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What is the .RAT File Extension?

.RAT File Extension Description:

The RAT file extension identifies the rating system file for the Platform for Internet Content Selection (PICS). This file contains the resulting data of PICS-based evaluation implemented on the World Wide Web as rating labels. As a PICS rating system, it represents a set of vocabulary and categories that are called when evaluating a specific domain.

PICS is a standard rating system and rating information developed by the World Wide Web Consortium for filtering Web content. Minors who can freely access adult content conceived it as a response to the growing problem of unmanaged or uncontrolled use of Internet. Ratings managed by PICS are recognized and widely used especially by home users to guarantee safe Internet use for minors.

PICS have designed a metalanguage used to define the various categories and values used for rating content. The file with the .rat file extension and the rating label are both stored on the root file system of a computer server in order to use the PICS-generated data in filtering Internet content on your machine. This file is saved on the system, which then automatically updates the file as well as the PICS configuration file.

Both the file with the .rat file extension and the rating label stored on the file system can be used on the server with appropriate configuration so that it will be able to send labels upon request of client. Copies of these files and the entries for the PICS configuration files can be acquired from any web-based rating service. Take note that the labels have to be stored one label per file on the server's file system.

With the PICS system integrated in a server, parents are given the ability to optionally block out content that they think their children should not view. Web browsers can be made 'PICS-aware', so that before displaying content, the client software compares the values set by the parent against the rating labels for the content. It is the file with the .rat file extension that is used by the browser as reference for the level of accessibility of the Web content.

Author: World Wide Web Consortium (,WC3),
Author URL:
Related Applications: PICS Rating System
Common Path: N/A


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Do you have errors with .RAT files?

What Causes .RAT files Errors?

.RAT files errors are possibly severe Windows registry errors and are brought on by a corrupt program registry that needs to be repaired at once to avoid further failure in other software and/or devices. During the time the errors remain your system stays capable of possible blue screen errors, hardware failure and fatal crashes.

What are the Symptoms of .RAT files Errors?

.RAT files errors produce numerous symptoms, including: personal computer freezes on start up or shut down, softwares halt, decreased computer speed, built-in speaker beeps, problems saving files, slow system behaviour and application installation failure.

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How to Fix .RAT File Extension Errors    |    Repair .RAT File Errors    |    What is the .RAT File Extension?