- 2072 Magh · 7 marks
Frames, semantic net; sakti gauchan
Short answer
Frames use slots and defaults; semantic nets are graphs with labeled arcs. Conversion: Person --is-a--> Mammal; Person --has-part--> Nose; Sakti Gauchan --instance--> Person, --team--> Nepalese Team, --uniform-colour--> Red/Blue. Sakti Gauchan inherits nose and mammal status.
What are Frames and Semantic Net? Convert the given sentences in semantic net. i) A person is a mammal. ii) Sakti Gauchan is a person. iii) Person has nose. iv) Sakti Gauchan is in Nepalese team. v) Uniform color of Sakti Gauchan is Red/Blue.
Frame
A frame is a structure to represent a stereotyped object or situation. It has a name and slots with values, defaults and attached procedures, organised in an is-a hierarchy so slots are inherited (Minsky).
Example: Frame Person (is-a Mammal; has: nose; legs: 2).
Semantic net
A semantic net is a graph with nodes for objects/concepts and labelled arcs for relations. Properties are inherited via is-a and instance arcs.
Conversion of the given sentences
Each sentence becomes nodes and arcs:
| Sentence | Arc |
|---|---|
| i) A person is a mammal | Person --is-a--> Mammal |
| ii) Sakti Gauchan is a person | Sakti Gauchan --instance--> Person |
| iii) Person has nose | Person --has-part--> Nose |
| iv) Sakti Gauchan is in Nepalese team | Sakti Gauchan --team--> Nepalese Team |
| v) Uniform colour is Red/Blue | Sakti Gauchan --uniform-colour--> Red/Blue |
[Mammal]
^
| is-a
[Person] --has-part--> [Nose]
^
| instance
[Sakti Gauchan] --team--------------> [Nepalese Team]
|
+--uniform-colour----------> [Red/Blue]
Assumption: "Red/Blue" is kept as one value node (red and blue are the two colours of the Nepali uniform). It could also be two nodes.
Inference: Sakti Gauchan has a nose (inherited from Person) and is a mammal (Person → Mammal).
Frame form of the same facts:
Frame: Person is-a: Mammal; has-part: Nose
Frame: Sakti_Gauchan instance-of: Person
team: Nepalese Team
uniform_colour: Red/Blue
✓ Answer checked by Claude Opus 5.5 (high effort)
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