Overview of metasearch engine
A metasearch engine takes data from a search engine and finds a match or a similar data between the data. It then fetches the results and presents them to the user. Metasearch data includes the following: date range, ranking, descriptions, Frequencies, tabindex, global topics, location, css-templates, lr, timestamp, jid, meta tags, prefix, domain, resp.site, About (added by you), limited tables, reciprocal links
How does metasearch work?
Ø To start with, metasearch starts with a database of meeting information, which is summarized in a XML file. Then, a matching engine is developed on the basis of the XML information. During the search, the engine will look for the occurrence of a particular prefix. It will then populate the result set with one of the found strings.
Ø Metasearch Architecture:Data are stored in three main tables:
Local Information Files
These are stored in alphabetical order below the category/tag of the source. It contains the date, the time, the source and the target information.
Global Information Files
These are stored in sorted list going from the newest to oldest information. The global differences are would mostly be in the date and time.
How does metasearch work?
These engines sort the data according to the entity name. The matching algorithms make use of field types, both structured and unstructured, to find the appropriate data. The engine will also require the specify object names and the Dictionary file.
Ø Search Engines:These are the companies that use the metasearch facility
Ø Trusted Identities Service
These are trusted external matching resources that use the community self-healing networks to look for information of mutual interest. They will also accept the trusted addresses to initiate communication.
Ø The subject guides are organized by the editors keeping in view the institutes that are of sufficient scope and are well equipped with the relevant publications.
SubjectGuides are trusted information sources as they accept specified domain names and distribute them to the logged-in users.
Ø Search Engines
These companies use a combination offummer search engines for the searching of a full-text search on a particular subject.
Ø The search engines are web-based, and the users can search the texts from the actual website only. These engines give the opportunity to the user to search the full-text version of the specified text.
Subject guides are defined as a subject based on a fulfilled or open relationship (whether the user and the site agree or not).