relevance


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.

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 periodicals archive ?
BlueVenn Relevance, taking place on March 14, 2018, 10am-1pm EDT (2pm-5pm GMT), consists of three live, back-to-back presentations and demonstrations from multi-channel personalization technology experts.
Lot 01 relevance of the human resources allocated to the actual worksite assigned to the site 10% -
23 October 2017 - California, US-based spend management group Coupa Software (NASDAQ: COUP) has acquired substantially all assets of California-based spend monitoring company Deep Relevance, Inc.
She stated that Twitter will be able to show search results according to relevance by training its machine learning models.
In past studies, it has been shown that brand familiarity and brand relevance create a positive effect on traditional advertising (Campbell & Keller, 2003).
It was important to find a space that not only supported Relevance New York's rapid growth, but also fostered a collaborative and creative working environment, which we've achieved," said Relevance New York CEO Suzanne Rosnowski.
The relevance of query results represents one of indicators characterizing the quality of information retrieval.
They retained their relevance but it took a new executive director, a new vision, and a new facility.
Elevating Excellence - Defining Choices that Lead to Relevance
This course is designed for the cosmetic chemist to help them understand the very basic principles behind molecular biology, specifically selected biological markers, gene expression and relevance to cosmetic science.
The e-book provides strategies to confront threats to brand relevance.
The concept of relevance and the logic diagram tradition.