- From: David Robillard <d@drobilla.net>
- Date: Wed, 29 Feb 2012 15:29:15 -0500
- To: Henry Story <henry.story@bblfish.net>
- Cc: public-rdf-comments@w3.org
On Sun, 2012-02-26 at 10:43 +0100, Henry Story wrote: > In section 5.3 of the latest Turtle editors draft [1] I read > > [[ Beginning the collection production records the curSubject and > curPredicate, sets curSubject to a novel blank node Bhead and sets > curSubject and curPredicate to Bhead and rdf:first respectively. Each > object O in collection allocates a novel blank node Bn, creates an > additional triple curSubject rdf:rest Bn . and sets curSubject to Bn. > Finishing the collection production creates an additional triple > curSubject rdf:rest rdf:nil . and restores curSubject and curPredicate > The node produced by matchingcollection is the blank node Bhead. ]] > > Is this correct? It is incorrect for empty lists as you have noticed. > In most programming languages one thinks of Nil as itself a list (just the empty one). > So one thinks that > > :tasks todo () . > > as equivalent to > > :tasks todo rdf:nil . Yes, that is actually what you do. The spec should probably just describe this base case explicitly. -dr
Received on Wednesday, 29 February 2012 20:29:39 UTC