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About THOMAS


Background | THOMAS Databases | How Often Is THOMAS Updated? | THOMAS Usage Statistics | About InQuery | THOMAS Button

BACKGROUND
Acting under the directive of the leadership of the 104th Congress to make Federal legislative information freely available to the Internet public, a Library of Congress team brought the THOMAS World Wide Web system online in January 1995, at the inception of the 104th Congress. Searching capabilities in THOMAS were built on the InQuery information retrieval system, developed by the Center for Intelligent Information Retrieval based at the University of Massachusetts at Amherst.

The first database made available was Bill Text, followed shortly by Congressional Record Text, Bill Summary & Status, Hot Bills (no longer maintained), the Congressional Record Index, and the Constitution (now found, along with other historical Congressional documents, under the "Historical Documents" category on the THOMAS home page). Enhancements in the types of legislative data available, as well as in search and display capabilities, have been continuously added.

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THOMAS DATABASES
THOMAS currently offers the following databases:

  • LEGISLATION:

    In addition to THOMAS databases, the THOMAS home page provides these links of interest to the legislative searcher in the column to the left of the main body of the homepage.

  • SUMMARY OF CONGRESSIONAL ACTIVITY:

     

  • HISTORICAL DOCUMENTS:

  • US Congressional Documents and Debates: 1774-1873

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    HOW OFTEN IS THOMAS UPDATED?
    As soon as new files are received from the Government Printing Office (GPO), they are indexed and made available for searching. The bill text files are updated several times throughout the day. The Congressional Record files are received once a day, when Congress is in session, usually in the morning. Committee reports arrive intermittently, after they are published by GPO, and are indexed when they arrive.

    Information about bills in the Bill Summary & Status files: Typically, basic information about a bill or resolution, including the sponsor and cosponsor(s), committee of referral (if appropriate), short title (if any), official title, status steps, chronology of actions, and Congressional Record page number references, appears in the Bill Summary and Status file within 24 to 48 hours after introduction of or action on the measure. Changes in a bill's status are generally available the next day. A link to a bill's full text is created as soon as the text is received from the Government Printing Office, usually within 24 to 48 hours of introduction or action. Index terms, digest, and revised digests, which require analysis of the text, are available as soon as 48 hours after introduction or action, depending on the complexity of the measure and the volume of legislative activity. The file is updated daily.


    THOMAS USAGE STATISTICS

    In 2003, THOMAS transmitted 117,916,977 files, comprising 158,625,770,393 bytes (1.59 terabytes) of information.

    On average, 323,060 files (or 4,345,911,518 bytes) were transmitted every day.


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    ABOUT INQUERY

    Searching in THOMAS is done under the InQuery information retrieval system, developed by the Center for Intelligent Information Retrieval based at the University of Massachusetts at Amherst.

    InQuery employs a relevance-ranking algorithm for searching, and displays search results with the most-relevant items appearing first on the results list. Experienced searchers who wish to use Boolean searching may use native InQuery syntax to override the relevance-ranking default.

    To learn more about how InQuery works in the THOMAS system, choose from among the following topics:

    To learn more about InQuery in general, visit Sovereign Hill Software's pages:

    A THOMAS BUTTON FOR YOUR WEB PAGE
    If you want to build a link from your Web page to THOMAS, using a colorful graphical button, copy this code to make the button on your Web page:

    <a href="http://thomas.loc.gov">
    <img src="http://thomas.loc.gov/images/link.gif" 
    alt="[Link to THOMAS Home Page]"></a>
    

    Your button will look (and act) like this:

    [Link to THOMAS Home Page ]

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    Graphic Design by Black/Pickett, Information Technology Services, Library of Congress

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