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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:
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Prateem Mandal
Aug 29
Translate Sparql to SQL without database connection
Hi, I want to use OnTop as a SQL generator without connecting to any database. Is this possible? If
unread,
Translate Sparql to SQL without database connection
Hi, I want to use OnTop as a SQL generator without connecting to any database. Is this possible? If
Aug 29
Ash
,
Benjamin Cogrel
2
Apr 29
security vulnerability
Hi Ash, Thanks for asking. - CVE-2016-1000027: this is a controversial "critical"
unread,
security vulnerability
Hi Ash, Thanks for asking. - CVE-2016-1000027: this is a controversial "critical"
Apr 29
Agnes Aboagye
, …
Shane Blake
4
Apr 7
Setting up Ontop SPARQL enpoint with docker-compose is not working
If you are using docker-compose, was the jdbc driver in the directory before the first time you ran
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Setting up Ontop SPARQL enpoint with docker-compose is not working
If you are using docker-compose, was the jdbc driver in the directory before the first time you ran
Apr 7
Alberto Forlenza
Mar 29
Integrate Ontop CLI in Python App
Hi guys. I am developing a python app for my degree project at university. I'd like to know if
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Integrate Ontop CLI in Python App
Hi guys. I am developing a python app for my degree project at university. I'd like to know if
Mar 29
Agnes Aboagye
,
Richard Brown
3
Mar 12
Ontop query and CLI endpoint not working
The error message you sent indicates ontop is unable to read the nutitionalData.properties file you
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Ontop query and CLI endpoint not working
The error message you sent indicates ontop is unable to read the nutitionalData.properties file you
Mar 12
Agnes Aboagye
,
Roman Kontchakov
6
Mar 5
ontop mapping errors
Dear Roman, It is working now. thank you so much Agnes On Wed, Mar 5, 2025 at 4:12 PM Roman
unread,
ontop mapping errors
Dear Roman, It is working now. thank you so much Agnes On Wed, Mar 5, 2025 at 4:12 PM Roman
Mar 5
Frank Nebel
,
Benjamin Cogrel
3
Feb 28
FK-Constraint Isses with Ontop and Dremio (using Lenses)
Hi Frank, This problem has likely been fixed by https://github.com/ontop/ontop/pull/759, shipped with
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FK-Constraint Isses with Ontop and Dremio (using Lenses)
Hi Frank, This problem has likely been fixed by https://github.com/ontop/ontop/pull/759, shipped with
Feb 28
Frank Nebel
,
Benjamin Cogrel
5
Feb 28
Using GeoSPARQL with Dremio
Hello Benjamin, thank you for pointing out this potential solution. As you said, it would be quite
unread,
Using GeoSPARQL with Dremio
Hello Benjamin, thank you for pointing out this potential solution. As you said, it would be quite
Feb 28
André T.
,
Michael Havey
2
Jan 17
Ontop deployment on AWS
When I was with AWS, Charles Ivie and I built a demo showing Ontop with Amazon Neptune. See https://
unread,
Ontop deployment on AWS
When I was with AWS, Charles Ivie and I built a demo showing Ontop with Amazon Neptune. See https://
Jan 17
Vijon Baraku
,
André T.
3
Jan 14
Am I doing this right? PhD student struggling with some implementation..
Hey thanks a lot Andre for pointing me to the right direction. I will try to fix my implementation
unread,
Am I doing this right? PhD student struggling with some implementation..
