a complete logical view of the database that contains a description of all the data and relationships in the database

an organization of data where each datum is defined only once for the organization, and it relationship to all other data are clearly and uniquely defined as well

a single integrated definition of the enterprise data that is unbiased toward any single application and independent of its access and physical storage

in a database, a schema that describes a conceptual model. [SEMATECH] 2 : the complete description of a schema that describes the entities in an enterprise. It documents all of the entities and their behaviors (semantics) but does not consider run-time details such as performance. The conceptual schema integrates the enterprise by describing-from a global perspective-its relationships and constraints, independent of any single use. [SEMATECH

A consistent collection of data structures expressing the data needs of the organization. This schema is a comprehensive, base level, and logical description of the environment in which an organization exists, free of physical structure and application system considerations.

A conceptual schema, or High-level data model or conceptual data model, is a map of concepts and their relationships, for example, a conceptual schema for a karate studio would include abstractions such as student, belt, grading and tournament.