A user specifies some keywords they would like to search for, and the search engine answers the query immediately by looking up the indexing result and responding to the user with all the documents that contains the keywords.ĭuring Step 1, the search engine itself doesn't understand format of a document.a file folder or a database, and indexes all documents or newly modified documents, including the various types documents, in the background and creates internal data to store indexing result. The search engine goes through a designated place, e.g.A search engine usually works in two steps: How it works Īn IFilter acts as a plug-in for extracting full-text and metadata for search engines. It also refers to the software interface needed to implement such plugins. They can be obtained as standalone packages or bundled with certain software such as Adobe Reader, LibreOffice, Microsoft Office and OpenOffice. Without an appropriate IFilter, contents of a file cannot be parsed and indexed by the search engine. An IFilter is a plugin that allows Microsoft's search engines to index various file formats (as documents, email attachments, database records, audio metadata etc.) so that they become searchable.
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