OSB: How to recreate reusable XQuery functions

OSB's XQuery implementation does not support the XQuery "module" which allows the creation of a function library so how can OSB provide function re-use?
I know you can create XQuery transformations that can be called but these always need a "body" that makes a specific call so I'm finiding I have to copy useful XQuery functions from one transformation to another. Ideally I should be able to call an XQuery function external to the transformation.
Does anyone have any pointers on this or is it a fundamental limitation of the OSB XQuery implementation?
regards

What we did is creating a seperate project in which we use most of XQuery stuff, using SaxonSA library to run and validate the queries.
This project adds the following possibilities for xqueries:
- Schema validation of XPath used in XQueries (including namespaces)
- XQuery syntax validation (with errors at the exact line and position where it fails.
- Allows the use of modules
- Reqression testing XQueries
Regrettably we can not do Java callout's from XQueries as this is not supported on the ESB.
We also build a simple 'flattener' that takes a module based, schema enriched XQuery and then generates the XQuery that can be used on the ESB itself. The flattened query is also regression tested.
Although it was quite some work to make it, it already has paid back the initial costs of the project in the second or third project we did. We since then have enhanced the project so it also can do regression message flow validation on the OSB (we already had valid input and output messages).
The tool also greatly improves the stability of the code on the OSB, and reduces development time as we can build the XQuery from a unit test environment that will point out typos and other xpath related problems.
We do have some fairly complex xqueries on the OSB, the number of xqueries in the project at the moment is 187 with 250 unittests.
So, if Oracle is not going to include it in the OSB itself (which seems lilkely at the moment), you can build such a system yourself !
Wim Veldhuis,
PharmaPartners BV

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OSB: How to recreate reusable XQuery functions

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