Question

WEB BASED SYSTEMS DEVELOPMENT SUBJECT

definition of DOM

Answer 1

Document Object Model (DOM) : It is a set of platform independent and language neutral application programming interface (API) which describes how to access and manipulate the information stored in XML,XHTML and JavaScript documents.

The document object modeling(DOM) is for defining the standard for accessing and manipulating XHTML,XML and other scripting languages. It is the W3C recommendation for handling the structured documents. Normally the structured information is provided in XML,XHTML and many other documents. Hence DOM provides the standard set of programming interfaces for working with XML and XHTML and JavaScript.

Levels of DOM:

DOM(0) : This model is supported by the early browsers.This level could support JavaScript. This version was implemented in Netscape 3.0 and Internet Explorer 3.0 browsers.

DOM(1) : This version was issued in 1998 which was focused on XHTML and XML.

DOM(2) : This version was issued in 2000 that could specify the style sheet. It also supports the event model and traversal with in the documents.

DOM(3) : This is the current release of DOM specifications published in 2004. This version could deal with XML with DTD and schema,document validations, document views and formatting.