[Mulgara-general] Queries on WebUI Vs. SPARQL Endpoint

[Alex Hall]

Paul Gearon wrote:
> On Wed, Jul 22, 2009 at 10:38 PM, Sands Fish<sands at mit.edu> wrote:
>> On Jul 22, 2009, at 11:07 AM, Alex Hall wrote:
>>
>>> Sands Fish wrote:
>>>
>>>> Am I missing something glaring?  I tried with/without the trailing
>>>> slash, using the default-graph-uri parameter and including it directly in
>>>> the query.  Nothing seems to yield the results I get in the webui.
>>> The URI <rmi://dhcp-18-111-23-130.dyn.mit.edu/server1#> refers to the
>>> system graph, which is a special graph that holds system metadata.  I'm
>>> not all that familiar with the internal workings of the WebUI, but I
>>> think that it lets you specify an alternate graph URI that overrides the
>>> one in the FROM clause.
>> My memory says that the alternate graph uri is only used when there isn't
>> one present in the query, but I don't have time to look it up at the moment.
> 
> No, that's not the case. I used to think that too, but then I was
> corrected (by someone reading this list, isn't that right Andy?)  :-)
> The justification is that this option allows an easy mechanism to
> override the graph for a pre-built query.

I was originally referring to the "Graph URI" field in the WebUI.  I'm a
bit unclear as to the logic of that -- is it simply translated to a
default-graph-uri value?  What happens if you don't fill in a graph URI?

Regards,
Alex