Oracle XOPEN/XA Interface

I'm trying to use Oracle 7.1 on SCO Unix as a resource manager in a Tuxedo application. What I need to do is build a Tuxedo resource manager server so that the Tuxedo programs can access Oracle. There is a utility provided by Tuxedo to create this, but I need to know a couple of things before I can go ahead. There should be a couple of Oracle libraries which provide the XA services, but I need the names of these. Also I need the format of the strings supplied to the XA functions OPENINFO and CLOSEINFO. Can someone help me with this?

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