Screen Scraping

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What Does Screen Scraping Mean?

Screen scraping is the process of collecting screen display data from one application and translating it so that another application can display it. This is normally done to capture data from a legacy application in order to display it using a more modern user interface.

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Screen scraping usually refers to a legitimate technique used to translate screen data from one application to another. It is sometimes confused with content scraping, which is the use of manual or automatic means to harvest content from a website without the approval of the website owner.

Screen scraping is sometimes referred to as terminal emulation.

Techopedia Explains Screen Scraping

Under normal circumstances, a legacy application is either replaced by a new program or brought up to date by rewriting the source code. In some cases, it is desirable to continue using a legacy application but the the lack of availability of source code, programmers or documentation makes it impossible to rewrite or update the application. In such a case, the only way to continue using the legacy application may be to write screen scraping software to translate it into a more up-to-date user interface. Screen scraping is usually done only when all other options are impractical.

The screen scraping application must usually do both of the following:

  • Capture screen input and pass it on to the legacy application for processing
  • Return data from the application to the user and display it properly on the user’s screen

For example, screen scraper software is available to take the output from a legacy application running on an IBM mainframe and use it as input for an application running on a PC.

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Margaret Rouse
Technology Expert
Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.