The HCOSS tools used to prepare for a migration rely on a data file known as a schema extract file. This file contains metadata extracted from the DB2 system catalog for database schemas you want to migrate. As the first step in preparing for a DB2 database to SQL Server database migration, use the Extract Schema tool to create this file. You can run the tool either from the HCOSS user interface, or from the command line using the MFExtractSchemaInfo command.
HCOSS uses the generated schema extract file in the next step of the database migration process - defining lists of specific tables and views to migrate.