Key Cite
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| Subsidiary | |
| Industry | Publishing |
| Products | Caselaw, Articles, Publications, News, Court Documents, Lawyer Marketing, Law Practice Management Tools |
| Parent | Thomson Reuters |
| Website | www.westlaw.com |
Westlaw is one of the primary online legal research services for lawyers and legal professionals in the United States and is a part of West. In addition, it provides proprietary database services. Information resources on Westlaw include more than 40,000 databases of case law, state and federal statutes, administrative codes, newspaper and magazine articles, public records, law journals, law reviews, treatises, legal forms and other information resources.
Most legal documents on Westlaw are indexed to the West Key Number System, which is West's master classification system of U.S. law. Westlaw supports natural language and Boolean searches. Other significant Westlaw features include KeyCite, a citation checking service, which customers use to determine whether cases or statutes are still good law, and a customizable tabbed interface that lets customers bring their most-used resources to the top. Other tabs organize Westlaw content around the specific work needs of litigators, in-house corporate practitioners, and lawyers who specialize in any of over 150 legal topics. Most customers are attorneys or law students, but other individuals can also obtain accounts.
Westlaw was originated by West Publishing, a company whose headquarters have been in Eagan, Minnesota since 1992; West was acquired by The Thomson Corporation in 1996. Several of Thomson's law-related businesses outside the United States have their own Westlaw sites, and Westlaw's international content is available online. For instance, Westlaw Canada from Carswell includes the Canadian Abridgment and KeyCite Canada, and Westlaw UK provides information from Sweet & Maxwell and independent law reports, case analysis and case status icons. More recently, Westlaw China was introduced, with laws and regulations, cases, digests, and status icons (similar to KeyCite flags), for the law of the People's Republic of China. Westlaw Ireland (IE) was established in 2002, covering information found in Round Hall publications as well as legislation, books, cases, current awareness and full-text articles from many of the country's notable legal journals. In total, Westlaw is used in over 68 countries.
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