I've used the Notepad++ application to edit before, usually HTML. But, now, I'm using it to edit Archibus views.
When chatting with my friend, James Castruccio, he mentioned I should be able to tweak a setting in Notepad++ that would automatically apply the XML formatting to the AXVW files when I opened them, rather than manually selecting it from the Language menu every time.
I poked around a little and couldn't see an obvious setting, so, I did what any self-respecting cad geek would do, and posted a question on the AUGI Forums.
Richard Lawrence provided the solution I used.
Under the Settings menu, click the Style Configurator