Command categories

Help:

• ? , Print Grok operation summary, history, etc.

File access:

• getta: load a TA (Tuple-Attribute Language) database.
• putta: write factbase in memory to a TA (Tuple-Attribute Langauge) file.
• appenddb: add factbase in memory to an existing RSF (Rigi Standard Format) file on disk.
• getdb: load an RSF database.
• putdb: write factbase in memory to an RSF (Rigi Standard Format) file.

Factbase information and manipulation:

• setnames: list names of all sets in factbase.
• relnames: list names of all relations in factbase.
• reset: destroy factbase currently in memory.
• quit: quit.

Entity information and manipulation:

• EMPTYREL: return an empty relation.
• EMPTYSET: return an empty set.

Math and Statistics:

• max: return largest member in a set.
• min: return the smallest member in a set.

Interactive landscape exploration:

• Options: Type ? in Grok for list of options and commands.
• show: print information about an entity.
• showedge: explore a compound edge between entities.
• showtree: show the containment structure of a landscape. (Add integer depth to limit depth list listing. Add node for subroot to start from.)