Below is a description of the fields of the table that can be accessed through the interfaces.
pgc number of the group. The pgc number indexes all the objects of the database and is sometime associated with the PGC name, it is intended for internal usage and should not be used to name objects in publications.
Designation of the association
Probability of the membership with the parent
The type of membership determination:
projection - the work uses only information about distribution of objects on the sky
gravity - the work uses information about kinematics or distances of the objects for group identification