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W3C Open Source Software

About W3C Software

The natural complement to W3C specifications is running code. Implementation and testing is an essential part of specification development and releasing the code promotes exchange of ideas in the developer community. All W3C software is Open Source/ Free Software, and GPL compatible. See the license for details (and the following if you intend to contribute). Note that as this license is GPL compatible, it is possible to redistribute software based on W3C sources under a GPL license.

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List of W3C open-source software releases

Categories	Alphabetic list
Server-side Jigsaw bind ETA Web agents, Parsers, Viewers Amaya CWM IsaViz WebBot WebCon Web Commander Winie Sirpac Authoring tools Amaya slidemaker Validation, lint Charlint CSS Validator Link Checker Log Validator Markup Validator Tidy Manipulation, Libraries Ical2html HTML-XML-utils Libxml libwww RDFPic	Amaya bind Charlint CSS Validator CWM ETA HTML Validator HTML-XML-utils Ical2html IsaViz Jigsaw Libxml libwww Link Checker Log Validator Markup Validator RDFPic slidemaker Sirpac Tidy WebBot Web Commander WebCon Winie

Amaya - a Web browser/editor

First released Feb '97, Amaya is not just a browser, but a hypertext editor. It's a test-bed for the design of embedded objects, stylesheets, math, structured graphics, and more.

BIND patches

Patches to the domain name resolver BIND that we use to rotate www.w3.org to different mirrors around the world according to the IP address of the user. Released August 1999.

Charlint

Charlint, aka "Charlie", is a perl script that allows you to validate or normalize Unicode (UTF-8) data according to the Character Model for the World Wide Web W3C Working Draft.

CSS Validation service: Source code

You can also validate the CSS style sheets used by your HTML pages.

Cwm

Cwm is a general-purpose data processor for the semantic web. It is a forward chaining reasoner which can be used for querying, checking, transforming and filtering information. Its core language is RDF, extended to include rules, and it uses RDF/XML or N3 serializations as required.

ETA - Event Tracking Agent

ETA is a database-backed issue tracking system written in PHP3. Source code is available from our public CVS repository.

HTML Tidy

HTML TIDY is a free utility for fixing HTML mistakes automatically and tidying up sloppy editing into nicely laid out markup. It also works great on the atrociously hard to read markup generated by some specialized HTML editors and conversion tools, and can help you identify where you need to pay further attention to making your pages more accessible to people with disabilities. Tidy further provides a simple way to convert HTML to well formed XML, see WD-html-in-xml.

HTML-XML-utils

A number of simple C programs for manipulating HTML & XML: number headings, make a table of contents, make an index, manage bibliographic references (a simple implementation of refer(1) for HTML), list all links, create cross-references, extract elements that match a (CSS) selector, etc. Most are meant to be used in a Unix pipe or in shell scripts.

Ical2html - export HTML from iCalendar

"Ical2html" reads an iCalendar (.ics) file and extract all events between certain dates and of certain categories and creates an HTML page with monthly calendars. "Icalfilter" filters out events of a given category. See also the development version in CVS.

IsaViz

IsaViz is a visual environment for browsing and authoring RDF models represented as graphs.

Jigsaw - the Advanced Web Server

In June 1996, the release of Jigsaw demonstrated object-oriented web server design, written in Java. While it supports HTTP 1.1, traditional file-based resources, and CGI, its strength lies in its resource-based architecture. On this architecture, it supports advanced proxy caching features including ICP, Servlets, PICS, collaborative authoring, and more.

Libxml - The Gnome/W3C XMLlibrary

Libxml has been in development - mostly as the library for the Gnome project - since 1998. The release 2.0 provides a C toolkit to parse, validate (with XML-1.0 DTDs) and save XML files. It provides flexible I/O interfaces (including basic FTP and HTTP modules), supports pull and push modes, and offers either a C version of the SAX interface or builds a DOM suitable tree. It also supports HTML and provides a version of XPath and XPointer.

Libwww - the W3C Protocol Library

Libwww is a highly modular, general-purpose client side Web API written in C for Unix and Windows (Win32). It's well suited for both small and large applications. Pluggable modules provided with libwww include complete HTTP/1.1 (with caching, pipelining, PUT, POST, Digest Authentication, deflate, etc.), MySQL logging, FTP, HTML/4, XML (expat), RDF (SiRPAC), and much more. The purpose of libwww is to serve as a testbed for protocol experiments.

Link Checker

The W3C Link Checker checks that all the links in your HTML document are valid. There is a command-line interface and an online version.

Log Validator

The Log Validator is a web server log analysis and validation tool: it can help web content managers find and fix the most frequently accessed invalid documents on their Web site.

Markup Validation Service

Install your own Validator to check (X)HTML, SVG, MathML, ...

Slidemaker

This is a Perl script generating HTML slides. It is available from the CVS tree.

RDFPic

RDFPic is a tool to embed an RDF description of a picture into the picture itself, as described by Describing and retrieving photos using RDF and HTTP.

SiRPAC - Simple RDF Parser & Compiler

Having trouble getting your head around Metadata? Parse, check, and visualize RDF. Released July 1998. W3C stopped maintaining this parser in June 2001.

Webbot

The webbot is a very fast Web walker with support for regular expressions, SQL logging facilities, and many other features. It can be used to check links, find bad HTML, map out a Web site, download images, etc. Webbot is part of the libwww codebase.

Web Commander

A Win32 application for getting, saving, and deleting documents remotely using HTTP/1.1. It allows the user to explicitly control the metadata describing the document to save the language, type, charset, etc. Web Commander is part of the libwww codebase. Check the screenshots!

WebCon

WebCon is a simple Web console tool that allows you to perform any HTTP operation automatically like posting data, saving data, deleting documents, etc. The WebCon comes with the libwww codebase.

Winie

Winie is the Java version (and a superset) of Web Commander. It uses Jigsaw's HTTP/1.1 API.

Alumni Software

Arena - a Style Sheets enabled Browser

In 1994, Arena demonstrated the feasibility of tables and math in HTML. In 1995, it began to popularize style sheets. In 1997, W3C development efforts began to focus on Amaya and Arena development moved to Yggdrasil.

CERN Server

The original, first generation HTTP server which some call the Volkswagen of the Web. Development is now discontinued and focus is instead on the modern Jigsaw server.

Downloading, checking and mirroring

Most W3C software is available directly from our CVS base. You can browse the CVS content and its history on the cvsweb front-end. It also carries instruction on how to extract a local CVS tree.

Some of our software is available via FTP from ftp.w3.org.

If you are interested in keeping a local copy of our public FTP or CVS base, both are exported via the rsync protocol from dev.w3.org. Keeping a local mirror of the Amaya distribution for example is as simple as running the following command from a cron entry:

rsync -av dev.w3.org::pub/amaya local_mirror_area