XLink
XLink provides links similar to hyperlinks. XLink enables you to define link elements in your DTD. XLink elements can have the following attributes: type, href, role, title, show, and actuate. There are two types of XLinks, simple and extended. A simple link connects two resources: a source and a destination. An extended link connects any number of resources. In this section, let's take a look at these two types and the attributes defined in XLink in detail.