Are there existing XML vocabularies and applications?
As developers began to use XML for various applications, standard vocabularies, or XML applications, began to emerge. For example, XHTML is an XML version of HTML, and podcasting takes place using various flavors of an XML vocabulary called RSS. The Scalable Vector Graphics (SVG) language provides a way to define graphic images using XML in a way that browsers such as Firefox can render them. Some examples of XML in action are discussed below.