Is it possible to inline a class definition of CSS inside an xhtml file?
I mean, to put someting like:
p.first{ color: blue; }
p.second{ color: red; }
Inside my page, not in a separate CSS file.
I think you're trying to put your CSS in the HTML page, not inline.
You can put CSS in an HTML page (usually in the head) by surrounding it in style tags:
<style type="text/css">
p.first{ color: blue; }
p.second{ color: red; }
</style>
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