I do NOT want to map relational data to RDF!
I simply want to use Virtuoso opensource as _a relational DB_! But all
the tutorials and instruction pages have only information of handling
RDF data. I believe Virtuoso is a native relational DB and support for
RDF is added "on top of it", am I right? So I want to use the native
relational DB.
E.g. I want to load a relational table with say 5 columns A, B, C, D,
E in Virtuoso and run SQL queries on that data directly by creating
indexes etc.
No RDF conversion required!
--------------------------------------------
I have a couple more questions/problems. My next question is unrelated
this the previous one.
1. If I want to load RDF data into Virtuoso opensource, are strings
and URIs in the RDF database mapped first to hash or integer (or some
IDs), and stored in that form? If yes, then if I run a SPARQL query,
say "select ?s ?o where {?s ?p ?o}", can I get values of ?s and ?o in
the hash or integer ID forms instead of string or URI forms? (This is
for the sake of measuring the "raw" query evaluation speed of
Virtuoso, where I do not want to account for the "ID --> String"
conversion time.
2. I tried to compile and setup Virtuoso-opensource 7.1 on Ubuntu
12.04 LTS. I ran "autogen.sh", and "./configure
--prefix=/work/tools/virtinstall
--program-transform-name="s/isql/isql-v", and then "make", and "make
install", but even after all the steps completing successfully, I have
an EMPTY "bin" directory under "/work/tools/virtinstall" (the "prefix"
install path given to the configure script).
Why is this happening? The "autogen", "configure", and "make" do not
show any errors, and all the required dependencies as mentioned on
http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSMake#Package%20Dependencies
are installed on my machine!
Could you please let me know answers of these questions?
Thanks.
Medha
On Mon, Aug 4, 2014 at 5:46 PM, Hugh Williams <hwilli...@openlinksw.com> wrote:
> Hi Medha,
>
> Virtuoso open source does not have the necessary Virtual Database (VDB)
> support for mapping relational databases (transiently or persistently) to
> RDF using Virtuoso Linked Data Views [1][2] , as this is a commercial only
> feature [3]. The commercial product is for evaluation download from [4].
>
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc. // http://www.openlinksw.com/
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> Universal Data Access, Integration, and Management Technology Providers
>
> [1] http://docs.openlinksw.com/virtuoso/rdfviewsrdbms.html
> [2] http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSSQL2RDF
> [3] http://virtuoso.openlinksw.com/features-comparison-matrix/
> [4] http://virtuoso.openlinksw.com/download
>
> On 4 Aug 2014, at 12:20, Medha Atre <medha.a...@gmail.com> wrote:
>
> Hi,
>
> I want to use the opensource edition of Virtuoso to load relational
> data into it, create indexes, and run SQL queries on it.
> Can someone point me to a tutorial or instructions for it? I mostly
> came across instructions for RDF data loading.
>
> Thanks in anticipation.
>
> Medha
>
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