In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "We can include other contexts through the use of the include directive."

A block of code is set as follows:

<video src=turkish.ogv width=320 height=240 poster=turkish.jpg>
  Download the <a href=video.ogg>Turkish dancing masterclass video</a>
</video>

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

<video width=320 height=240 controls poster=turkish.jpg>
  <source src=turkish.ogv type=video/ogg>
<source src=turkish.mp4 type=video/mp4>
  Download the <a href=video.ogg>Turkish dancing masterclass video</a>
</video>

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text "clicking the Next button moves you to the next screen".