# Uses of Package
org.apache.sysds.runtime.compress.colgroup

- Packages that use org.apache.sysds.runtime.compress.colgroup
  Package | Description
  --- | ---
  org.apache.sysds.runtime.compress |
  org.apache.sysds.runtime.compress.colgroup |
  org.apache.sysds.runtime.compress.cost |
  org.apache.sysds.runtime.compress.estim |

- Classes in org.apache.sysds.runtime.compress.colgroup used by org.apache.sysds.runtime.compress
  Class | Description
  --- | ---
  AColGroup | Abstract Class that is the lowest class type for the Compression framework.
  AColGroup.CompressionType | Public super types of compression ColGroups supported

- Classes in org.apache.sysds.runtime.compress.colgroup used by org.apache.sysds.runtime.compress.colgroup
  Class | Description
  --- | ---
  AColGroup | Abstract Class that is the lowest class type for the Compression framework.
  AColGroup.CompressionType | Public super types of compression ColGroups supported
  AColGroupCompressed | Base class for column groups encoded Encoded in a compressed manner.
  AColGroupOffset | Base class for column groups encoded with various types of bitmap encoding.
  AColGroupValue | Base class for column groups encoded with value dictionary.
  AMorphingMMColGroup | Abstract class for column group types that do not perform matrix Multiplication, and decompression for performance reasons but instead transforms into another type of column group type to perform that operation.
  APreAgg | Abstract class for all the column groups that use preAggregation for Left matrix multiplications.
  ASDCZero |
  ColGroupDDC | Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC).
  ColGroupEmpty |
  ColGroupSDCSingleZeros | Column group that sparsely encodes the dictionary values.
  ColGroupSDCZeros | Column group that sparsely encodes the dictionary values.

- Classes in org.apache.sysds.runtime.compress.colgroup used by org.apache.sysds.runtime.compress.cost
  Class | Description
  --- | ---
  AColGroup | Abstract Class that is the lowest class type for the Compression framework.

- Classes in org.apache.sysds.runtime.compress.colgroup used by org.apache.sysds.runtime.compress.estim
  Class | Description
  --- | ---
  AColGroup.CompressionType | Public super types of compression ColGroups supported