Next: 4 Loading the gsmarkup Up: GNUstep Renaissance Previous: 2 Prerequisites and target

# 3 Writing the gsmarkup file

We start by writing a gsmarkup file to create an empty window using GNUstep Renaissance:

    <gsmarkup>

      <objects>

        <window />

      </objects>

    </gsmarkup>

We save this code in a file called Window.gsmarkup. As you can easily see, the code - which is written in the gsmarkup format - is very similar to HTML; as a matter of fact, it is a variant of XML. There are tags (such as `<gsmarkup>`) and each tag is closed after having been opened (for example, `</gsmarkup>` closes `<gsmarkup>`). The syntax `<window />` is equivalent to `<window></window>`, that is, the window tag is opened and immediately closed.

The code starts with `<gsmarkup>`, and ends with `</gsmarkup>`: it's all contained in a `gsmarkup` tag. This is equivalent to an HTML file, which starts with `<html>`, and ends with `</html>`.

Inside the `<gsmarkup>` tag, we find the `<objects>` tag. The `<objects>` tag enclose a list of tags; each of those tags represents an object which is to be created when the file is loaded.

In this case, there is a single tag inside the `<objects>` tag: the `<window />` tag, which tells GNUstep Renaissance to create a single object - a window - when the file is loaded.

Next: 4 Loading the gsmarkup Up: GNUstep Renaissance Previous: 2 Prerequisites and target