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@kjetilk left a number of helpful comments on the vocab tutorial that we might want to consider integrating.
Great example, but I think it should mention that there tons of vocabs, and that in most cases, you'd just use somebody else's rather than create your own, it is even considered best practice.
I think it would be better to use Turtle's short a than rdf:type, even though it is a syntax specific thing.
One of my things is "Don't use hyphens, use underscores instead, because it simplifies using them in some programming languages." :-)