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Mark Kram

Posted in Ask·
Avatar of Mark KramMark Kram
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Automated Tools to Validate Named Graphs Against Ontologies

Hello! I have a named graph that was created through various ETL processes and mapping files with YARRRML. Basically, I want to check if the mapping against my ontology was done correctly. Is there a tool/framework that allows me to define unit tests or to evaulate the named graph based on my ontology? In essence, how can I check if the named graph is correct in an automated way?

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Commented on Tips for Viewing Object Properties per Class in Pr...·Posted inAsk The Ontologists
Avatar of Mark Kram
Mark Kram
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Hi Robert thanks for the fast reply. I tried using the usage tab but I am not happy with it as it does not show me the other entity. Maybe I am using it wrong. It just shows me the object property and if the selected class is in range or domain, but not the other class in domain/range. I also tried the view "object properties in domain of selected class", however it doesn't seem to work as it does not show anything.

Posted in Ask The Ontologists·
Avatar of Mark KramMark Kram
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Tips for Viewing Object Properties per Class in Protégé

Hello together, I am reviewing an Ontology in Protégé. However, I am finding it difficult to overview the object properties per class. I would like to focus a class and see the connected classes with theri respective object properties. Do you have any tipps for me to make my work a little bit easier?

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Commented on Seeking Guidance on Triples Extraction with Langua...·Posted inAsk
Avatar of Mark Kram
Mark Kram
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Hi Panos! I am comparing two approaches with LLMs. I have some domain specific text documents and defined entities and relations that I want to have extracted. For the first approach, I finetune a pretrained model for triple extraction, however as data is highly unbalanced the accuracy for some triples is just not good. For the second approach, I use an Open Information Extraction (OIE) model which is not finetuned on my relations. Instead, it outputs any kind of triples out of a text. This approach recognizes all possible relations but does not apply "relation-linking". My question is, is there a way to map the relations from the OIE model to my defined relations. Maybe with ambeddings and similarity? For example, I get the relation "Alice, works at, Adidas" from the OIE model and want to map the relation "works for" to my defined relation "Is Employed At"(based on my ontology). Hope I made myself clear. If not we can exchange thrpuh PM. Thanks!

Posted in Ask·
Avatar of Mark KramMark Kram
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Seeking Guidance on Triples Extraction with Language Models

Hello, is there anyone here with experience in applying Language models and other Machine Learning Techniques to extract triples from text? I have a question regarding the mapping of the extracted predicates to my defined predicates in the ontology.

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Posted in Ask·
Avatar of Mark KramMark Kram
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Seeking Certified Data Engineering Programs with Graph Database Focus

Hello all. I am looking for a certified program in the field of Data Engineering with focus on Graph Databases, Semantic Engineering, Enterprise Data Architectures . So far, the certificates I have found in the web (e.g. IBM, DASCA) seem to only cover "conventional" Database technologies. Does somebody know a certified program that fits my description? In order to have it supported by the company I am working at it needs to be a program with a recognized certification and not a independent "online course". Thank you very much in advance!

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Posted in Ask The Ontologists·
Avatar of Mark KramMark Kram
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Recommended Tools for Searching Existing Ontologies

Besides schema.org, what tools/websites can you recommend for searching existing ontologies?

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Commented on Seeking Open Source Tools for Linked Data and Onto...·Posted inAsk
Avatar of Mark Kram
Mark Kram
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thanks a lot! I will definetly look into them. Have got experience with any of the tools?

Posted in Ask·
Avatar of Mark KramMark Kram
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Seeking Open Source Tools for Linked Data and Ontology Development

Hello together, I hope I am at the right place here with my question. At my company we started a project where we want to apply for the first time linked data/ontology concepts (more info: https://foodrisklabs.bfr.bund.de/fskx-food-safety-knowledge-exchange-format/). In this regard, we are searching for the right software tools (preferably Open Source) to use in our project. Do you have any tool (or software library) recommendations for 1. Collaborative maintainance and development of ontologies across interdisciplinary teams 2. for the transformation of excel data into predefined RDF format? Thank you very much in advance!

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