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Conceptual schema
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<p>A conceptual schema or conceptual data model is a high-level description of informational needs underlying the design of a <a href="/facts/Database/VYcpkevb">database</a>. It typically includes only the core concepts and the main relationships among them. This is a high-level model with insufficient detail to build a complete, functional database. It describes the structure of the whole database for a group of users. The conceptual model is also known as the <a href="/facts/Data_model/j1YyzpJ3">data model</a> that can be used to describe the conceptual schema when a database system is implemented. It hides the internal details of physical storage and targets the description of entities, datatypes, relationships and constraints. </p>