| Interface | Description | 
|---|---|
| SpaceDocumentColumnFamilyMapper | 
 An interface for mapping types to column families and for mapping space documents to column
 family rows. 
 | 
| Class | Description | 
|---|---|
| DefaultSpaceDocumentColumnFamilyMapper | 
 The default  
SpaceDocumentColumnFamilyMapper implementation. | 
| SpaceTypeDescriptorHolder | 
 A  
SpaceTypeDescriptor holder which serializes/deserializes its underlying SpaceTypeDescriptor In a version compatible manner. | 
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