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RE: Semantic equivalence of xml documents

• To: "Yves Langisch" <lists@l...>
• Subject: RE: Semantic equivalence of xml documents
• From: "Paul Spencer" <xml-dev@b...>
• Date: Mon, 26 Sep 2005 14:30:33 +0100
• Cc: <xml-dev@l...>
• Importance: Normal
• In-reply-to: <1127738320.6925.200.camel@k...>

> -----Original Message-----
> From: Yves Langisch [mailto:lists@l...]

> okay, to talk about semantic equivalence in general is delicate. In our
> case we have the assumption that if repeteable elements occurs, the
> order is not relevant. We just want to check the presence of data on the
> same level. At the moment we have a stylesheet which orders repeatable
> elements (can be of a complex type) by, for example, the content of the
> first sub-element. When we do this with the two input documents we can
> compare the two output documents by a string comparison (apart from
> possible whitespaces).
>
> Maybe there is a better solution?

That sounds a reasonable approach.

You probably need some sort of canonicalisation for your string comparison,
or there are plenty of "XML aware" comparison tools. DeltaXML is one, or XML
Spy has a tool built in.

Paul Spencer

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