Hi Arthi,
The Stanbol Contenthub component is an Apache Solr based document
repository, it is not a triple store. It should be use to store
documents with textual content along with RDF metadata. You can find
proper documentation about its usage in [1]. Basically, by default, if
you submit a file(document) to the ContentHub, it will try to enhance it
using the enhancement chain passed by parameter (default chain if the
parameter value is missing), extract the entities and store them along
with the original content in a semantic index in Solr. Besides this, the
resultant enhancement structure (enhancement graph) is stored in a graph
registered in the system (org.apache.stanbol.contenthub.enhancements).
You can then query this graph using the SPARQL endpoint provided by
Stanbol.
I'm not completely sure about it, but I think that If you directly
upload a RDF/XML file to the ContentHub, it is going to try to enhance
it (as normal text) because currently the only format supported for the
content is text/plain. If you need to put together the enhancement
results and some custom metadata in RDF, you can use the metadata
parameter of the REST services of the ContentHub. Take a look to the
REST API at [2]. If you are using Java for your integration, you can see
some examples about how to upload content and enhancements + custom
metadata to the ContentHub in [3].
Hope this helps. Regards
[1] -
http://stanbol.apache.org/docs/trunk/components/contenthub/contenthub5min
[2] - http://dev.iks-project.eu:8081/contenthub/contenthub/store
[3] - https://github.com/zaizi/apache-stanbol-client
El 17/07/13 15:36, arthi.ven...@wipro.com escribió:
Hi,
I have a requirement to query the enhancement as done by Stanbol enhancer
along with another RDF data ( data store supports SPARQL endpoint)
I ran the custom enhancer chain from the curl command. I piped the RDF/XML
output to a local file.
I than uploaded this to the content hub.
When I ran the default SPARQL query from the SPARQL web page I got no results.
I assumed that once I upload an RDF file into content hub then the query will
run on this.
Is this understanding correct?
What am I doing wrong here?
If I now need to query across both the data ( the RDF file as well as the other
RDF endpoint )
In the ContentHub if I paste the other RDF URL in the Submit a public resource
by URL will the query now happen across both these data.
is there any simple code from which I can run the above case.
Sorry for the newbee question. I have read multiple documents but could not
find a resolution.
Thanks for your help and regards,
Arthi
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