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Conceptual Model Types (CSDL)

Conceptual schema definition language (CSDL) supports a set of abstract primitive data types, called EDMSimpleTypes, that define properties in a conceptual model. EDMSimpleTypes are proxies for primitive data types that are supported in the storage or hosting environment. For information about how the Entity Framework maps EDMSimpleTypes to SQL Server data types, see SqlClient for Entity FrameworkTypes.

The table below lists the primitive data types that are supported by CSDL. The table also lists the facets that can be applied to each EDMSimpleType.

EDMSimpleType Description Applicable Facets

Edm.Binary

Contains binary data.

MaxLength, FixedLength, Nullable, Default

Edm.Boolean

Contains the value true or false.

Nullable, Default

Edm.Byte

Contains an unsigned 8-bit integer value.

Precision, Nullable, Default

Edm.DateTime

Represents a date and time.

Precision, Nullable, Default

Edm.DateTimeOffset

Contains a date and time as an offset in minutes from GMT.

Precision, Nullable, Default

Edm.Decimal

Contains a numeric value with fixed precision and scale.

Precision, Nullable, Default

Edm.Double

Contains a floating point number with 15-digit precision.

Precision, Nullable, Default

Edm.Float

Contains a floating point number with 7-digit precision.

Precision, Nullable, Default

Edm.Guid

Contains a 16-byte unique identifier.

Precision, Nullable, Default

Edm.Int16

Contains a signed 16-bit integer value.

Precision, Nullable, Default

Edm.Int32

Contains a signed 32-bit integer value.

Precision, Nullable, Default

Edm.Int64

Contains a signed 64-bit integer value.

Precision, Nullable, Default

Edm.SByte

Contains a signed 8-bit integer value.

Precision, Nullable, Default

Edm.String

Contains character data.

Unicode, FixedLength, MaxLength, Collation, Precision, Nullable, Default

Edm.Time

Contains a time of day.

Precision, Nullable, Default

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