PUBLIC MARKS with tag survey

FourthParty is an open-source platform for measuring dynamic web content. Unlike many previous web measurement tools FourthParty is built on a production web browser, Mozilla Firefox, lending it the ability to: monitor realistic interactions with web applications,

Summary: In a comparative survey of data traces from 2000 and 2007, University of Twente researchers found that the nature of the Web has changed from a static one-way medium to a dynamic platform for interactive services such as photo and video sharing portals.

The Web has changed dramatically over the past seven years. During that time the Web has moved from a static one-way medium toward a dynamic platform for interactive services such as photo and video sharing portals. In a comparative survey of data traces served over the Web from 2000 and 2007, University of Twente researchers found that the nature of web sites has changed (Sadre and Haverkort, 2008).

To make the statistics below, I took a set of proxy<->server HTTP transactions between the www.win.tue.nl proxy and off-campus servers (18 days worth of traffic, approximately 150Mb in 14501 HTTP transactions)

The mapreduce scanned approximately 177 million recently crawled HTML documents, parsing and counting rel values in link and anchor tags along the way. In those 177M documents, I found just over 19 billion <a> and <link> tags in total. And of those 19B tags, 1.8 billion of them contained a non-empty rel attribute.

By completing this survey you will help inform development choices for those creating accessible web content. All screen reader users (even those that use screen readers only for evaluation and testing) are invited to participate.

For the experiments run on 15 to 17 December 1997, the percentages of invalid links were, from best to worst, 1.6% for Lycos, 2.0% for Excite, 2.5% for AltaVista, 2.6% for Infoseek, 5.0% for Northern Light, and 5.3% for HotBot (pages that timed out were not included in these statistics). In comparison with the results of similar experiments performed in August 1997, the ranking of the engines in terms of the percentage of invalid links has changed significantly.