<para>
This chapter describes the GIR XML markup format.
- are interested in the procedure which GTK+ follows to draw its
- widgets and windows, you should read this chapter; this will be
- useful to know if you decide to implement your own widgets. This
- chapter will also clarify the reasons behind the ways certain
- things are done in GTK+; for example, why you cannot change the
- background color of all widgets with the same method.
</para>
<section id="gi-gir-api">