Vector Markup Language (n)~ An XML-based specification for the exchange editing and delivery of 2-D vector graphics on the Web. An application of XML (Extensible Markup Language) VML uses XML tags and Cascading Style Sheets to create and place vector graphics such as circles and squares in an XML or HTML document such as a Web page. These graphics which are rendered in the native operating system can include color and are editable in a variety of graphics programs.