As a fundamental part of the Web, hypertext linking has been the subject of repeated attempts at standardization beyond the basic format allowed in simple HTML. Such attempts can be characterized as efforts to balance machine processing ability with authoring convenience. The latest specification in this area, XHTML 2.0, just might have gotten it right.
A number of markup technologies involve attaching behaviors to specific parts of a document. XML Events is a W3C Recommendation that allows declarative attachment of a behavior -- which can be a predefined bundle of actions defined in XML or a more general call to a scripting language -- to a specific element. This article gives an overview of how XML Events came about, what it's useful for, and how it works.