How to generate schema from designer?

I have the following problem - my application is intended as development tool, e.g. laike Oracle warehouse builder or so. So - the main part will be graphical designer, which imports the structure of existing database and then user can draw the structure of additional database schema (and maybe - the user can specify some mappings and/or relationships in some other way as well) and then - my application will generate schema based on these drawings (e.g. my application can generate SQL statements like create table and so on and then - execute them).
My current plan is to use UML (or EMF, maybe together with database modelling profile if available) designer from Eclipse as the main part of application and then the SQL generation I can organize in code (where the UML drawing I can access as tree of code instances) ro even - if there is one available - I can define transformation from UML database profile to SQL code (in manner of MDA - model driven architecture, as advised by people from IBM Rational). I think - this should be pretty optimal use of already available free-source technologies... I have intention to use this for Oracle database only, so - I have no intention to make tool that can definitely work with any SQL-standard compliant database.
I only wanted to check - what are your thoughs about this. Now I wonder - does Oracle offer some framework for building developer productivity tools as I described. It could be quite logical - because Oracle itself should have some kind of platform e.g. for building its Warehouse Builder and so on - why not open this platform for wider use? So - I wanted to just check - if there some alternative (more appropriate for Oracle) available instead of using Eclipse.
Message was edited by:
user454720

Thanks for the schema generation task info.
I found that OAS 10.1.3 is not Java EE 5 compliant (at least not yet), so it's only got JAXB 1.0. Hence my JDev library problem and the schema generation confusion were both from the same cause.
Thanks.

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Sorry for offtopic....
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GUI Common files 6.0.8.12.1
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P.S. I hope i've explained my problem clearly. If somethig is not clear, pls e-mail me.

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