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ontop4obda
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Welcome
Welcome to the group of the
Ontop
Virtual Knowledge Graph system.
To get more information about Ontop, visit the official website at:
https://ontop-vkg.org
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Malik Luti
,
tir
2
Mar 20
How to query for ontology resources
To query the ontology through SPARQL, you need to set ontop.queryOntologyAnnotation=true and ontop.
unread,
How to query for ontology resources
To query the ontology through SPARQL, you need to set ontop.queryOntologyAnnotation=true and ontop.
Mar 20
Alberto Soki
Mar 20
Can you help me with this?
Hey guys. Ontop is a Virtual Knowledge Graph system. It exposes the content of arbitrary relational
unread,
Can you help me with this?
Hey guys. Ontop is a Virtual Knowledge Graph system. It exposes the content of arbitrary relational
Mar 20
Alberto Soki
, …
Martynas Jusevičius
10
Mar 20
ontop tutorial
Yes Mart, i ended up adding the property and it worked, thanks. Em quinta-feira, 16 de março de 2023
unread,
ontop tutorial
Yes Mart, i ended up adding the property and it worked, thanks. Em quinta-feira, 16 de março de 2023
Mar 20
Alberto Soki
,
Benjamin Cogrel
5
Mar 17
Setting up an Ontop SPARQL endpoint with Ontop CLI
Thanks Benjamin, I removed the input/ and it worked. Em qui., 9 de mar. de 2023 às 16:10, Benjamin
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Setting up an Ontop SPARQL endpoint with Ontop CLI
Thanks Benjamin, I removed the input/ and it worked. Em qui., 9 de mar. de 2023 às 16:10, Benjamin
Mar 17
Benjamin Cogrel
Mar 9
[ANN] Ontop 5.0.2 is out
Dear Ontop community, We are glad to announce that Ontop 5.0.2 is out! This special "minor"
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[ANN] Ontop 5.0.2 is out
Dear Ontop community, We are glad to announce that Ontop 5.0.2 is out! This special "minor"
Mar 9
Thomas Taylor
,
Benjamin Cogrel
2
Feb 12
OntopSQLOWLAPIConfiguration Removal of OWLOntology in Ontop 5.0
Hi Thomas, Thanks for pointing this out. Indeed in Ontop 5.0 we removed this method as part of our
unread,
OntopSQLOWLAPIConfiguration Removal of OWLOntology in Ontop 5.0
Hi Thomas, Thanks for pointing this out. Indeed in Ontop 5.0 we removed this method as part of our
Feb 12
Greg Soulsby
,
Guohui Xiao
6
Feb 8
How to install the Protege plugin?
Yes, thanks Guohui, from now on its bundles only for me. Many thanks, On Wednesday, 8 February 2023
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How to install the Protege plugin?
Yes, thanks Guohui, from now on its bundles only for me. Many thanks, On Wednesday, 8 February 2023
Feb 8
Greg Soulsby
,
Guohui Xiao
2
Feb 8
oClassDefFoundError on "Bootstrapping ontology and mappings"
Hi Greg, Can you confirm that you are running **Protege in a Docker container**? This is not scenario
unread,
oClassDefFoundError on "Bootstrapping ontology and mappings"
Hi Greg, Can you confirm that you are running **Protege in a Docker container**? This is not scenario
Feb 8
Johan Van Noten
, …
Francesco Corcoglioniti
6
Feb 7
Ontop 5.0.2 failure to connect to Databricks
Hi Johan, apologies for the issue with the missing java modules (my mistake)! Regarding the error
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Ontop 5.0.2 failure to connect to Databricks
Hi Johan, apologies for the issue with the missing java modules (my mistake)! Regarding the error
Feb 7
Johan Van Noten
,
Benjamin Cogrel
2
Feb 7
Databricks & distinct & order by
Hi Johan, Is the ORDER BY condition projected by your SPARQL query? What is the error message? The
unread,
Databricks & distinct & order by
Hi Johan, Is the ORDER BY condition projected by your SPARQL query? What is the error message? The
Feb 7
Benjamin Cogrel
, …
Alfredo Serafini
4
Feb 1
[ANN] Ontop 5.0.0 is out
Oh sorry! I was indeed searching how to reproduce the cli commands (in particular: ontop materialize
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[ANN] Ontop 5.0.0 is out
Oh sorry! I was indeed searching how to reproduce the cli commands (in particular: ontop materialize
Feb 1
Adrian Gschwend
,
Benjamin Cogrel
4
Jan 7
Connecting to MS Access DBs using the "uCanAccess" JDBC driver
Hi Adrian, Sorry I forgot to mention that I had to include its dependency jars (shipped in the ZIP
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Connecting to MS Access DBs using the "uCanAccess" JDBC driver
Hi Adrian, Sorry I forgot to mention that I had to include its dependency jars (shipped in the ZIP
Jan 7
Johan Van Noten
, …
Benjamin Cogrel
8
12/9/22
OBDA mapping with SPARQL source
Hi all, This feature has been implemented and will be soon released with Ontop 5.0.0: https://github.
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OBDA mapping with SPARQL source
Hi all, This feature has been implemented and will be soon released with Ontop 5.0.0: https://github.
