Oracle: Import 11g data dump into 10g

You can use Oracle data dump to export data dump from 11g server, and import into 10g using the data Pump parameter called Version. When you use Version, Datapump exports all objects that are compatible for your target version

So, If your database is 11g and you want to export 11g and import into 10g

from 11g db cmd promt> expdp Test_schema_name/passs directory=datapump schemas=Test_Schema_Name Version=10.2.0.4.0

Once the export is done, you do the regular import from 10g server.