Page 129 - Intelligent Communication Systems

108 INTELLIGENT COMMUNICATION SYSTEMS
Since "Shop" is derived from "Perishables shop A," the answer to our problem is
yes.

10.2 DESCRIPTION OF TELECOMMUNICATION SERVICES
IN A SEMANTIC NETWORK

Semantic networks can be used to describe a terminal state and a line state. A ter-
minal state is shown in Figure 9.18. Here's one interpretation of this semantic net-
work:
Person-to-person call PART_OF relationship between terminals.
Three-party call PARTJDF relationship between terminals.
Call forwarding variable PART_OF relationship between terminals.
In other words, there is a person-to-person call, a three-party call, and a call for-
warding variable in a relationship between terminals.
Here's another interpretation of this semantic network:
Person-to-person call IS_A relationship between terminals.
Three-party call IS_A relationship between terminals.
Call forwarding variable IS_A relationship between terminals.
In other words, a person-to-person call is a relationship between terminals, a three-
party call is a relationship between terminals, and a call forwarding variable is a
relationship between terminals.
A terminal action is shown in Figure 9.19. Here's one interpretation of that
semantic network:
Change to disconnected PART_OF change in line state.
Change to conversing PART_OF change in line state.
Change to on-hold PART_OF change in line state.
Here's another interpretation:

Change to disconnected IS_A change in line state.
Change to conversing IS_A change in line state.
Change to on-hold IS_A change in line state.
From Figure 10.5, the following interpretations are possible:
Handle PART_OF automobile.
Body PART_OF automobile.
Tire PART_OF automobile.
Brake PART_OF automobile.
From Figure 10.5, the following interpretations are not possible:
Handle IS_A automobile.
Brake IS_A automobile.