Arthur; Let us know how you'd like to walk through
all the security issues of modifying data through a SPARQL
endpoint. Generally speaking, this is a difficult issue and a
reason to use SPARQLMotion (or the equivalent) that can negotiate
user access rights. SPARQL endpoints are just not built to do
that yet AFAIK.
-- Scott
On 2/17/2014, 10:50 PM, Arthur A. Keen
wrote:
Holger,
Thanks, I had forgotten that the .tdb and .sdb files are just
connector files standing in for the graphs in the workspace and
pointing at the database. Interestingly, it actually loaded my
files into named graphs when I used the SPARQL's
LOAD <file:/...myfile.ttl> INTO GRAPH <graphname>
and then let me query them. It would be nice to be able to do
this kind of thing against SPARQL endpoints directly in Composer
with an endpoint connector (without using SERVICE)
A
Hi Arthur,
I wish you could use TopBraid 4.5 which has this
improved ;)
On 2/18/2014 10:32, Arthur A. Keen wrote:
1)
Is the intended use in Composer that
you only have one graph per TDB
instance?
No you can have multiple named graphs per TDB, but (up
to 4.5) you need to have one connector file (.tdb) for
each named graph.
2)
If multiple graphs are allowed, and I
create multiple named graphs in a TDB
instance, is there a way to switch
between these named graphs in
Composer?
Yes, just open their individual .tdb files - assuming
they point to the same data folders.
3)
Is INSERT DATA only supported for the
default graph, and not into a named
graph?
Probably follows.
BTW the named graph support has already been improved
in the upcoming 4.4 release for *SDB*, if that's an
option.
There, you can
access any subgraph of a given .sdb connector as long
as the subgraph starts with the same URI, e.g. you
have
http://example.org/mySDB
as a .sdb file
then you can access any
http://example.org/mySDB/mySubGraph1
via SPARQL, e.g. INSERT { GRAPH ?graph { ...
and the same will work for TDB in 4.5 (whenever this
comes out). Meanwhile, create multiple .tdb files.
HTH
Holger
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