| AbstractField | 
 Abstract parent class for all fields 
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| BinaryField | 
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| ExternalizableField | 
 A field for managing externalizable metadata. 
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| Form | 
 Abstraction of the form submitted by the client. 
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| ReferenceField | 
 This field is used for reference metadata 
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| RepeaterField | 
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| RepeaterField.RepeaterEntry | 
A repeater entry is a  Form with new position and
 old position.  
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| RichTextField | 
A rich text field for managing  RichText metadata.  
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| SimpleField<T> | 
A string field for managing  String metadata.  
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| SubContentField | 
 This field is used for subcontent metadata 
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