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RE: <selector xpath="."/> doesn't work

• To: "'Markus Seibold'" <Markus.Seibold@g...>,<xml-dev@l...>
• Subject: RE: <selector xpath="."/> doesn't work
• From: "Michael Kay" <michael.h.kay@n...>
• Date: Tue, 17 Feb 2004 15:48:42 -0000
• Importance: Normal
• In-reply-to: <10446.1077025825@w...>
• Reply-to: <michael.h.kay@n...>

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@g...] 
> Sent: 17 February 2004 13:50
> To: xml-dev@l...
> Subject:  <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@g...
> Phone: +49 (941) 504 1009
> Mobile: +49 (171) 212 6869
> FAX: +49 (89) 1488 210457
> 
> 
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