Hey thanks a lot Andre for pointing me to the right direction. I will try to fix my implementation
Jan 14
Tu Tran
,
Benjamin Cogrel
2
Jan 2
[Ontop] Request for Assistance with Parsing and Template Mapping
Hi Tu, Could you please tell us more about what you are trying to achieve? In particular, what do you
unread,
[Ontop] Request for Assistance with Parsing and Template Mapping
Hi Tu, Could you please tell us more about what you are trying to achieve? In particular, what do you
Jan 2
Lee Huy
, …
Benjamin Cogrel
11
12/13/24
[Avoid checking Relational Database]
Hi Lee, You can analyse the substitution of the post-processing node (a ConstructionNode) and find
unread,
[Avoid checking Relational Database]
Hi Lee, You can analyse the substitution of the post-processing node (a ConstructionNode) and find
12/13/24
André Teege
, …
Benjamin Cogrel
9
12/9/24
Ontop bootstrap doesn't use specified schema
Hi Einar, Thanks for the feedback. Indeed, if there are no already existing roles suitable for this
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Ontop bootstrap doesn't use specified schema
Hi Einar, Thanks for the feedback. Indeed, if there are no already existing roles suitable for this
12/9/24
Vijon Baraku
,
Benjamin Cogrel
2
11/11/24
Mapping Automation
Hi Vijon, Ontop offers one solution for bootstrapping the mapping: https://ontop-vkg.org/guide/cli.
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Mapping Automation
Hi Vijon, Ontop offers one solution for bootstrapping the mapping: https://ontop-vkg.org/guide/cli.
11/11/24
Benjamin Cogrel
8/19/24
[ANN] Ontop 5.2.0 is out
Dear Ontop community, We are pleased to announce the release of Ontop 5.2.0! Among all, it features
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[ANN] Ontop 5.2.0 is out
Dear Ontop community, We are pleased to announce the release of Ontop 5.2.0! Among all, it features
8/19/24
Dalmir da Silva
, …
Benjamin Cogrel
5
8/19/24
Multiple reasoning schemas
Hi Martynas, Indeed, we still need to add a page about the OBDA syntax to the documentation. Here is
unread,
Multiple reasoning schemas
Hi Martynas, Indeed, we still need to add a page about the OBDA syntax to the documentation. Here is
8/19/24
wa ree
7/24/24
แทงหวยออนไลน์ เว็บไหนดี แนะนำ 10 อันดับ เว็บแทงหวยออนไลน์ จ่ายจริง ไม่อั้น บาทละ 1000
หวยออนไลน์บาทละ1000 เว็บไหนดี 10 เว็บแทงหวยบาทละ1000 จ่ายจริง แทงหวยบาทละ1000 เชื่อถือได้ อันดับ1 3
unread,
แทงหวยออนไลน์ เว็บไหนดี แนะนำ 10 อันดับ เว็บแทงหวยออนไลน์ จ่ายจริง ไม่อั้น บาทละ 1000
หวยออนไลน์บาทละ1000 เว็บไหนดี 10 เว็บแทงหวยบาทละ1000 จ่ายจริง แทงหวยบาทละ1000 เชื่อถือได้ อันดับ1 3
7/24/24
Sajith Ranatunga
, …
LB
5
5/7/24
Non-Topological Functions of geoSPARQL on Ontop
Hi, yes, it does see the docs regarding compliance: https://ontop-vkg.org/guide/compliance.html#
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Non-Topological Functions of geoSPARQL on Ontop
Hi, yes, it does see the docs regarding compliance: https://ontop-vkg.org/guide/compliance.html#
5/7/24
Michał Pietrusiński
, …
Thomas Taylor
14
4/12/24
LEFT OUTER JOINs for OPTIONAL
Hi All, I seem to have an issue similar to this on Ontop 5.2.0-SNAPSHOT (pulled 3/14/2024). I have a
unread,
LEFT OUTER JOINs for OPTIONAL
Hi All, I seem to have an issue similar to this on Ontop 5.2.0-SNAPSHOT (pulled 3/14/2024). I have a
4/12/24
André Teege
, …
Benjamin Cogrel
8
4/12/24
How to make Ontop listen on a different port than 8080 inside Docker
Thanks guys, you're right, I don't need different ports (which seems so obvious now). I
unread,
How to make Ontop listen on a different port than 8080 inside Docker
Thanks guys, you're right, I don't need different ports (which seems so obvious now). I
4/12/24
johan...@gmail.com
,
Benjamin Cogrel
5
3/14/24
RDF4JException not found - Ontop 5.1.2
My ontology is in RDF/XML. See attach. Op donderdag 14 maart 2024 om 09:22:45 UTC+1 schreef benjami..
unread,
RDF4JException not found - Ontop 5.1.2
My ontology is in RDF/XML. See attach. Op donderdag 14 maart 2024 om 09:22:45 UTC+1 schreef benjami..
