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LexisNexis

LexisNexis is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand LexisNexis rather than just read about it. In short: LexisNexis is an American data analytics company headquartered in New York. Its products are various databases that are accessed through online portals, including portals for computer-assisted legal research (CALR), newspaper search, and consumer information.

LexisNexis — main illustration
LexisNexis — illustration

Key takeaways

  • LexisNexis belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect LexisNexis to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of LexisNexis from memory before moving on to harder problems.

Reference excerpt

LexisNexis is an American data analytics company headquartered in New York. Its products are various databases that are accessed through online portals, including portals for computer-assisted legal research (CALR), newspaper search, and consumer information. During the 1970s, LexisNexis began to make legal and journalistic documents more accessible electronically. As of 2006, the company had the world's largest electronic database for legal and public-records–related information. The company is a subsidiary of RELX.

History

LexisNexis is owned by RELX (formerly known as Reed Elsevier). According to Trudi Bellardo Hahn and Charles P. Bourne, LexisNexis (originally founded as LEXIS) is historically significant because it was the first of the early information services to both envision and actually bring about a future in which large populations of end users would directly interact with computer databases, rather than going through professional intermediaries like librarians. The developers of several other early information services in the 1970s harbored similar ambitions (e.g., OCLC's WorldCat), but met with financial, structural, and technological constraints and were forced to retreat to the professional intermediary model until the early 1990s. An attorney named John Horty began to explore the use of CALR technology in 1956 to support his work on comparative hospital law at the University of Pittsburgh Health Law Center. Horty was surprised to discover the extent to which the laws governing hospital administration varied from one state to another across the United States and began building a computer database to help him keep track of it all. In 1965, Horty's work inspired the Ohio State Bar Association (OSBA) to independently develop its own CALR system, Ohio Bar Automated Research (OBAR). In 1967, the OSBA signed a contract with Data Corporation, a local defense contractor, to build OBAR based on the OSBA's written specifications. Data proceeded to implement OBAR on Data Central, an interactive full-text search system originally developed in 1964 as Recon Central to help U.S. Air Force intelligence analysts search text summaries of the contents of aerial and satellite reconnaissance photographs. (Before computer vision was invented, text summaries were manually prepared by enlisted personnel called "photo interpreters"; analysts then used those summaries as a catalog to retrieve photographs from which they could draw inferences about enemy strategy.) In 1968, paper manufacturer Mead Corporation purchased Data Corporation for $6 million to gain control of its inkjet printing technology. Mead hired the Arthur D. Little consulting firm to study the business possibilities for the Data Central technology. Arthur D. Little dispatched a team of consultants from New York to Ohio led by H. Donald Wilson. After Mead asked for a practicing lawyer on the team, Jerome Rubin, a Harvard-trained attorney with 20 years of experience was included. The resulting study concluded that the nonlegal market was nonexistent, the legal market had potential, and OBAR needed to be rebuilt to profitably exploit that market. At the time, OBAR searches often took up to five hours to complete if more than one user was online, and its original terminals were noisy Teletypes with slow transmission rates of 10 characters per second. The original OBAR terminals were belatedly replaced with CRT text terminals in 1970. OBAR also had quality control issues; Rubin later recalled that its data was "unacceptably dirty." In February 1970, Mead reorganized Data Corporation's Information Systems Division into a new Mead subsidiary called Mead Data Central (MDC). Wilson and Rubin, respectively, were installed as president and vice president. A year later, Mead bought out the OSBA's interests in the OBAR project, and OBAR disappeared from the historical record after that point. After Wilson was put in charge, he became reluctant to implement his own study's recommendation to abandon the OBAR/Data Central work to date and start over. In September 1971, Mead's management relegated Wilson to vice chairman of the board (i.e., a nonoperational role) and elevated Rubin to president of MDC. Rubin pushed the legacy Data Central technology back to Mead Corporation. Under a newly organized division, Mead Technical Laboratories, Data Central continued to operate as a service bureau for nonlegal applications until 1980.

… excerpt ends here. Continue reading the full article.

Illustrations

LexisNexis: LexisNexis office in Markham, a suburb of Toronto, Ontario, Canada
LexisNexis office in Markham, a suburb of Toronto, Ontario, Canada
LexisNexis: The old LexisNexis logo
The old LexisNexis logo

Worked examples

Example 1 — a first encounter with LexisNexis

Start with the simplest possible case. Write down what LexisNexis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to LexisNexis before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about LexisNexis ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of LexisNexis

In research
LexisNexis appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses LexisNexis in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
LexisNexis is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1970 establishments in Ohio, 1994 mergers and acquisitions, American subsidiaries of foreign companies, so understanding it makes those chapters shorter.
In everyday life
Look for LexisNexis outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study LexisNexis in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what LexisNexis means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain LexisNexis out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LexisNexis in simple terms?

LexisNexis is an American data analytics company headquartered in New York. Its products are various databases that are accessed through online portals, including portals for computer-assisted legal research (CALR), newspaper search, and consumer information.

Why does LexisNexis matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study LexisNexis?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on LexisNexis.

Tags

  • 1970 establishments in Ohio
  • 1994 mergers and acquisitions
  • American subsidiaries of foreign companies
  • Bibliographic database providers
  • Bibliographic databases and indexes
  • Companies based in New York City
  • Customer relationship management software companies
  • Legal research
  • Legal software companies
  • Online law databases
  • Open-source intelligence
  • Pre–World Wide Web online services

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