Style Guide for Online Hypertext
When writing for the Web, the documents usually become part of a larger collection. It's important that the site follows a common structure so all documents are available in a logical place. For a document, the style is also very important. By using a common style, you ensure that a reader can use the site effectively. Some important aspects are indicating the status of the document, using images and icons, and writing in a device-independent way.
Engelfriet, Arnoud. Web Design Group, The (1997). Reference>Style Guides>Web Design>Writing