LIFER System
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The LIFER System is a NLP system that was first designed as a natural language interface to a knowledge base about US Navy ships.
- AKA: LADDER System.
- Context:
- It was first proposed by Hendrix (1976).
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- Example(s):
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- Counter-Example(s):
- See: Natural Language Query, Semantic Grammar, Distributed Database, Data Analysis, Controlled Natural Language, Deep Learning System, Artificial Neural Network, Information Extraction System, Information Retrieval System, Speech Processing System, TextBlob.
References
2021
- (Wikipedia, 2021) ⇒ https://en.wikipedia.org/wiki/LIFER/LADDER Retrieved:2021-10-31.
- LIFER/LADDER was one of the first database natural language processing systems. It was designed as a natural language interface to a database of information about US Navy ships. This system, as described in a paper by Hendrix (1978), used a semantic grammar to parse questions and query a distributed database.
The LIFER/LADDER system could only support simple one-table queries or multiple table queries with easy join conditions.
Some examples of queries it could accept:
- What are the length, width, and draft of the Kitty Hawk?
- When will Reeves achieve readiness rating C2?
- What is the nearest ship to Naples with a doctor on board?
- What ships are carrying cargo for the United States?
- Where are they going?
- Print the American cruisers’ current positions and states of readiness?
- LIFER/LADDER was one of the first database natural language processing systems. It was designed as a natural language interface to a database of information about US Navy ships. This system, as described in a paper by Hendrix (1978), used a semantic grammar to parse questions and query a distributed database.
1977
- (Hendrix, 1977) ⇒ Hendrix, G. G. (1977). The LIFER Manual: A Guide to Building Practical Natural Language Interfaces. Technical Note 138, Artificial Intelligence Center, Stanford Research Institute, Menlo Park, California, 1977.
1976
- (Hendrix, 1976) ⇒ Hendrix, G. G. (1976). LIFER: A Natural Language Interface Facility. Technical Note 1;5, Artificial Intelligence Center, Stanford Research Institute, Menlo Park, California, 1976.