ComplexConfiguration and ComplexConfiguration<TClass> instances are created or retrieved by the ComplexType methods of the FluentMappingBuilder class. These classes are intended to define mapping of the properties, belonging to a complex type, instead of setting this mapping for all entities, having a property of this complex type.

The example below demonstrates defining mapping for some properties of the complex type:

builder.ComplexType<AddressType>()
    .Property(p => p.Country)
        .ColumnName(@"COUNTRY")
        .NotNullable()
        .MaxLength(100)
        .NonUnicode()
        .VariableLength();
 
builder.ComplexType<AddressType>()
    .Property(p => p.City)
        .ColumnName(@"CITY")
        .NotNullable()
        .ServerDataType(@"VARCHAR2(100) NOT NULL");

For more detains on defining the association mapping see the Association Configuration Classes topic.