W3C home > Mailing lists > Public > public-ldp@w3.org > March 2013

Re: A modest attempt to re-open ISSUE-20

From: (wrong string) čius <martynas@graphity.org>
Date: Thu, 14 Mar 2013 18:28:36 +0200
Message-ID: <CAE35Vmz-g6LBznjV9kKkP6ArPe8VNX3f+Z4-5_RQew+zg37Cfg@mail.gmail.com>
To: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
Cc: James Leigh <james@3roundstones.com>, "public-ldp@w3.org" <public-ldp@w3.org>

consider that
a) the resource describing person already exists, and person's URI is known.
You POST RDF about the persons URI (to be appended to resource description).
b) the resource describing person does not exist.
You mint new URIs of the resource and the person and PUT the RDF into
resource's URI.

What's wrong with that? A client could that automatically.


On Thu, Mar 14, 2013 at 6:11 PM, Pierre-Antoine Champin
<pierre-antoine.champin@liris.cnrs.fr> wrote:
> James,
> On Thu, Mar 14, 2013 at 3:07 PM, James Leigh <james@3roundstones.com> wrote:
>> On Thu, 2013-03-14 at 10:03 +0100, Henry Story wrote:
>> >
>> > The relevant section of the Turtle spec is section 6.3
>> > http://www.w3.org/TR/turtle/#relative-iri
>> >
>> >
>> > Notice that you cannot use NTriples to do what you want either, since
>> > you cannot
>> > know when creating a resource what the URI of the created resource is
>> > going to be.
>> > You would need to only use blank nodes in the graph produced, which
>> > would be
>> > to say the least very awkward.
>> In Callimachus, when a resource is created there is no funny base-uri
>> going on (we use the RDF model). Although we use sparql-update format,
>> any RDF format would work equally well for us including NTriples.
>> Lets calls the to-be-created resource URI the entity URI. All the
>> triples that are to-be-inserted to the store must either have a blank
>> node subject, have a subject URI of the entity URI, or have a subject
>> URI of the entity URI plus a fragment identifier. This makes it very
>> clear what the entity URI is.
> But it prevents you from POSTing an *incoming* graph to the entity
> resource...
> What if I want to create a person and state that "I know this person" ?
>   pa
>> It is up to the client to decide if that
>> entity URI is serialized as a base directive or absolute (we encourage
>> the client to provide their own base directive). It is up to the server
>> if it will use the entity URI as-is or if it will substitute a different
>> entity URI.
>> Using RDF model for linked data resource creation works, we have a
>> working implementation.
>> Earlier we had experimented with changing base-uri when parsing, but it
>> was too problematic for all the reasons stated in this thread and we
>> replaced it with the above.
>> Regards,
>> James
Received on Thursday, 14 March 2013 16:29:07 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 20:03:10 UTC