Adatmodell

In Hungarian, adatmodell refers to the concept of a data model. A data model is a formal representation of data elements and their relationships. It defines how data is stored, organized, and accessed by an information system. It serves as a blueprint for database design and application development, independent of particular technologies.

Data modeling typically distinguishes conceptual, logical, and physical models. The conceptual model describes high-level entities and relationships without technical detail; the logical model adds attributes, keys, and integrity constraints and is independent of a specific DBMS; the physical model translates the design into storage structures such as tables, columns, indexes, and storage parameters.

Common data models include relational, entity-relationship, object-oriented, document, graph, and key-value models. They each impose different constraints and support different query mechanisms. The core building blocks are entities or objects, attributes, and relationships, as well as constraints such as primary keys, foreign keys, and domain rules.

Data modeling supports database design, data integration, data quality, and governance. It aims to ensure data consistency, traceability, and interoperability across systems and applications. In practice, data models are represented with diagrams such as ER diagrams or UML class diagrams, and mapped to database schemas during implementation.