From: itsme213 <itsme213@...>
Date: 2005-01-22T01:45:56+09:00
Subject: Re: Xpath like syntax


> x[:countries][:provinces][:cities, {:name=>"London"}]

You should treat [:countries], {:name=>"London"}... as convenient sugar for
a general case of a block at any query stage e.g.
x[:cities]{|c| c.population > c.houses.capacity.sum}[:streets]

And if you prefer "." syntax, you could use Jim Wierich's BlankSlate and
catch method_missing so x.cities does the same as x[:countries].

If you really get into this, you could do not just filtering (select/project
combinations), but create new nodes i.e. full transformations.