Stylesheets & Instances

Instances are associated with stylesheets by adding a processing instruction at the top.
```
<?xml-stylesheet type="text/css" href="mystyle.css"?>
```

In XHTML, there is also a special element for this:

<link type="text/css" href="mystyle.css" rel="stylesheet"/>

which is in the 'head' element:

<html>
<head><title>My Document</title>
<link type="text/css" href="mystyle.css" rel="stylesheet"/>
</head>
<body>...</body>
</html>