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https://issues.apache.org/jira/browse/CLEREZZA-908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Enrico Daga updated CLEREZZA-908:
---------------------------------

    Description: 
This problem raised some time ago for the first time but it needs some time to 
be clarified. Discussions has been done in the virtuoso mailing list [1].

Specifically, inserting a triple with a value of type rdf:XMLLiteral caused a 
string "0" to be inserted. At that time a partial solution was to serialize the 
whole triple as TTL and use a stored procedure db.dba.ttl(...) to save the 
triple. This worked, but caused the triple to loose the datatype (see [2]).

This is also what is currently implemented.

Anyway, this solution is bad for other reasons, especially:
- performance is too bad (serializes any triple...)
- you still don't have the correct datatype (there are two tests with "Ignore" 
annotation in VirtuosoMGraphTest that witness this)

[1] http://sourceforge.net/p/virtuoso/mailman/message/31987368/
[2] http://sourceforge.net/p/virtuoso/mailman/message/31992357/

  was:
This problem raised some time ago for the first time but it needs some time to 
be clarified. Discussions has been done in the virtuoso mailing list [1].

Specifically, inserting a triple with a value of type rdf:XMLLiteral caused a 
string "0" to be inserted. At that time a partial solution was to serialize the 
whole triple as TTL and use a stored procedure db.dba.ttl(...) to save the 
triple. This worked, but caused the triple to loose the datatype (see [2]).

This is also what is currently implemented.

Anyway, this solution is bad for other reasons, especially:
- performance is too bad (serializes any triple...)
- you still don't have the correct datatype

[1] http://sourceforge.net/p/virtuoso/mailman/message/31987368/
[2] http://sourceforge.net/p/virtuoso/mailman/message/31992357/


> Cannot save XMLDatatype on literals in virtuoso
> -----------------------------------------------
>
>                 Key: CLEREZZA-908
>                 URL: https://issues.apache.org/jira/browse/CLEREZZA-908
>             Project: Clerezza
>          Issue Type: Bug
>            Reporter: Enrico Daga
>            Assignee: Enrico Daga
>
> This problem raised some time ago for the first time but it needs some time 
> to be clarified. Discussions has been done in the virtuoso mailing list [1].
> Specifically, inserting a triple with a value of type rdf:XMLLiteral caused a 
> string "0" to be inserted. At that time a partial solution was to serialize 
> the whole triple as TTL and use a stored procedure db.dba.ttl(...) to save 
> the triple. This worked, but caused the triple to loose the datatype (see 
> [2]).
> This is also what is currently implemented.
> Anyway, this solution is bad for other reasons, especially:
> - performance is too bad (serializes any triple...)
> - you still don't have the correct datatype (there are two tests with 
> "Ignore" annotation in VirtuosoMGraphTest that witness this)
> [1] http://sourceforge.net/p/virtuoso/mailman/message/31987368/
> [2] http://sourceforge.net/p/virtuoso/mailman/message/31992357/



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