The XSL Tools project will focus, specifically on the Transformation engine of the W3C XSL Specification. XSL stands for Extensible Stylesheet Language, and has two core recommands. The XSL Formatting Objects (XSL-FO) and the XSL Transformation language (XSLT). From here on out, when XSL is mentioned, it is talking about the Transformation language.
The XSL Tools project is a Webtools Incubator project. The project goal and background can be found in the XSL Tools Proposal. The scope is to provide basic xsl editing and debugging support to compliment and leverage the existing web standard tools support.
Current status and views of the product backlog can be found on the XSLT Development pages. These pages will be used to show and track progress for each milestone release.