[rules-users] Using from with named queries

Hello list, I'm using Drools.5.0.1 and I am trying to comprehend how to used the "from" keyword over a named query. I've googled this: http://blog.athico.com/2007/06/chained-from-accumulate-collect.html where it states: p : Person( ) Restaurant( food == p.favouriteFood ) from hs.getNamedQuery( "list restaurants by postcode" ) .setProperties( [ "postcode" : p.address.zipcode ] ) .list() If I understand the above correctly, the "hs.getNamedQuery" returns "Restaurant" objects using values from "Person" object. There are a couple of issues that I would like to resolve. Where and how is the "hs" object in "hs.getNamedQuery" statement is declared? If the "Person" object itself is the result of a NamedQuery, could the above statement be rewritten as: p : Person( ) from ps.getNamedQuery("return list of persons") Restaurant( food == p.favouriteFood ) from hs.getNamedQuery( "list restaurants by postcode" ) .setProperties( [ "postcode" : p.address.zipcode ] ) .list() Thank you for your time. -Stathis PS: Please take note that this is a newbie (in Drools) speaking.