Nicolas Figay wrote:
Hi Hugh (and Armin)
Thanks a lot for responding and for the useful links, in particular
the matrix that complements the FAQ.
My question was motivated by some difficulty using RDF views on
internal databases:
Let's give a precise exemple:
I tried to create a RDF view on the table thalia.demo.cmu, through
database<rdfview pan.
For column selection, I clicked on primary key selection.
Then a message , I had the following message:
External data sources:This Virtual Database feature is available only
in the commercial release of Virtuoso Universal Server. For more
information on the commercial release of the Virtuoso Universal
Server, click on the following links to learn more:
I then tried, after going back, the generation by clicking "generate"
button.
The message I had is the following: "This version do not support
tables without primary key, please remove table thalia.demo.cmu from set"
So I was (and I'm still) a little bit perplex, as it is not obvious to
me if RDF View creation on a database is a part of virtual database
functional component (which is not a part of open solution) or if
there is a limitation of open solution (that does not exist with
commercial version) when creating a RDF view on a table without a
primary key.
It was the reason why I was desespately looking for detailed and clear
differences between open and commercial version, having difficulties
to find required information to understand the origins of encountered
messages.
So more precisely, my questions should be about the encountered issues
and messages I had:
* is the fact that creation of a RDF view without primary key does
not work comes from usage of the open version?
No. You have an outdated VAD package re. Conductor (which hosts the RDF
Views Wizard).
* is creation of RDF view a fearure of Virtual Database?
Not exclusively, you can make RDF Views atop Virtuoso hosted RDBMS Data
(which also implies Web Services which can be attached and used as User
Defined Types).
* or is encountered problems come from the fact thalia database is
an exemple of external datasource?
No as per earlier comment, a bug in the VAD.
knowing that what I would like to do is to understand how a database
in virtuoso can be accessed through a RDF view, hopping it is a
feature of open version.
It is.
Virtuoso is an extremely capable OLTP or Decision Support RDBMS (this
part of Virtuoso is far more sophisticated and mature than the RDF
aspect, ironically).
Kingsley
Best regards.
Nicolas
2010/5/26 Hugh Williams <[email protected]
<mailto:[email protected]>>
Hi Nicolas,
The differences between the commercial and open source products
are listed in the following feature comparison matrix:
http://virtuoso.openlinksw.com/main/featurematrix/index.htm
In summary the following are commercial features only:
- Virtual Database Engine
- Replication
- Clustering and high availability
- Geo-Spatial Extensions
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 26 May 2010, at 11:40, Nicolas Figay wrote:
> Hi,
>
> investigating functional coverage of virtuoso (as I'm a teacher
in the are of semantic web and digital collaboration field), I've
some difficulties to clearly understand what the limitations are
for open source communitary virtuoso openlink, compared to
enterprise version.
>
> Some are appearing when trying to use the tool, for example
creation of RDF views on tables of a database, but it is difficult
to identify quicly what could be investigated for demonstration
and what we should forget relying only on community edition.
>
> Is there a place or a document where differences are listed, as
restrictions of community edition (version 6.x)?
>
> Thanks by advance.
>
> Nicolas
>
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