The SHOW USED_BY command displays the children of the element you
    specify. The display includes the properties of children and the
    values associated with these properties.

    The SHOW USED_BY command lists children if they have either
    directory or processing names. CDO looks first for the directory
    name and displays it if one exists. If a directory name does not
    exist, CDO then looks for and displays the processing name.

    A definition can only exist in the repository without a directory
    or processing name if it has a relationship to an owner that has
    a directory name. CDO displays a name unspecified message in this
    case.

    To display Oracle Rdb database definitions, specify the name
    of the database as the element-name parameter and use the
    /FULL qualifier. Because CDO displays the full path name of
    each repository element, you can use the SHOW USED_BY command
    to determine where each instance of a particular element occurs
    and how it relates to other elements.