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Posted to dev@jena.apache.org by "Tobias Trapp (Created) (JIRA)" <ji...@apache.org> on 2012/03/10 23:46:57 UTC
[jira] [Created] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
------------------------------------------------------------------------------------------------------------
Key: JENA-220
URL: https://issues.apache.org/jira/browse/JENA-220
Project: Apache Jena
Issue Type: Improvement
Components: Fuseki
Affects Versions: Fuseki 0.2.1
Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
Reporter: Tobias Trapp
Fix For: Fuseki 0.2.1
When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Tobias Trapp (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227025#comment-13227025 ]
Tobias Trapp commented on JENA-220:
-----------------------------------
Thanks for your answer. Unfortunately this is not a solution: Of course JVM and so Fuseki can deal with proxies but the problem is that the W3C distiller gets the URL of the page to be distilled and calls back and exactly this call is blocked by the firewall.
So they are only two choices: the distiller should be part of Fuseki ( perhaps using http://www.jython.org/ ) or use in a way that there's no callback.
At the moment the general purpose SPARQL query on RDFa is not usable from behind a firewall and since RDFa get's more important I consider that as a major improvement.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Andy Seaborne (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227392#comment-13227392 ]
Andy Seaborne commented on JENA-220:
------------------------------------
If rdfadev is using sparql.org as a SPARQL service, then great but sparql.org is not guaranteed to be available.
Fuseki itself has *no* built-in URLs. It does not have any mention of the W3C service.
So that has to come from outside, in a request, whether that is SPARQL FROM (encoded into the URl making the query request) or a parameter (query string) to the request.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Updated] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Andy Seaborne (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Seaborne updated JENA-220:
-------------------------------
Priority: Minor (was: Major)
Labels: (was: patch)
Rerated - this is not "major".
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Andy Seaborne (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227082#comment-13227082 ]
Andy Seaborne commented on JENA-220:
------------------------------------
The title of this JIRA is confusing: Fuseki does not use the W3C distiller unless you have in some way made a call to it in a SPARQl query or a custom web page.
So you want a external service (W3C's distiller service) to call back through the firewall to some local pages? Where are those HTML/RDFa pages? Fuseki is a SPARQL server (query, update, store protocol).
How are you invoking the distiller? is through a FROM clause in SPARQL?
A service-oriented approach would be to run your own copy of the service inside the firewall (it's open source a W3C software license and a BSD license - you can download and use it for any purpose).
It is possible to include any extra JVM code in Fuseki as the config file allows arbitrary code to be loaded. But if you are going down this route, then maybe using a RDFa reader (like https://github.com/shellac/java-rdfa) is easier.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Closed] (JENA-220) General purpose SPARQL query engine uses
W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Tobias Trapp (Closed) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tobias Trapp closed JENA-220.
-----------------------------
Resolution: Fixed
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Paolo Castagna (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227415#comment-13227415 ]
Paolo Castagna commented on JENA-220:
-------------------------------------
What I would probably do and what makes more sense to me is to aggregate RDF data crawling the relevant/needed HTML pages using tools available such as Any23, java-rdfa, etc.
The RDF data crawled that way can be added to a TDB store and that used to provide a SPARQL endpoint with Fuseki.
This way, you do not depend on external services (which might not be available) and you have full control on the RDF data you need and you want to publish.
The notion of querying an HTML page with RDFa in it using SPARQL seems to me not quite useful, since often the amount of data available in a single page is limited and many use cases requires queries to span across pages anyway.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Andy Seaborne (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226953#comment-13226953 ]
Andy Seaborne commented on JENA-220:
------------------------------------
Fuseki does not ship with or provide RDFa distilling itself. How are you invoking this functionality? Is it by e.g. SPARQL FROM clause? If so, that's where the distiller needs to be set.
