[Meta] Topic Hierarchy

I was reviewing the topic hierarchy [1] and came across a few things 
that could need clearing up.

First, Why is there a separate top URL for guides and tutorials? We can 
have sub-urls of the technologies and have all the guides and/or 
tutorials categorized by their technology as well.

Second,  What is the servery of the priority status codes?  P0 = Most 
important or least?


[1] http://docs.webplatform.org/wiki/WPD:Content/Topic_Hierarchy

Thanks,
-Garbee

<http://docs.webplatform.org/wiki/WPD:Content/Topic_Hierarchy>