ABSTRACT

There are two very different ways of implementing semantic networks (see Fig. 6.1) in networks of simple hardware units. The obvious approach is to make different nodes in the semantic net correspond to different hardware units and to make links between semantic nodes correspond to hardware links between units. This type of direct implementation is advocated by Fahlman (Chapter 5, this volume) and Feldman (Chapter 2, this volume). It is also implicit in models that talk about “activation” spreading from one semantic node to another (Collins & Loftus, 1975; Levin, 1976). Two formalisms for representing relational information. In (a) the roles of the constituents of a relationship are determined by their positions at the head, tail, or side of an arrow. In (b) the position in a string determines the role. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315807997/2a26319a-018c-4d03-8167-91abc2cceb63/content/fig6_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>