If you are behind a firewall, and want Java to call out through it, try setting the proxy details when you invoke java:
http://stackoverflow.com/questions/120797/how-do-i-set-the-proxy-to-be-used-by-the-jvm
The W3C service is pyRdf.
http://www.w3.org/2007/08/pyRdfa/#distribution
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Tobias Trapp (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227835#comment-13227835 ]
Tobias Trapp commented on JENA-220:
-----------------------------------
@Andy You are right - I'm closing the improvement. There is no built in URL in Fuseki - I checked it using HTTP sniffer as well as Fuseki log. Sorry and thanks for all for advice.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Tobias Trapp (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227255#comment-13227255 ]
Tobias Trapp commented on JENA-220:
-----------------------------------
Im using Fuseki as general SPARQL service for HTML services with embedded RDFa markup from behind a firewall. There are tools like RDFa developer (see http://rdfadev.sourceforge.net/ ) that allow general SPARQL queries. This program calls http://sparql.org/sparql which is a Fuseki server. I want to call my own Fuseki server but this server uses implicitely the W3C RDFa distiller in a callback mode.
Please let me summarize: Fuseki is called as generic purpose SPARQL query: http://localhost:3030/sparql for embedded RDFa. It is not a FROM clause but a URL given to that service. Of couse I could code everything by myself but I think an own distiller would be an major improvement for Fuseki: You can work with Fuseki as general purpose SPARQL query and you don't have to take care about (corporate) firewalls.
Without that improvement I have to go down the road you described. I service oriented approach would be quite intriguing: Is there a way so that I can redirect service calls to my own services? IMHO we don't need complex standards like UDDI - it would suffice that we could control URLs of services to be called by Fuseki. Can you tell me how to do?
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Issue Comment Edited] (JENA-220) General purpose SPARQL
query engine uses W3C is uses online RDFa Distiller - so not usable behind
a firewall
Posted by "Paolo Castagna (Issue Comment Edited) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227415#comment-13227415 ]
Paolo Castagna edited comment on JENA-220 at 3/12/12 10:37 AM:
---------------------------------------------------------------
What I would probably do and what makes more sense to me is to aggregate RDF data crawling the relevant/needed HTML pages using tools available such as Any23, java-rdfa, etc.
The RDF data crawled that way can be added to a TDB store and that used to provide a SPARQL endpoint with Fuseki.
This way, you do not depend on external services (which might not be available) and you have full control on the RDF data you need and you want to publish.
The notion of querying an HTML page with RDFa in it using SPARQL seems to me not much useful, since often the amount of data available in a single page is limited and many use cases requires queries to span across pages anyway.
was (Author: castagna):
What I would probably do and what makes more sense to me is to aggregate RDF data crawling the relevant/needed HTML pages using tools available such as Any23, java-rdfa, etc.
The RDF data crawled that way can be added to a TDB store and that used to provide a SPARQL endpoint with Fuseki.
This way, you do not depend on external services (which might not be available) and you have full control on the RDF data you need and you want to publish.
The notion of querying an HTML page with RDFa in it using SPARQL seems to me not quite useful, since often the amount of data available in a single page is limited and many use cases requires queries to span across pages anyway.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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[jira] [Commented] (JENA-220) General purpose SPARQL query engine
uses W3C is uses online RDFa Distiller - so not usable behind a firewall
Posted by "Paolo Castagna (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/JENA-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13227348#comment-13227348 ]
Paolo Castagna commented on JENA-220:
-------------------------------------
I have been following this discussion with interest, since I am interested in RDFa and support use cases involving RDFa in Apache Jena.
However, I must say I am confused, even your last message, Tobias, confused me more and more instead of clarify.
Maybe it is because I do not know well enough the tools you mention. Maybe a concrete and simple example could help me understand better the situation.
> General purpose SPARQL query engine uses W3C is uses online RDFa Distiller - so not usable behind a firewall
> ------------------------------------------------------------------------------------------------------------
>
> Key: JENA-220
> URL: https://issues.apache.org/jira/browse/JENA-220
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.1
> Environment: I runnung Fuseki version 0.2.1-incubating-SNAPSHOT (Build date: 2012-03-03T05:07:05+0000) under Windows 7 Professional: java -jar fuseki-server.jar --mem /dataset
> Reporter: Tobias Trapp
> Priority: Minor
> Fix For: Fuseki 0.2.1
>
>
> When I'm using http://localhost:3030/sparql in Fuseki - I get an wrong results when working behind a firewall. The reason is simple: RDFa is distilled using the W3C service http://www.w3.org/2007/08/pyRdfa/ which you can see in the console or when HTTP sniffing. So the sofwtare is not usable in an intranet solution or behind firewalls. Is it possible to use another distiller, perhaps http://dev.w3.org/2004/PythonLib-IH/dist/pyRdfa.tar.gz using Jython?
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