Understanding key concepts: semantics, ontology, knowledge graph

Semantics: giving meaning to data
Semantics involves structuring and interpreting data so that AI understands what it means, not just how it is organized.
Semantics gives AI the ability to reason with business concepts as they actually exist in the organization.
Ontology: structuring an organization's knowledge
An ontology is an explicit representation of the key concepts in a domain (objects, actions, events, roles, etc.) and the relationships between them.
It is, in a way, the mental map of the company, but in a format that AI can understand.
It describes:
– business entities (customer, machine, procedure, contract, etc.)
– their properties
– their relationships
– their interaction rules
Unlike a data dictionary, an ontology formalizes meaning, not just technical fields.


The knowledge graph: making knowledge usable
The knowledge graph is the living embodiment of ontology.
It organizes data and knowledge in graph form, enabling AI to navigate links, understand relationships, and infer new information.
Why semantics and ontology have become essential for AI
Without business context, AI remains generic. This is one of the main obstacles to its adoption in companies. When AI does not truly understand an organization's processes, data, or internal language, it produces results that are too generic and often out of step with operational needs. Teams then perceive it as a "standalone" tool that is difficult to integrate into existing workflows and whose real value seems limited.
This disconnect quickly creates mistrust. Employees are reluctant to use systems that they do not consider accurate or reliable. Management finds itself faced with projects that run out of steam, are costly to maintain, and are unable to scale up. POCs follow one after another without leading to industrialization, due to a lack of a foundation that is sufficiently rooted in the reality of the business.
These findings, widely documented in market studies and field reports, converge: AI that is not contextualized will fail sooner or later. To be useful and sustainable, AI must understand the organization in which it operates. This is where semantics and ontology become essential.
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The Cleyrop method for a reliable business ontology

An ontology generated and enriched by AI
Cleyrop has made a strong technological choice: to natively integrate a semantic business layer into its platform, automatically fed by the organization's data.
The platform ingests all types of data (structured, unstructured, logs, IoT, documents, etc.).
- ensures governance, quality, traceability
- creates a reliable foundation for AI
- automatically generates an initial business ontology
- enriches it use case after use case, organically
This approach allows ontology to become alive and directly operational.
A native semantic layer: a strategic differentiator
A truly useful ontology must be specific to each organization. There is no generic model that works for everyone, nor is there an industrial template capable of capturing the uniqueness of a profession.
Every company has its own vocabulary, processes, constraints, and internal rules.
That's why Cleyrop builds a semantic layer that is fully tailored to each customer's context, based on their actual data and use cases.


The Knowledge Graph as a contextual backbone
The knowledge graph is the living embodiment of ontology.
Analytics use cases, AI Agents, and Enterprise GPT rely on this semantic layer to offer:
- more precision;
- more relevant;
- more explainability;
- more confidence.
This is what allows AI to be aligned with business lines, rather than the other way around.




