The CWMLITE tablespace holds the repository for Oracle OLAP Services which you must have included during Database Creation via the DBCA. It is used by WMSYS schema. See "Oracle9i Application Developer's Guide - Workspace Manager":

Oracle Workspace Manager (WMSYS schema), often referred to as Workspace Manager, provides an infrastructure that lets applications conveniently create workspaces and group different versions of table row values in different workspaces. Users are permitted to create new versions of data to update, while maintaining a copy of the old data. The ongoing results of the activity are stored persistently, assuring concurrency and consistency.

Workspace Manager creates a user named WMSYS. The WMSYS schema is used to store all the metadata information for Workspace Manager. A PL/SQL package with the public synonym DBMS_WM contains the Workspace Manager procedures.

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