Similarity	Concept
	Generality
	Automatic document classification
	Document representative
	Index sequential file
	Indexing
	Probabilistic retrieval
	Natural classification
	Document clustering
	Classification algorithms
	File structures

Similar pages

Similarity	Page	Snapshot
	84	eventually terminate at a particular node from which no further branches will emerge ...By now it is perhaps apparent that when we were talking about ring structures and threaded lists in some of our examples we were really demonstrating how to implement a tree structure ...Another example of a tree structure is the directory associated with an index sequential file ...The use of tree structures in computer science dates back to the early 1950 s when it was realised that the so called binary search could readily be represented by a binary tree ...
	91	A description of the use of a sequential file in an on line environment may be found in Negus and Hall [36]...Work on tree structures in IR goes back a long way as illustrated by the early papers by Salton [43]where not only methods of construction are discussed but also techniques of reorganisation ...More recently a special kind of tree,called a trie,has attracted attention ...The use of hashing in document retrieval is dealt with in Higgins and Smith [50]...It has become fashionable to refer to document collections which