App needs to run on multiple DBs; can parsing schema/ ref owner be dynamic?

I have an app that needs to run on multiple databases. Is there a way to create something like an app-level item -- something that only needs to be set once -- that can be referenced to specify the parsing schema, and all of the instances of "reference table owner" used to specify the source for DML? Or (I've not tried this yet) can I just NOT set the value of reference table owner? In my case, the reference table owner for all tables is the same as the parsing schema.
Thanks,
Carol

hi Varad -- I should have been more specific. The application does not need to access multiple databases; rather, it will be installed on multiple databases, operating only on the DB on which it's installed. (Same functionality on each DB, same DB schemas in each, different data in each.)
So, I'm wondering if there is a way to have the parsing schema somehow be set automatically based on information in the database, or if I'll have to create a slightly different version of the app, w/ different parsing schemas, for each database.
It was recommended to me (perhaps by you, I can't recall) that the parsing schema be the same as the owner of the tables that the app accesses; the table owner is different in each of these databases, so that is the source of this problem (if indeed it is a problem).
Thoughts?
Thanks,
Carol

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