3/14/24
Sajith Ranatunga
,
LB
3
3/14/24
Integrating SPARQL endpoint to a website
Thank you Lorenz, I'll check the Ontop CLI, I'm new to this Ontop and whole ontology and web
unread,
Integrating SPARQL endpoint to a website
Thank you Lorenz, I'll check the Ontop CLI, I'm new to this Ontop and whole ontology and web
3/14/24
johan...@gmail.com
,
Guohui Xiao
2
3/9/24
Map a REST endpoint
Hi Johan, You can use a system, like Denodo, to wrap your REST endpoint into a relational database,
unread,
Map a REST endpoint
Hi Johan, You can use a system, like Denodo, to wrap your REST endpoint into a relational database,
3/9/24
Stefan Bischof
,
LB
2
2/22/24
Quoted Identifiers in TDengine
Hi, I think in the Ontop properties file can can change parts of the used components for the creation
unread,
Quoted Identifiers in TDengine
Hi, I think in the Ontop properties file can can change parts of the used components for the creation
2/22/24
Batoul Haydar
2/5/24
SPARQL query doesnt return any results
I have created a mapping where when the SQL is executed I get the attribute target. It is not
unread,
SPARQL query doesnt return any results
I have created a mapping where when the SQL is executed I get the attribute target. It is not
2/5/24
Alberto Soki
,
Benjamin Cogrel
3
1/23/24
Proper Citation for Ontop VKG Link in Academic Article
Benjamin, thank you for your feedback. Em terça-feira, 23 de janeiro de 2024 às 09:12:39 UTC-3,
unread,
Proper Citation for Ontop VKG Link in Academic Article
Benjamin, thank you for your feedback. Em terça-feira, 23 de janeiro de 2024 às 09:12:39 UTC-3,
1/23/24
Thomas Taylor
,
Benjamin Cogrel
2
1/12/24
MySQLDBFunctionSymbolFactory - XSD Cast Functions - Issues
Hi Thomas, Thanks for reporting the issue, Albulen is having a look. Here is his draft PR: https://
unread,
MySQLDBFunctionSymbolFactory - XSD Cast Functions - Issues
Hi Thomas, Thanks for reporting the issue, Albulen is having a look. Here is his draft PR: https://
1/12/24
Ron Basumallik
,
Benjamin Cogrel
3
1/5/24
DuckDB data not updating
Hi Ron, Thank you for sharing your experience with Ontop and DuckDB. There is no data caching in
unread,
DuckDB data not updating
Hi Ron, Thank you for sharing your experience with Ontop and DuckDB. There is no data caching in
1/5/24
Monica Rocha
,
Benjamin Cogrel
2
1/5/24
Using composite primary key
Hi Monica, Sorry for the very late reply. You can a composite IRI template as follows: :myTemplate/{
unread,
Using composite primary key
Hi Monica, Sorry for the very late reply. You can a composite IRI template as follows: :myTemplate/{
1/5/24
pasquale...@gmail.com
, …
Benjamin Cogrel
4
1/5/24
ontop and duckdb
Hi Pasquale, Sorry for the very late reply. I tried to reproduce your issue with Ontop 5.1.1 and
unread,
ontop and duckdb
Hi Pasquale, Sorry for the very late reply. I tried to reproduce your issue with Ontop 5.1.1 and
1/5/24