12/9/22
David Großmann
,
conpco...@googlemail.com
3
11/18/22
Using SUBSTR generates error
Thanks, yes of course like I did with count. Sometimes it's to easy. Have a nice day! conpco...@
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Using SUBSTR generates error
Thanks, yes of course like I did with count. Sometimes it's to easy. Have a nice day! conpco...@
11/18/22
Vasil Vasilev
,
Benjamin Cogrel
2
11/17/22
Replace effects only the first match when using postgres
Hi Vasil, Thanks for reporting the issue. That is indeed a bug. I just opened an issue to track it:
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Replace effects only the first match when using postgres
Hi Vasil, Thanks for reporting the issue. That is indeed a bug. I just opened an issue to track it:
11/17/22
Michael Havey
,
Benjamin Cogrel
2
11/14/22
Ontop - no username, password
Hi Michael, Yes, they are optional, it should work. Best, Benjamin On Wed, Nov 9, 2022 at 8:38 PM
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Ontop - no username, password
Hi Michael, Yes, they are optional, it should work. Best, Benjamin On Wed, Nov 9, 2022 at 8:38 PM
11/14/22
Johan Van Noten
, …
Benjamin Cogrel
4
11/6/22
Lenses for making a graph out of a flat table?
Hi Johan, Thanks for the precision! I think it can be made simpler. Instead of creating some concat
unread,
Lenses for making a graph out of a flat table?
Hi Johan, Thanks for the precision! I think it can be made simpler. Instead of creating some concat
11/6/22
Marco Antonio Stranisci
,
Guohui Xiao
3
10/18/22
how to do not merge results
it works perfectly, thanks a lot! Il giorno mar 18 ott 2022 alle ore 14:22 Guohui Xiao <gh.xiao@
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how to do not merge results
it works perfectly, thanks a lot! Il giorno mar 18 ott 2022 alle ore 14:22 Guohui Xiao <gh.xiao@
10/18/22
Alexey Dr. Fishkin
10/17/22
teiid with MongoDB
hi, I am trying to use ontop over teiid with MongoDB. So, I am ending with quite a strange error
unread,
teiid with MongoDB
hi, I am trying to use ontop over teiid with MongoDB. So, I am ending with quite a strange error
10/17/22
Johan Van Noten
,
Benjamin Cogrel
4
9/23/22
Ontop-cli failure on Windows
Hi Benjamin, Thanks for your suggestion. The newest version that I found is version 22.1.1, but
unread,
Ontop-cli failure on Windows
Hi Benjamin, Thanks for your suggestion. The newest version that I found is version 22.1.1, but
9/23/22
Malik Luti
, …
tir
4
9/12/22
NoSql-DataBases Not Supported in Ontop
Hi, you might start with the tutorials. https://ontop-vkg.org/tutorial/federation/ Best, Davide. On
unread,
NoSql-DataBases Not Supported in Ontop
Hi, you might start with the tutorials. https://ontop-vkg.org/tutorial/federation/ Best, Davide. On
9/12/22
Johan Van Noten
,
Benjamin Cogrel
4
9/9/22
Wrong SQL query generated?
Hi Johan, Good to hear it wasn't a blocking point. Thank you for proposing to reproduce the issue
unread,
Wrong SQL query generated?
Hi Johan, Good to hear it wasn't a blocking point. Thank you for proposing to reproduce the issue
9/9/22
Michael Havey
,
Benjamin Cogrel
2
9/1/22
Increase timeout
Hi Michael, Yes, ontop.query.defaultTimeout is the key to use. It is measured in seconds (I just
unread,
Increase timeout
Hi Michael, Yes, ontop.query.defaultTimeout is the key to use. It is measured in seconds (I just
9/1/22
Michael Havey
,
Peter Hopfgartner
2
8/25/22
SPARQL string match results in SQL that gives error.
Dear Micheal, there is no specific adapter to AWS Athena at the moment, even if this might be a very
unread,
SPARQL string match results in SQL that gives error.
Dear Micheal, there is no specific adapter to AWS Athena at the moment, even if this might be a very
8/25/22
Rashif Rahman
,
Benjamin Cogrel
3
8/16/22
Status of support for NOT EXISTS
Understood, thanks for the confirmation and clarification! On Tuesday, 16 August 2022 at 17:36:59 UTC
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Status of support for NOT EXISTS
Understood, thanks for the confirmation and clarification! On Tuesday, 16 August 2022 at 17:36:59 UTC
8/16/22
Rashif Rahman
,
Benjamin Cogrel
8
8/4/22
Aggregate query with subquery failing on ONTOP endpoint
Awesome, thanks a lot for all your support! This really helped us get the progress we needed. We'
unread,
Aggregate query with subquery failing on ONTOP endpoint
Awesome, thanks a lot for all your support! This really helped us get the progress we needed. We'
8/4/22
David Großmann
,
davide lanti
5
7/6/22
Ontop ist adding useless unions when adding another column in my SPARQL
Hi David, the reason why Ontop produces so many unions is because :meddok_CODE_GES is defined in *
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Ontop ist adding useless unions when adding another column in my SPARQL
Hi David, the reason why Ontop produces so many unions is because :meddok_CODE_GES is defined in *
7/6/22
Marco Antonio Stranisci
,
Benjamin Cogrel
2
6/22/22
memory issue with large DB
Hi Marco, Which database system are you using? And which version of Ontop? I suspect that the
unread,
memory issue with large DB
Hi Marco, Which database system are you using? And which version of Ontop? I suspect that the
6/22/22
Guohui Xiao
6/20/22
Re: How to mapping correctly?
Hi, I noticed that there are several messages from you to the group but classified as spam. I only
unread,
Re: How to mapping correctly?
Hi, I noticed that there are several messages from you to the group but classified as spam. I only
6/20/22
Roman Shvetsov
,
Guohui Xiao
2
6/10/22
Get sparql query results as ontology
Hi Roman, I am not sure if the following very relevant issue is created by you. https://github.com/
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Get sparql query results as ontology
Hi Roman, I am not sure if the following very relevant issue is created by you. https://github.com/
6/10/22