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RE: How ensure group elements exist and in any order

From: Michael Kay <mike@saxonica.com>
Date: Wed, 6 Oct 2004 16:52:13 +0100
To: "'Gary Fix'" <gary.fix@win-na.com>
Cc: <xmlschema-dev@w3.org>
Message-Id: <E1CFE5R-0007OO-00@ukmail1.eechost.net>

(Back on-list: the whole point of having a public list is so that others can
read the questions and answers and add their own observations, like telling
me I'm completely wrong...).

There's a restriction on xsd:all, namely it that it has to make up the
entire content model of a complex type. I think your group definition as
written is OK in itself, but there are restrictions on where and how it can
be used.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Gary Fix [mailto:gary.fix@win-na.com] 
> Sent: 06 October 2004 16:07
> To: Michael Kay
> Subject: RE: How ensure group elements exist and in any order
> 
> Hi Michael,
> I tried using xsd:all in the group definition and found this 
> will NOT work:
> <xsd:group name="VINGroup">
> 	<xsd:all>
> 		<xsd:element name="Body" type="xsd:string"/>
> 		<xsd:element name="Make" type="xsd:string"/>
> 		<xsd:element name="Model" type="xsd:string"/>
> 	</xsd:all>
> </xsd:group>
> Should I be placing the "all" somewhere else?
> thanks!
> 
> -----Original Message-----
> From: Michael Kay [mailto:mike@saxonica.com]
> Sent: Wednesday, October 06, 2004 8:00 AM
> To: Gary Fix; xmlschema-dev@w3.org
> Subject: RE: How ensure group elements exist and in any order
> 
> 
> Provided each element can appear at most once, you can do 
> this with xsd:all.
> The elements can be optional or mandatory, but not repeated 
> (rather like
> attributes, really).
> 
> Michael Kay
> http://www.saxonica.com/
> 
> > -----Original Message-----
> > From: xmlschema-dev-request@w3.org 
> > [mailto:xmlschema-dev-request@w3.org] On Behalf Of Gary Fix
> > Sent: 06 October 2004 15:18
> > To: xmlschema-dev@w3.org
> > Subject: How ensure group elements exist and in any order
> > 
> > 
> > Hi,
> > When a group of elements ("VINGroup") is present in my xslt 
> > file, I want to confirm that all members of the group are 
> > present but they may be in any order (sequence)...
> > Is there a way do this in the xsd?
> > This is what I have so far but it forces the VINGroup 
> > elements to be in a specific order...
> > thanks in advance,
> > gary...
> > 
> > <xsd:element name="Vehicle">
> > 	<xsd:complexType>
> > 		<xsd:sequence>
> > 			<xsd:choice minOccurs="1" maxOccurs="1">
> > 				<!-- Case #1: VIN & 
> > Body/Make/Model Group Supplied -->
> > 				<xsd:sequence>
> > 					<xsd:element 
> > ref="VehicleIdentificationNumber"/>
> > 					<xsd:group 
> > ref="VINGroup" minOccurs="1" maxOccurs="1"/>
> > 				</xsd:sequence>
> > 				<!-- Case #2: VIN Only Supplied -->
> > 				<xsd:sequence>
> > 					<xsd:element 
> > ref="VehicleIdentificationNumber" minOccurs="1"/>
> > 				</xsd:sequence>
> > 				<!-- Case #3: Body/Make/Model 
> > Group Only Supplied -->
> > 				<xsd:sequence>
> > 					<xsd:group 
> > ref="VINGroup" minOccurs="1" maxOccurs="1"/>
> > 				</xsd:sequence>
> > 			</xsd:choice>
> > 		</xsd:sequence>
> > 	</xsd:complexType>
> > </xsd:element>
> > <xsd:group name="VINGroup">
> > 	<xsd:sequence>
> > 		<xsd:element name="Body" type="xsd:string"/>
> > 		<xsd:element name="Make" type="xsd:string"/>
> > 		<xsd:element name="Model" type="xsd:string"/>
> > 	</xsd:sequence>
> > </xsd:group>
> > 
> > 
> > 
> 
> 
Received on Wednesday, 6 October 2004 15:52:17 UTC

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