sted Pilog Queries</a></h3>

<p>In the most general case, a generator clause can be an arbitrary Pilog query.
Often this is a query to a database on a remote machine, using the <code><a
href="refR.html#remote/2">remote/2</a></code> predicate, or some other resource
not accessible via database indexes, like iterating a <code><a
href="refL.html#+List">+List</a></code> of <code><a
href="refL.html#+Link">+Link</a></code>s or <code><a
href="refJ.html#+Joint">+Joint</a></code>s.

<p>Syntactically, such a generato