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There is a widely held consensus in XML that element order is significant
but attribute order is not. I don't think this is explicitly stated in the
XML Recommendation itself, but it is certainly explicit in the Infoset, and
no parser would survive in the market without respecting this.
Remember that XML was originally designed for documents. The assumption that
the order of paragraphs in a text is significant is so deeply engrained that
no-one thought it needed saying.
Michael Kay
> -----Original Message-----
> From: Chen, Andrew . [mailto:ChenA@westinghouse.com]
> Sent: 16 November 2004 20:06
> To: xml-dev@lists.xml.org
> Subject: [xml-dev] Is order in XML guaranteed?
>
> Hi,
>
> If we have data items like this:
> <data>
> <d>5.0</d>
> <d>6.0</d>
> </data>
>
> We know for sure that in the application logic, we add 5.0,
> and then add
> 6.0, in a specific order. Since we are storing big amount of
> data (1-D
> array, usually 200 items), we want to MAKE SURE that data
> retrieved are in
> the right order we put in.
>
> The question is: does the XML spec, or parser spec guarantee
> these 2 items
> to be stored/retrieved in order ?
>
> If not, then do we have to do this:
>
> <data>
> <d seq="1">5.0</d>
> <d seq="2">6.0</d>
> </data>
>
>
> Thanks
> --
> Andrew H. Chen
> Engineering Computing & US BWR
> Westinghouse Electric Company
>
> (+1)-412-374-2316
>
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