Hi Yu,
Have you looked the Virtuoso Conductor UI for automatic generation of RDF VIews
and Linked Data deployment rules as detailed at:
http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VOSSQL2RDF#Automated%20Generation%20of%20RDF%20Views%20over%20Relational%20Data%20Sources
This should simplify the process for you ...
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
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On 6 Feb 2011, at 00:38, l Yu wrote:
> Hi,
>
> I have been trying working with Virtuoso server for a little while, really
> like its powerful support to the Web of Linked Data (or the Semantic Web).
> However, the documentation is not easy to follow sometimes.
>
> Anyway, I am trying the deployment part of the Linked Data, and my URL
> re-writing rule just refuses to work. I have been trying this for days, don't
> understand what is wrong.
>
> Here is my simple rule:
>
> DB.DBA.VHOST_REMOVE(lpath=>'/oplweb');
>
> DB.DBA.VHOST_DEFINE(lpath=>'/oplweb', ppath=>'/', vsp_user=>'dba',is_dav=>0,
> opts=>vector('url_rewrite', 'product_rule_list') );
>
> DB.DBA.URLREWRITE_CREATE_RULELIST('product_rule_list', 1,
> vector('product_rule1'));
>
> DB.DBA.URLREWRITE_CREATE_REGEX_RULE('product_rule1', 1, '(/[^#]*)', vector
> ('path'), 0,
> '/sparql?query=define%20input%3Astorage%20%3Chttp%3A%2F%2Flocalhost%3A8890%2Frdfv_demo%2Fquad_storage%2Fdefault%3E%0D%0Aselect%20%2A%20%0D%0Afrom%20%3Chttp%3A%2F%2Flocalhost%3A8890%2Foplweb%2Fproduct%3E%0D%0Awhere%20%7B%3Chttp%3A%2F%2Flocalhost%3A8890$U1%3E%20%3Fx%20%3Fy%20%7D&format=$accept',
> vector('path','*accept*'), NULL, '(text/rdf.n3)|(application/rdf.xml)', 0,
> NULL, NULL );
>
>
>
> The long ugly part in the above rule represents this query:
>
> define input:storage <http://localhost:8890/rdfv_demo/quad_storage/default>
> select *
> from <http://localhost:8890/oplweb/product>
> where {<http://localhost:8890$U1> ?x ?y }
>
> When my RDF view is generated, it has a graph name called
> <http://localhost:8890/oplweb/product>, and the URI of one of the instances
> is something like this:
> http://localhost:8890/rdfv_demo/testdata/products/odbc-informix-ee.
>
> When I try to de-reference this URL,
>
> http://localhost:8890/rdfv_demo/testdata/products/odbc-informix-ee
>
> It just does not work. Also, the following test fails as well:
>
> curl -I -H "Accept: application/rdf+xml"
> http://localhost:8890/rdfv_demo/testdata/products/odbc-informix-ee
>
> Any help will be greatly appreciated!!
>
> Thanks,
> Yu
> ------------------------------------------------------------------------------
> The modern datacenter depends on network connectivity to access resources
> and provide services. The best practices for maximizing a physical server's
> connectivity to a physical network are well understood - see how these
> rules translate into the virtual world?
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