Unless you use the PATHNAME argument in the CREATE DATABASE
    statement, SQL does not use the repository to store data
    definitions.

    If you specify the PATHNAME argument when you first create a
    database, SQL creates a path name that contains copies of data
    definitions for the database.

    Because SQL treats a path name like a string literal, you must
    enclose a path name in single quotation marks. You must use ASCII
    alphanumeric characters for the repository path name.

    When you issue an ATTACH or a DECLARE ALIAS statement, you can
    either specify the repository path name for that database (which
    in turn points to the physical database files) or directly name
    the physical database file specification.

    If you do not use the PATHNAME argument in the CREATE DATABASE
    statement, you cannot specify a path name in ATTACH or DECLARE
    ALIAS statements for that database unless you first issue an
    INTEGRATE statement. Oracle Rdb recommends that you always use
    a repository path name in CREATE DATABASE, ATTACH, and DECLARE
    ALIAS statements, and that you use the DICTIONARY IS REQUIRED
    clause to ensure that the two copies are the same.

    A repository path name can be a:

    o  Full path name, such as CDD$TOP.ELLINGSWORTH.SQL.PERSONNEL

    o  Relative path name

       A relative path name consists of the portion of the full
       path name that follows the current default repository
       node. For example, assume that you used the SET DICTIONARY
       command to set the current repository directory to
       CDD$TOP.ELLINGSWORTH.SQL. Now you can use the relative
       path name PERSONNEL in place of the full path name
       CDD$TOP.ELLINGSWORTH.SQL.PERSONNEL. By default, SQL sets
       the current repository node to the path name defined by the
       CDD$DEFAULT logical name. See the SET for the description
       of the SET DICTIONARY statement. See also Using Oracle
       CDD/Repository on OpenVMS Systems for more detail on
       repository path names.

    o  Logical name for a full or relative path name

    Some Oracle Rdb features are not fully supported by all versions
    of the repository. If you attach by path name and attempt
    to create, modify, or delete objects not fully supported by
    the repository, you may receive an error or informational
    message. See the Oracle Rdb Release Notes for information about
    compatibility of Oracle Rdb features with the different versions
    of the repository.