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

• To: <michael.h.kay@n...>
• Subject: RE: <selector xpath="."/> doesn't work
• From: "Markus Seibold" <Markus.Seibold@g...>
• Date: Thu, 19 Feb 2004 12:43:00 +0100 (MET)
• Cc: xml-dev@l...
• References: <000201c3f56d$84ef9500$6401a8c0@pcukmka>

Michael,
thanks, I see what you are saying and it sounds rational. But at the same
time I have seen quite a few examples in books about XML Schema that are using
the selector xpath="." element. 
Can it be that it works with keyref but not with key? I just can't believe
that all the books are wrong ...

Markus

> 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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> 

-- 
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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  • RE: <selector xpath="."/> doesn't work
    • From: "Michael Kay" <michael.h.kay@n...>

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