catalog location

[Carmen Martinez <carmenmtezcruz@xxxxxxxx>]

Please, I need to know where the catalog tables (pg_class, pg_attrdef...) are located in the postgresql rdbms. Because I can not see them in the pgAdminII interface, like other tables or objects. And I can not find any reference about where this information is, please any help would be welcome.
 
 Also I'd like to know if these catalog classes are owned by the superuser (I defined it when I installed ) or all the users could access to them and perhaps modify them.
 
 Thanks,
 
 Carmen

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