Datamallikaaviot

Datamallikaaviot are diagrams that visualize data models used in information systems. They map how data elements relate, and typically show entities or data types, attributes, primary and foreign keys, and the constraints that govern data integrity. They serve as a common reference for software developers, data engineers, and business stakeholders during design, integration, and governance activities.

The term is primarily encountered in Finnish-language software design literature, combining datamalli (data model) with kaaviot (diagrams). In other contexts, the concept is often described as data models diagrams or entity-relationship diagrams.

A datamallikaavio can be conceptual, logical, or physical. Conceptual diagrams emphasize high-level data concepts and scope, while logical diagrams define detailed entities, attributes, keys, and relationships without implementation specifics. Physical diagrams incorporate concrete data types, indexes, and storage considerations.

Elements typically include entities (or tables), attributes (or columns), keys, relationships, cardinalities, and constraints such as not null or unique. Metadata may include data owners, data steward roles, and lineage information.

Tools include dedicated data modeling software, drawing tools, and database design environments. Diagrams can be created manually or generated from source schemas, and are often synchronized with data catalogs and governance platforms.

Applications include database design, data integration planning, data governance, impact analysis, and communication among stakeholders.

Related concepts include data model, ER diagram, and UML class diagram.