W3C home > Mailing lists > Public > public-data-shapes-wg@w3.org > March 2016

Re: shapes-ISSUE-130 (rdf dataset assumption): SHACL should not assume that the data graph is in an RDF dataset [SHACL Spec]

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Mon, 21 Mar 2016 10:44:40 -0700
To: Dimitris Kontokostas <kontokostas@informatik.uni-leipzig.de>, Holger Knublauch <holger@topquadrant.com>
Cc: RDF Data Shapes Working Group <public-data-shapes-wg@w3.org>
Message-ID: <56F03308.6070804@gmail.com>
I think that Dimitris's implementation does work on endpoints.

The implementation that I am putting together will work on endpoints as well.

peter


On 03/21/2016 04:12 AM, Dimitris Kontokostas wrote:
> Found it, https://www.w3.org/2015/08/27-shapes-minutes.html#resolution03
> the resolution does not say this but iirc the discussion (which is not 100%
> scribed) was talking about bnodes and how they can be identified with a remote
> call vs in-memory.
> ARQ and Sesame do something clever with bnodes which is not the case for all
> sparql engines but I am not trying to re-open the old issue, only trying to
> close this one using that resolution
> 
> I propose we close this issue as: SHACL does not assume that the data graph is
> an RDF dataset as addressed by the current editor's draft
> This of course allows people to use datasets but SHACL doesn't take any
> special care in this case
> 
> 
> On Mon, Mar 21, 2016 at 12:59 AM, Holger Knublauch <holger@topquadrant.com
> <mailto:holger@topquadrant.com>> wrote:
> 
>     On 18/03/2016 18:38, Dimitris Kontokostas wrote:
>>
>>     On Fri, Mar 18, 2016 at 9:41 AM, Peter F. Patel-Schneider
>>     <<mailto:pfpschneider@gmail.com>pfpschneider@gmail.com
>>     <mailto:pfpschneider@gmail.com>> wrote:
>>
>>         If it is always possible to construct the dataset, then I don't see
>>         a problem
>>         either.  However, is this always possible?  For example, a user who
>>         is just
>>         trying to validate a graph may not have permissions to create or
>>         modify a dataset.
>>
>>
>>     iirc there was a resolution on supporting only in-memory validation (not
>>     my favorite and cannot find it), e.g. full shacl may not run on remote
>>      datasets e.g. sparql endpoints. 
>>     With this in mind an implementation could just copy the shapes & data
>>     graph in memory and perform the validation there
> 
>     The resolution that we made a while ago was to not require support for the
>     SPARQL endpoint protocol. Note that this is different from the question of
>     in-memory vs database. It means that implementations can still work
>     against databases, e.g. via an API such as ARQ or Sesame (for which all
>     major databases provide drivers for), while the SPARQL endpoint protocol
>     is too limiting for what SHACL needs to do.
> 
>     Holger
> 
> 
Received on Monday, 21 March 2016 17:45:11 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 19:30:30 UTC