Sorting by Relevance - Full-Text Retrieval (FTR) - Help

Full-Text Retrieval (FTR) Help

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The FTR Interface allows documents retrieved from Quick and Content FTR searches in Directa to be sorted by relevance. To see the most relevant documents first in the returned list of documents, change the sort so the objects are sorted in descending order by the Relevance attribute.

The relevance ranking displayed is a numeric value. Higher values indicate more relevant documents. The actual value depends upon the method used to calculate the relevance. The relevance method used can be specified using the Directa site.cfg file variable FTR_RELEVANCE_METHOD. Here are the possible values for FTR_RELEVANCE_METHOD.

Value

Name

Description

2:1

Hits Count

Counts the total number of occurrences of the individual words (not phrases) matched regardless of the term frequency within the table.

2:2

Terms Count

Counts the number of search terms matched. The frequency of the occurrence of the terms is not considered.

2:3

Terms Ordered

Uses a mathematical formula that computes the relevance statistically. It combines the characteristics of algorithms 1 and 2 and takes into account not only the number of occurrences of each search term, but also a statistical measurement of how common the term is over all the rows in the table (document frequency).

2:4

Critical Terms Ordered

Uses a mathematical formula that computes the relevance statistically and accentuates the effect of the inverse document frequency. It squares the search term importance before multiplying it with the number of occurrences of the search term.

If the fuzzy option is turned on for searching, the FTR Interface will use the Terms Count relevance method, regardless of the value of FTR_RELEVANCE_METHOD.