- From: Holger Knublauch <holger@topquadrant.com>
- Date: Sun, 01 Mar 2015 18:56:42 +1000
- To: RDF Data Shapes Working Group <public-data-shapes-wg@w3.org>
On 3/1/15 5:24 PM, Jose Emilio Labra Gayo wrote:
> 2.- To allow the core language to have XPATH like functionality and
> variables. It can be something similar to the expressions that appear
> in the FILTER clauses in SPARQL. As an example using the compact
> syntax we could say:
>
> <RectangleShape> { :weidth ?w, :height ?h, :area ?a, FILTER (?w * ?h =
> ?a) }
This looks like it would simply reinvent a new SPARQL, only that no
existing tool would support it yet.
>
>
>
> But generating human-readable error messages can be a post-process
> operation. Embedding that functionality in SPARQL you are preventing
> any implementation that is not based in SPARQL.
Why not? If someone wants to use another language, then this would also
have a mechanism to create strings. JavaScript certainly has. And even
if not, the human-readable messages are purely optional anyway, but
preventing something that is already solved by SPARQL doesn't sound like
a good idea.
Holger
Received on Sunday, 1 March 2015 08:57:15 UTC