Object-Role Modeling (ORM) is a powerful method for designing and querying information systems at the conceptual level. It is an easy and understandable description of the application for non-technical users.

Object-Role Modeling (ORM) is a conceptual modeling approach used in software engineering and database design to analyze and model the structure and behavior of systems. It focuses on representing the real-world entities, their properties, and relationships in a clear and understandable manner, without getting bogged down in technical implementation details.

Key aspects of ORM include:

Objects: ORM views the world in terms of objects, which are entities that have identity, attributes, and relationships with other objects.
Roles: Roles represent the behavior or function of an object within a particular context or relationship. For example, in a customer-salesperson interaction, a customer may play the role of “buyer” while a salesperson plays the role of “seller”.
Facts: ORM models are built on facts, which are statements about objects and their relationships. Facts are expressed using natural language statements, making them easily understandable by stakeholders.
Constraints: ORM allows for the specification of constraints, such as uniqueness constraints or cardinality constraints, which help ensure the integrity and consistency of the model.

ORM is often used as a precursor to database design, as it provides a clear and expressive way to represent the structure and behavior of the domain being modeled. It helps bridge the gap between business requirements and technical implementation, facilitating better communication between stakeholders and developers. Additionally, ORM tools and methodologies can be used to automatically generate database schemas or object-oriented code from the conceptual model, speeding up the development process and reducing the likelihood of errors.