ignore columns in SSDL for entity-framework

ignore columns in SSDL for entity-framework

We use dotconnect for Oracle and have three schemas (Master, Staging and
Prod) in our database. We have three SSDL files, one corresponding to each
schema. Until now all the schemas had the same table structure, but now we
have less number of columns in one of the table in one schema. We have one
Data Model for all three schemas and use the different SSDL files when
querying the corresponding schema. Is there a way to ignore columns in the
SSDL file (or elsewhere), so we can continue using a single Data Model?
Thanks.