| Similarity |
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Snapshot |
| 189 |
The time is ripe for another attempt at using natural language to represent documents inside a computer
...It has never been assumed that a retrieval system should attempt to understand the content of a document
...Such an approach would make feedback a major tool
...Future developments Much of the work in IR has suffered from the difficulty of comparing retrieval results
... |
| 147 |
now have the situation where a number of questions exist for which the correct responses are known
...There is a concept of relevance which can be said to be objective and which deserves mention as an interesting source of speculation
...Logical relevance is most easily explicated if the questions are restricted to the yes no type
...A stored sentence is logically relevant to a representation of an information need if and only if it is a member of some minimal premiss set of stored sentences for some component statement of that need
...Although logical relevance is initially only defined between sentences it can easily be extended to apply to stored documents
... |
| 1 |
One INTRODUCTION Information retrieval is a wide,often loosely defined term but in these pages I shall be concerned only with automatic information retrieval systems
...To make clear the difference between data retrieval DR and information retrieval IR,I have listed in Table 1
... |
| 181 |
A short paper by Good [44]which is in sympathy with the approach based on a theory of measurement given here,discusses the evaluation of retrieval systems in terms of expected utility
...One conspicuous omission from this chapter is any discussion of cost effectiveness
...References 1
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...26,321 343 1975
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