Explanations for SQL, COSI, RDB, RDO, RDML, RDMS, and Oracle RMU
    facility messages are provided in online files:

    o  SQL messages:

       SYS$HELP:SQL$MSG.DOC

    o  Common Operating System Interface (COSI) messages:

       SYS$HELP:COSI_MSG.DOC

    o  Common Oracle Rdb messages:

       SYS$HELP:RDB_MSG.DOC

    o  RDO messages:

       SYS$HELP:RDO_MSG.DOC

    o  RDML messages:

       SYS$HELP:RDML_MSG.DOC

    o  Oracle Rdb specific (RDMS facility) messages:

       SYS$HELP:RDMS_MSG.DOC

    o  Oracle RMU messages:

       SYS$HELP:RMU_MSG.DOC

    o  NSDS messages:

       SYS$HELP:NSDS$MESSAGES.DOC

    o  RMS messages:

       RMS error messages can be found in the OpenVMS documentation.
       There is no online documentation for RMS error messages.

    o  Repository messages:

       SYS$HELP:CDDPLUS_MSG.DOC

    o  Replication Option for Rdb messages:

       SYS$HELP:DDAL$MSG.DOC

    The SQL error message explanations are also included in the
    interactive SQL Help file under the "Errors" topic.

    The COSI error message explanations are also included in the
    Oracle RMU and RDO Help files under the "COSI_ERRORS" topic and
    in the SQL Help file under the "Errors" topic.

    The RDO and RDMS error message explanations are also included in
    the RDO Help file under the "Errors" topic.

    The Oracle RMU error message explanations are also included under
    the "RMU_ERRORS" topic in the Oracle RMU help file.

    The Replication Option for Rdb error message explanations are
    also included in the interactive SQL Help file under the "Errors"
    topic of the "REPLICATION_OPTION" topic.

    The RDB facility messages are no longer included in the RDO Help
    file because a subsequent installation of Gateway software or
    Rdb/ELN upgrades the RDB_MSG.DOC file whenever the RDB message
    image, RDBMSGS.EXE, includes new or revised error messages. Thus,
    the source for the latest, most up-to-date RDB facility messages
    is always the RDB_MSG.DOC file in SYS$HELP.

    The message documentation for all the facilities follows the same
    format, with messages alphabetized by message name. After the
    message name and text, the documentation includes an explanation
    and suggested user action.

    You can print the online message documentation files for
    reference. In addition, you can use a search command to see only
    the message information you need. The following example shows a
    user receiving the RDMS error message RELEXI, then obtaining an
    explanation of the RELEXI message from the RDMS online message
    documentation file:

    RDO> DELETE FIELD ID_DOM.
    %RDB-E-NO_META_UPDATE, metadata update failed
    -RDMS-F-RELEXI, field ID_DOM is used in relation EMPLOYEES
    -RDMS-F-FLDNOTDEL, field ID_DOM has not been deleted
    RDO> ROLLBACK
    RDO> FINISH
    RDO> EXIT
    $
    $ SEARCH/WINDOW=(0,10) SYS$COMMON:[SYSHLP]RDMS_MSG.DOC RELEXI
    RELEXI,        field <str> is used in relation <str>

    Explanation:   The specified field you attempted to delete is used in
                   a relation.

    User Action:   You should first change the relation to exclude this
                   field, and then delete the field.
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