(moving to fedora users)
On 10/29/2008 11:15 PM, Benjamin O'Steen is rumored to have said:
<snip/>
> Some documentation on the limits/breadth of support would be most
> appreciated, as the statement 'SPARQL support' might pose problems for
> managing user expectations.
I'm not positive what the latest state of SPARQL support in Mulgara
is--it's either complete or just about. Mid-summer (before Mulgara
2.0.0), about 95% of SELECT queries were supported, where the main thing
missing was ordering by expression instead of by a variable. Also at
that time, ASK, DESCRIBE and CONSTRUCT were not supported, but these are
now supported (or at least I see the code for it now).
> (So far, I have got the in-vm mulgara to understand a SELECT query, but
> it fails to reply with any results. A person with only SPARQL experience
> might be similarly stuck.)
You'll still need to include a FROM clause in your SPARQL query if that
helps (e.g. "select * from <#ri> where { ?s ?p ?o }")--there's no
default model set, which come to think of it, we should consider doing.
> On a similar note, I was also interested in having an external Mulgara
> store coupled to Fedora. If anyone has a walkthrough on how to set this
> up, I'd love to read it. I have set the host param in the fedora.fcfg,
> and have Mulgara's web UI happily running on /risearch. However, I
> haven't been able to guess the process for creating the graph for Fedora
> to use, mainly due to my inexperience with native mulgara, so rebuilding
> fails, and Mulgara seems empty.
In datastore configuration for Mulgara in fedora.fcfg, set "remote" to
"true", and set the "host" (and "port" if you're not using the default
1099) parameter to the host Mulgara is running on (e.g. "localhost").
You also need to ensure that the serverName parameter matches your
remote instance of Mulgara (e.g. start mulgara with "-s fedora" or
change serverName in fedora.fcfg to "server1", which is Mulgara's
default). I think that's it ;) Let me know if that works for you. Then
this should go up on the wiki.
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