relevance

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relevance

(information science)
A measure of how closely a given object (file, web page, database record, etc.) matches a user's search for information.

The relevance algorithms used in most large web search engines today are based on fairly simple word-occurence measurement: if the word "daffodil" occurs on a given page, then that page is considered relevant to a query on the word "daffodil"; and its relevance is quantised as a factor of the number of times the word occurs in the page, on whether "daffodil" occurs in title of the page or in its META keywords, in the first N words of the page, in a heading, and so on; and similarly for words that a stemmer says are based on "daffodil".

More elaborate (and resource-expensive) relevance algorithms may involve thesaurus (or synonym ring) lookup; e.g. it might rank a document about narcissuses (but which may not mention the word "daffodil" anywhere) as relevant to a query on "daffodil", since narcissuses and daffodils are basically the same thing. Ditto for queries on "jail" and "gaol", etc.

More elaborate forms of thesaurus lookup may involve multilingual thesauri (e.g. knowing that documents in Japanese which mention the Japanese word for "narcissus" are relevant to your search on "narcissus"), or may involve thesauri (often auto-generated) based not on equivalence of meaning, but on word-proximity, such that "bulb" or "bloom" may be in the thesaurus entry for "daffodil".

Word spamming essentially attempts to falsely increase a web page's relevance to certain common searches.

See also subject index.
References in classic literature ?
Mr Sparkler, finding himself stunned by the words thus heaped upon his inoffensive head, made a brief though pertinent rejoinder; the same being neither more nor less than that he had long perceived Miss Fanny to have no nonsense about her, and that he had no doubt of its being all right with his Governor.
less pertinent than Epaminondas or Homer being there?
It is pertinent to mention that Askari Alphas defeated Malir Trojans in their group B opener.
The activity provides a platform to the leaders from Government, Industry and Academia for a discourse on the issues pertinent to the IT industry of the country and to bring together the entire IT fraternity under one roof.
It is a bi-annual event conducted to provide a platform to the leaders from Government, Industry and Academia for a discourse on the issues pertinent to the IT industry of the country and to bring together the entire IT fraternity under one roof.
Another agenda item is the discussion on the issues pertinent to the cybersecurity.
It is pertinent to mention that out of four players of Mohib Ullah Squash Academy three reached quarter-finals while Hammad stood runners up in U-13 category.
It is pertinent to note that this list of people had some form of celebrity status attached to their names either through public office or because they are renowned businessmen.
The proposed construction will include concrete floor slab (and associated footings/foundations), fiber cement board and batten siding exterior walls, standing seam metal roof, and pertinent interior finishes including, doors, gypsum board interior partitions and mechanical and electrical systems.
The National Statistics Office is not only tasked to collate birth records for passport applications but also other pertinent data that include death records, household/residency composition, as well as other enumerator details that's used by government agencies in planning budget for the next service distribution cycles.
The two-day meeting, chaired by Jordan, will look into 28 items pertinent to Arab national security as well as political, economic, and social cooperation amongst Arab nations.
Its new LinkedIn account creates a forum to also share data, but serves as a more informative portal to place Sherwin-Williams generated whitepapers, blog postings and forward pertinent coatings industry news summaries and articles.