The DOM has been one of the W3C's most closely watched initiatives. Level 1, which earned its recommendation in October 1998, focused on support for documents written in HTML and XML. Level 2 encompasses a wider range of W3C-recommended technologies, including Cascading Style Sheets (CSS) and XML Namespaces, which let pages differentiate between distinct XML dialects.
The DOM Level 2 also supports what the W3C calls "events," or a document's response to actions such as mouseovers.
"The DOM Level 2 Recommendation builds on the solid work done in DOM Level 1 and gives Web authors the power to move to XML for dynamic content," Lauren Wood, chairwoman of the W3C's DOM working group and an employee of SoftQuad, said in a statement. "There are now several implementations of the DOM, in different programming languages, which provide the basis of powerful systems meeting the business needs of several large organizations."
Other companies represented on the working group include IBM, Intel, Macromedia, Microsoft, America Online division Netscape Communications, Oracle, Software AG and Sun Microsystems.