frasøsøk

Frasøsøk is a term used in Norwegian information retrieval to denote search functionality that retrieves documents containing a specific sequence of words, i.e., a phrase. It relies on indexing strategies that preserve word order, such as positional inverted indexes or n-gram indexes, enabling exact phrase matches as well as near-phrase matches with tolerance for punctuation and stopwords.

Etymology and usage: The word is a compound of Norwegian terms related to phrase and search; it appears in Norwegian technical discussions and vendor documentation as shorthand for phrase-based querying.

Technical aspects: Implementation typically involves building an index that records the position of each term within documents, enabling efficient phrase querying. Query processing may include normalization (case folding, stemming), stopword handling, and ranking using standard information retrieval models (e.g., BM25) with additional phrase constraints. Some systems support flexible phrase matching, where terms may be separated by a small number of intermediate words.

Applications: Frasøsøk is especially valuable for exact quoted phrases, titles, legal clauses, literary quotes, patent claims, and any domain where word order is semantically important.

Limitations: Phrase search can be more resource-intensive than bag-of-words search; performance depends on index design and query complexity. Handling inflection, synonyms, or multilingual text may require additional natural language processing.

See also:

- information retrieval

- phrase search

- inverted index

- proximity search

- keyword search

Further reading: general information retrieval texts and documentation on search engine indexing and query processing.

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