Script in Knowledge Representation and Its Example

Script in Knowledge Representation

A script is an organized description of a predetermined series of events inside a certain setting. The script is used in the representation of knowledge. It is a type of knowledge representation scheme. A script, then, is a framework that specifies a series of events that one could anticipate building upon one another.

Events are arranged in knowledge bases using scripts. Scripts and the concept of frames are closely related. In natural language understanding systems, scripts are employed to arrange a knowledge base according to the scenarios that the system needs to understand.


Scripts are useful because: 

  • Things usually happen in predictable runs or patterns. 
  • There are ties between occurrences that are not formal. 
  • Requirements end when things happen.


Components of Script

1. Roles: Individuals taking part in an event.

2. Props: Items used in the performance.

3. Entry condition: Requirements that must be met for a scripted event to take place.

4. Result: Requirements that must be held following an occurrence in the script.

5. Track: A script variation.

6. Scenes: The order in which events happen.


Scripts are described using unique action symbols. These are the following:

Symbols

Meaning

Example

ATRANS

Move a relationship between

giving

PTRANS

Change the physical locatio

go

PROPEL

Use physical force on the object

to push

MOVE

The owner's movement of the body portion.

kick

GRASP

Snatch something an actor

hold

INGEST

Animals stealing anything to eat

drink

EXPEL

out of an animal body

cry

MTRANS

Transmit mental data

tell

MBUILD

Construct a new piece of knowledge

and decide

CONC

Conceptualize or think about an idea

think

SPEAK

Produce sound

say

ATTEND

Focus sense organ

listen

Example of Script in Knowledge Representation

Script for going to see the movie.

SCRIPT : MOVIE-WATCHING

TRACK : THEATRE

PROPS : MONEY

                TICKET

                TICKET WINDOW

                CHAIR

                MOVIE = M

                CHANGE

ROLES : S = Movie viewer

                 Tc = Ticket checker

                 Tg = Ticket giver

                 O = Owner

Entry conditions : S is interested in the movie.

                                S has money.

Results : S has less money.

                O has more money.

                S is pleased.

                S is not pleased.

Scene- 1:

S       PTRANS S to Theater.

S       ATTEND eyes to ticket window.

S       MBUILD himself in the queue.

S       PTRANS towards ticket window as queue moves.

S       MOVES to buy a ticket.

 

SCENE- 2:

S       MBUILD choices to Tg.

Tg     PTRANS TICKET to S.

S       ATRANS MONEY to Tg.

Tg     ATRANS CHANGE to S.

S       PTRANS  S towards Movie hall.


SCENE- 3:

Tc     MTRANS S for a ticket.

S       PTRANS Ticket to Tc.

Tc     PTRANS Ticket to S.

S       PTRANS S in the movie hall.

Tc     MTRANS about his chair.

S       PTRANS in the chair.

S      MTRANS MOVIE.


SCENE- 4: 

S      PTRANS S towards the movie hall door.

S      PTRANS S to out of movie  hall.

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