Developer tip

It is good practice for all but the simplest documents to indicate their structure through headings and sub-headings. Using structural markup, rather than formatting effects, allows easier adaptation of content where it needs to be divided into several pages, as well as potentially facilitating access to the sections of the document that a user is interested in. Where headings are used they should be used in accordance with the specification, i.e. they should be properly nested according to their level