A Natural Language Interface for Computer-Aided Design, 1st by Tariq Samad (auth.)

By Tariq Samad (auth.)

The creation of computing device aided layout and the proliferation of desktop aided layout instruments were instrumental in furthering the state-of-the­ artwork in built-in circuitry. carrying on with this development, notwithstanding, calls for an emphasis on developing straight forward environments that facilitate the interplay among the clothier and the CAD software. the belief of this truth has triggered investigations into the appropriateness for CAD of a couple of user-interface applied sciences. One kind of interface that has hitherto now not been thought of is the average language interface. it truly is our rivalry that usual language interfaces may perhaps remedy a number of the difficulties posed by way of the expanding quantity and class of CAD instruments. This thesis represents step one in a study attempt directed in the direction of the eventual improvement of a normal language interface for the area of laptop aided layout. The breadth and complexity of the CAD area renders the duty of constructing a traditional language interface for the full area past the scope of a unmarried doctoral thesis. for that reason, we've got initally focussed on a sub-domain of CAD. particularly, we now have constructed a average language interface, named Cleopatra, for circuit-simulation post-processing. In different phrases, with Cleopatra a circuit-designer can extract and manage, in English, values from the output of a circuit-simulator (currently SPICE) with out manually having to move in the course of the output records produced by means of the simulator.

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Vbuff* indicates clause-boundaries. As soon as a verb is encountered, all the items on *vbuff* until (and including) the last clause-boundary marker are deleted. Since Cleopatra is not very sophisticated 41 about auxiliaries or adverbs 16 , *vbuff* is not used extensively. Both *buff* and *vbuff* act somewhat like last-in first-out stacks. Only the most recent element on either of 1~hese variables is immediately accessible. Although confidence-levels are an essential feature of Cleopatra's approach, we will ignore their role in the parsing process throughout this chapter, and for most of the next.

However, case-frames by themselves are not a sufficient formalism for all the (especially syntactic) complexities of natural language processing. One way to partially overcome the poor syntactic coverage of purely case-based systems is to integrate case-frames with a pattern-matching facility [1, 36]. As we said at the beginning of this chapter, this discussion by no means exhausts all the approaches that have been tried, nor even does it provide a complete list of advantages and disadvantages of the approaches considered.

The connections: slot consists of a list of pairs (implemented as dotted pairs in Lisp), the first element of each being a surrogate-id, the second the associated real id. In our example, if the (real) id of the adjective-frame is a 00002, the connections: slot of the noun-frame would read [connections: (x00008 . a00002)}. All references to other frames within a frame are through surrogate-id's. When the actual referent frames need to be accessed, the surrogate id's are used as keys on the connections: slot-value.

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