W3C home > Mailing lists > Public > xmlschema-dev@w3.org > March 2007

Re: Attributes ordering

From: Nataraj Ramalingam <Nataraj.Ramalingam@aricent.com>
Date: Fri, 23 Mar 2007 00:18:41 +0530
To: "Pete Cordell" <petexmldev@tech-know-ware.com>
Cc: xmlschema-dev@w3.org
Message-ID: <OF8F06F085.5EDDC612-ON652572A6.00658AA5-652572A6.006755C8@flextronicssoftware.com>
Does the same hold good, if wildcard is used? 

In the same mentioned example, instead of b, let's assume that a wildcard 
appears. 
=========================================================================
<xs:complexType name="test">
        <xs:sequence>
                <xs:element name="a" type="xs:string"/>
                    <xs:any namespace="##other" processContents="lax" 
minOccurs="0" maxOccurs="unbounded"/>
                <xs:element name="c" type="xs:string"/>
        </xs:sequence>
</xs:complexType>

<xs:element name="test" type="test"/>
====================================================================================
In this case, can there be instances of following possibilities,
a,b,c 
a,c,b 
b,a,c 
a,c, b, b       where b is an element of some other namespace.

I see that in some of the IETF protocols, only whenever wildcard is used, 
the order of elements inside a sequence seems strange. It simply allows 
any possibilities, almost breaking the expected sequence behavior. 
COuld this be clarified?

Kind Regards,
Nataraj.





"Pete Cordell" <petexmldev@tech-know-ware.com> 
Sent by: xmlschema-dev-request@w3.org
03/22/2007 11:27 PM


To
Nataraj Ramalingam/CHE/HSS@HSS
cc
<xmlschema-dev@w3.org>
Subject
Re: Attributes ordering







Original Message From: "Nataraj Ramalingam" <Nataraj.Ramalingam@...>

>. I have one more doubt w.r.t ordering of elements.
> consider the following example.
> =====================================================
> <xs:complexType name="test">
>        <xs:sequence>
>                <xs:element name="a" type="xs:string"/>
>                <xs:element name="b" type="xs:string" minOccurs="0"/>
>                <xs:element name="c" type="xs:string"/>
>        </xs:sequence>
> </xs:complexType>
>
> <xs:element name="test" type="test"/>
> =====================================================
>
> Eventhough we use a sequence type here, does this mandate the order of
> elements in the instance to be only a,b,c.
> Or, since "b" is optional ( minOccurs=0 ), can it (should it, by any 
means
> )come after "c" in the instance? for example, can the ordering be a,c,b?


As it's a sequence, if b is present, then it must appear between a and c 
(i.e. the same order as specified in the definition).  (so a, b, c or just 

a, c.)

The xs:all construct for the order to be changed, but there are currently 
numerous restrictions on that.

HTH,

Pete.
--
=============================================
Pete Cordell
Tech-Know-Ware Ltd
for XML to C++ data binding visit
http://www.tech-know-ware.com/lmx/

http://www.codalogic.com/lmx/

=============================================






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Received on Thursday, 22 March 2007 18:48:57 UTC

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