The ENTER command assigns a directory name or an additional
    directory name to a field, record, or generic element.

    The FROM clause assigns a directory name to an element that does
    not have a directory name. For example, field and record elements
    within an Oracle Rdb database definition may not have directory
    names.

    Without a directory name, the DIRECTORY command cannot display
    an element, and you cannot include the element as part of other
    elements. For example, you would not be able to include a field
    element without a directory name in an Oracle Rdb global field
    definition.

    The FOR clause assigns an additional directory name to an element
    that has a directory name. This functionality allows you to give
    an element different names on a local node and a remote node.

    You must issue the ENTER command with the FOR clause for an
    element before you can reserve that element in a distributed
    environment. See Using Oracle CDD/Repository on OpenVMS
    Systems for information on reserving elements in a distributed
    environment.

    CDO enters directory names in your currect default directory.
    The ENTER command fails if an element in that directory has
    a directory name that is the same as the processing name you
    specify.

                               RESTRICTION

       The ENTER command does not apply a default ACL to the object
       being entered. Therefore, if the object did not have an ACL
       prior to being entered, it will not have one after being
       entered in the directory system. Setting the desired ACLs is
       left to the discretion of the user.

       You cannot issue the ENTER command to enter fields or
       records within a variant of CDO record definitions that
       were converted from DMU definitions. Field definitions and
       record definitions that exist only within the context of a
       variant cannot be given directory names.

    Use this command to assign directory names to field definitions
    or structure definitions within record definitions converted from
    DMU. When an object (such as a field definition) has a directory
    name, that object can be included in other definitions (for
    example, field definitions with directory names can be used as
    Oracle Rdb global fields).