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INFORM EVENT
Homer stores information from its text interpreter
as inform events in the episodic memory.
These are list structures that record the source of the information,
the recipient of the information, the type of information, and the time
the information is received. In general, the source is the user interacting
with Homer. The information stored can be a statement of fact, a question,
or a command. Commands and questions are stored as inform events that
convey the information that Homer has a goal to achieve, be it performing
some task or answering a question.
STATE TRANSITION SEMANTICS
"a framelike description of verbs augmented by a description
of the effect of the action on world state"[1]
In order to better integrate natural language processing and planning,
Homer employs this special representaion for verbs. The key feature of
state transition semantics is their encoding of procedural knowledge.
The definition of a verb is similar to that of a STRIPS style operator.
A verb has an antecedent and a consequence stored as part of its definition.