ACEDB class definitions

Ela Pustulka-Hunt hunt_e at rag100.rz-berlin.mpg.de
Thu Jun 6 06:49:33 EST 1996

What is the meaning of "is UNIQUE ?Object XREF is"

-?Collection is            UNIQUE ?Object XREF is
            owner         UNIQUE ?Object
            description   UNIQUE Text
            set                  ?Object
            keyset               ?KeySet
            n_array  Int  UNIQUE ?Object
            a_array  Text UNIQUE ?Object
            binary_rel    ?Object ?Object Text
            ternary_rel   ?Object ?Object ?Object Text
            list          UNIQUE ?Object REPEAT
            graph         ?Object ?Object Text
            generic_properties  #Generic_properties

with reference to the ?Object below.
Why are generic_properties defined in both?

-?Object     is  ANY
            aux Text Text REPEAT             
            generic_properties  #Generic_properties

Ela Pustulka-Hunt                        hunt_e at rag100.rz-berlin.mpg.de
Database Administrator                   tel. 030 - 8413-1356

Max Planck Institut fuer Molekulare Genetik, Abtl. Lehrach
Ihnestrasse 73, 14195 Berlin, Germany 

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