The associative link consists of a destination node and a source node, where both nodes usually reside in different documents. Using links it is possible to create a semantic web between information nodes. A reader of such documents can follow links depending on his or her interests. Systems such a HyperCard and Oracle's on-line help already implement a simple form of hypertext, where the user navigates from one explanation to the next. The WWW is a hypertext where the nodes are distributed throughout the Internet.
Nodes can contain text, images, sound, or animations.
WWW browsers provide the user interface to view and navigate the hypertext. WWW documents, essentially, do not define how a document is to be viewed. Each browser determines the presentation of the structural information of a WWW document. The following shows an example of HTML use. Welcome to the world of HTML this is the first paragraph.