FLUD Format and Parser | Download | Installation | Operation | Results


One of the research areas of the NIST Web Metrics Testbed is how to record the behavior of users as they attempt to perform given tasks during interaction with a Web-based application. The captured log data can be valuable for analyzing and improving the usability of such applications. This log data is quite complex and therefore a common file format is needed to allow various software components (such as recorders, parsers, analyzers, and visualizers) to exchange information. The goal then is to establish a Framework for Logging Usability Data - hence: "FLUD". NIST Special Publication 500-248 provides a full explanation of the design and rationale for FLUD.


The parser accepts a logfile formatted as defined in the FLUD specification. It can generate three kinds of output: a parse file, a pretty-print HTML file, and a set of userpath files for VisVIP. A logfile represents the activity of one subject during a single test session.

Here is an example of a raw logfile and its pretty-printed representation.

FLUD is a tool in the Web Metrics Testbed developed at NIST. For more information, see http://www.nist.gov/webmetrics. Direct all comments and questions to webmetrics@nist.gov. Before using this tool, please review the FLUD release notes and known bugs.

See NIST Web Metrics disclaimer.

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Version 1.1
Page last modified: 15 May 2002
National Institute of Standards and Technology (NIST)