XMLBeans an satndard or a potential "Vendor Lock-in" source?????

Hi...
I'm developing a J2EE App that needs to persist its configuration data in a non Database storage mainly because one of the config data is the database connection string, driver name, etc.
Taking a look at some App servers instalations directories (SJSAS an JBOSS) i fpund that both servers persist this type of info using XML files so i think that my app may take advantage of using xml instead Java Properties files...
Well, the problem is that after searching info about some JAXP and JAXB APIS i found a third party API Called XMLBeans from Apache Foundation... As JAXB, XMLBeans bind java objects to XML file but it also support XMLSchema files.
My app real requirement is to persist its configuration data to server file system and validate the data at runtime in order to pevent data corruption. XMLBeans appears to be what i need to use but using a third party API would no bring me app to a "VENDOR LOCK-IN"???
I know that some of this third party libraries becomes parts of J2SE or J2EE Standard after some time but i want to be sure of what i'm doing in order to make my app as portable as possible.
Regards...

thanks for the anwser... well my goal is to develop an application capable of read and write xml files according to a schema...
i want to avoid vendor specific features in order to be able to deploy my app to any J2EE Server that implement the standard (SJSAS, JBoss, Etc).
it's seen that i do not make myself clear, my goal is to be able to deploy my app without having to create system variables, adding extra libraries to J2EE server, etc.... i guess XMLBeans is the right way, but if you know a way to write xml files and validate it against schemas using native Java API (StrAX, JAXB, JAXP) please let me know....
I wil try to put XMLBeans libraries inside lib folder of my ear just to see what happend !!!!!!!!!!
Anyway thanks for the help and any advice you could give me....
Regards

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