Re: Further testing...

From: Stefano Mazzocchi <>
Date: Thu, 19 Jan 2006 08:52:47 -0500

Rickard Öberg wrote:
> This is kind of off topic in a sense, but what the heck...
> Rickard Öberg wrote:
>> The test went well. I used Sesame 1.2.3 as repository and used XStream
>> to serialize our Java objects to XML and then used the object id's as
>> subjects, "urn:data" as predicate, and the stringified XML as object.
>> Worked like a charm, with equal or better performance than the
>> previous persistence store (which was a serialized binary database,
>> Jisp, works kind of like BerkeleyDB).
>> The next step for me is to index various XPath's in the serialized XML
>> as RDF properties of the object, and then all of a sudden we can do
>> some very very very cool queries on our entire object model, not to
>> mention handle versioning of object models trivially (by using
>> "urn:data:<version>" as predicate).
> I have now tried to import a database with the website of a reasonably
> large customer containing ~300.000 objects. It worked very well. I am
> happy with the size of the database (1Gb), and after having indexed some
> XML XPath's (hence making the RDF database contain ~3.000.000
> statements) we can now do some SerQL queries on the data that we have
> not been able to do before in a convenient way. I'm very very happy with
> the results so far.
> It looks like this is going to be very useful in a real-world
> application in a way that I have seen no other data management
> technology do before :-)

Nice to hear that!

Can you tell us the kind of queries that you are doing?

do you feel the need for inferencing and truth management?

Stefano Mazzocchi
Research Scientist                 Digital Libraries Research Group
Massachusetts Institute of Technology            location: E25-131C
77 Massachusetts Ave                   telephone: +1 (617) 253-1096
Cambridge, MA  02139-4307              email: stefanom at mit . edu
Received on Thu Jan 19 2006 - 13:52:22 EST

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