Uncontrolled vocabulary

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23 searching ...One last distinction,the vocabulary of an index language may be controlled or uncontrolled ...The index language which comes out of the conflation algorithm in the previous section may be described as uncontrolled,post coordinate and derived ...There is much controversy about the kind of index language which is best for document retrieval ...Probably the most substantial evidence for automatic indexing has come out of the SMART Project 1966 ...The document representatives used by the SMART project are more sophisticated than just the lists of stems extracted by conflation ...