0507 External Schema Type¶
External schema types allow an asset's schema to reference another schema types defined outside the scope of the asset.
The ExternalSchemaType is part of the asset's schema type.
The schema type that is linked to via the LinkedExternalSchemaType relationship is often defined as part of a standard, or a set of types supported by a specific type of technology. It is typically reused in asset schemas when the asset is supporting a standard. It may also be used as types for schema attributes where the schema is defined for a specific technology that has a fixed set of types. For example, a relational database column may be defined with external types that represent the defined types of the database platform where the database schema resides.
The LinkedExternalSchemaType is linked from a SchemaElement to enable it to be used either by a SchemaType or a SchemaAttribute that has its schema type defined in the TypeEmbeddedAttribute classification.
The following types are replaced by the attributes in SchemaAttribute. - BoundedSchemaType - BoundedSchemaElementType - ArraySchemaType - SetSchemaType
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