For version 2.1 it's in Chapter 15 of the Admin Guide.

        ----------
        From:  Bob Booth - CSO[SMTP:booth AT CHIANTI.CSO.UIUC DOT EDU]
        Sent:  Tuesday, April 07, 1998 3:13 PM
        To:  ADSM-L AT VM.MARIST DOT EDU
        Subject:  DRM Docs

        I am having trouble locating documentation on DRM.  Is it all
redbook, or are
        there official IBM whitebooks?  It does not appear to exist on
any of the CDROM
        docs that I have access to.

        Thanks,

        Bob Booth