# Package org.apache.sysds.runtime.compress.colgroup.dictionary

Interface Summary
DictionaryFactory
IDictionary

Class Summary
ACachingMBDictionary
ADictionary: This dictionary class aims to encapsulate the storage and operations over unique tuple values of a column group.
AIdentityDictionary
DeltaDictionary: This dictionary class is a specialization for the DeltaDDCColgroup.
Dictionary: This dictionary class aims to encapsulate the storage and operations over unique floating point values of a column group.
DictLibMatrixMult: Utility interface for dictionary matrix multiplication
IdentityDictionary: A specialized dictionary that exploits the fact that the contained dictionary is an Identity Matrix.
IdentityDictionarySlice
MatrixBlockDictionary
PlaceHolderDict
QDictionary: This dictionary class aims to encapsulate the storage and operations over unique floating point values of a column group.

Enum Summary
DictionaryFactory.Type
IDictionary.DictType