUnitKey_Local">
> <selector xpath="."/>
> <field
> xpath="AdminUnitName"/>
> </key>
> <keyref
> name="AdminUnitRef_Local" refer="utour:AdminUnitKey_Local">
> <selector
> xpath="SubAdminUnits"/>
> <field
> xpath="SubAdminUnitName"/>
> </keyref>
> -->
> </element>
> </sequence>
> </complexType>
> <key name="AdminUnitKey_Global">
> <selector xpath="AdminUnit"/>
> <field xpath="AdminUnitName"/>
> </key>
> <keyref name="AdminUnitRef_Global"
> refer="utour:AdminUnitKey_Global">
> <selector xpath="AdminUnit/SubAdminUnits"/>
> <field xpath="SubAdminUnitName"/>
> </keyref>
> </element>
> </schema>
>
> --
> Markus Seibold
> ------------------------------
> Krebsgasse 6
> D-93047 Regensburg
> Germany
> ------------------------------
> Email: markus.seibold@gmx.net
> Phone: +49 (941) 504 1009
> Mobile: +49 (171) 212 6869
> FAX: +49 (89) 1488 210457
>
>
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