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Data type for the field
Source position: db.pas line 198
 published property TFieldDef.DataType : TFieldType  | 
DataType contains the data type of the field's contents. Based on this property, the FieldClass property determines what kind of field class must be used to represent this field.
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TField class used for this fielddef  | 
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Create TField instance based on definitions in current TFieldDef instance.  |