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: "The role attribute is a simple string whose values and significance is defined by the type of the relation itself."

A block of code is set as follows:

<osm version="0.6" generator="OpenStreetMap server">
  <node id="483034256" lat="55.9458449" lon="-3.2035477" version="1" changeset="2369219" user="spytfyre" uid="166957" visible="true" timestamp="2009-09-04T13:35:42Z">
    <tag k="name" v="The Blue Blazer"/>
    <tag k="amenity" v="pub"/>
  </node>
</osm>

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

<osm version="0.6" generator="OpenStreetMap server">
  <node id="107775" lat="51.5072647" lon="-0.1278328" version="29" changeset="2628959" user="EdinburghGael" uid="170586" visible="true" timestamp="2009-09-25T23:04:28Z">
    <tag k="place" v="city"/> <tag k="name:zh" v="伦敦"/> <tag k="name:sv" v="London"/> <tag k="name:sk" v="Londýn"/> ... <tag k="is_in" v="England, United Kingdom, UK, Great Britain, Europe"/> <tag k="capital" v="yes"/> <tag k="name:fr" v="Londres"/> <tag k="name:cy" v="Llundain"/>
  </node>
</osm>

Any command-line input or output is written as follows:

Kosmos.Console.exe bitmapgen compton.kpr compton.png -mb 51.20868 -0.63794 51.22011 -0.61772 -z 16

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 like this: "You can do this by right-clicking on your My Computer icon and selecting Properties."

There are some images that are referred in the chapters but are not actually present in it. Such images can be found along with the code files on the Packt website. The images are referred as follows: "The road's name is Down Lane, which can be seen in the image 121120009090.jpg."