[OTDev] Experiments with RDF

Egon Willighagen egon.willighagen at gmail.com
Fri Oct 1 07:46:32 CEST 2010


Hi all,

On Fri, Oct 1, 2010 at 7:32 AM, Nina Jeliazkova
<jeliazkova.nina at gmail.com> wrote:
> Would it be possible to run further experiments - in particular:
>
> - Split the reported time into time, necessary to download the RDF
> representation from the server, and time, necessary to parse and load the
> RDF as Jena object.

I would also request, that when reporting performance results, please
report the tools that are used (name and version), as not every tool
is equally slow/fast.

> - Report time to parse RDF into different in-memory Jena models (ones from
> http://jena.sourceforge.net/javadoc/com/hp/hpl/jena/ontology/OntModelSpec.html(not
> sure which is being used in the  tests now)

Indeed. Jena has normal triple models, as well as ontology models...
turning of OWL reasoning/logic when not really needed may speed up
things indeed.

> - Report timings, using slightly different approach to convert to weka
> instances, namely , retrieve URIs of compounds first and then retrieve
> features for each compound in subsequent calls.
>
> - Report timings, when using Jena persistent storages , instead of in-memory
> one (http://openjena.org/TDB/, http://openjena.org/SDB/ )

And in case of SDB, if you use MySQL, PostgreSQL, HSQLDB, etc.

Egon

-- 
Dr E.L. Willighagen
Post-doc @ Uppsala University (only until 2010-09-30)
Proteochemometrics / Bioclipse Group of Prof. Jarl Wikberg
Homepage: http://egonw.github.com/
LinkedIn: http://se.linkedin.com/in/egonw
Blog: http://chem-bla-ics.blogspot.com/
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