Namespace Consolidation

by Paul Hepworth-4 :: Rate this Message:

Hi all,

I'm having trouble keeping my namespace declarations under control and was wondering whether there was any way to consolidate them all into the root element in my XML (setSaveAggressiveNamespaces(...) doesn't work)?

I have quite a complex schema, and certain templates stored in the DB for the different types of complex types. These templates are retrieved as a String (CLOB), and parsed using the MyObjectType.Factory.parse(...) method. At this point, and quite rightly, the appropriate namespaces are added.

Throughout the app and via numerous method calls and user interaction, I build up a large XML document. However, the result of which is that I have a mess of XML (albeit perfectly valid).

There are numerous re-declarations of namespaces, sometimes as a default namespace, and sometimes with a specific prefix. Although the XML is perfectly valid, it's far from standard, and all the namespace declarations end up taking up about as much as the actual data itself.

So I end up with something along the lines of:

<bobns:a xmlns:bobns="http://namespace.of.bob">

</b>

<bobns:d xmlns:bobns="http://namespace.of.bob">

<bobns:e>Fred</bobns:e>

</bobns:d>

</bobns:a>

What I'm after is to consolidate all the namespaces into the root element, and have all the rest of the xml to be qualified with their appropriate namespaces. Something like this:

<bobns:a xmlns:bobns="http://namespace.of.bob">

<bobns:b>

<bobns:c>Bob</bobns:c>

</bobns:b>

<bobns:d>

<bobns:e>Fred</bobns:e>

</bobns:d>

</bobns:a>

I've been experimenting with XMLOptions, and setSaveAggressiveNamespaces(...) etc, but nothing is giving me the result I need.

The closest I've come is to use setSaveImplicitNamespaces(...) which strips all the namespace declarations, and leaves the XML with the desired tidy namespace prefixes... only there are no namespace declarations and so the XML is ultimately invalid. It gives me something like this, which without the declaration of bobns is invalid:

<bobns:a>

<bobns:b>

<bobns:c>Bob</bobns:c>

</bobns:b>

<bobns:d>

<bobns:e>Fred</bobns:e>

</bobns:d>

</bobns:a>

Can anyone suggest the best approach for this?

Thanks

Paul

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