This format is used to Create/Alter the Units of Measure in the Tally. 
Columns in Units:

Name
Data Type: Text.
Field In Tally: Symbol.
Description: Name of the Ledger Group. It is the Primary Key in the Ledgers. If the name already exists in Tally then the old record will be replaced with the new record.

IsSimpleUnit
Data Type: Text. (Yes/No)
Field In Tally: -NA-
Description: Unit type. Yes if Simple Unit else No for Compound Unit. 

OriginalName 
Data Type: Text. 
Field In Tally: Formal Name.
Description: Formal Name of the Unit.

DecimalPlaces
Data Type: Number.
Field In Tally: Number of Decimal Places.
Description: Decimal Places for the Unit.

BaseUnits 
Data Type: Text.
Field In Tally: First unit.
Description: Base unit Name if the Unit is Compound Unit.

AdditionalUnits 
Data Type: Text.
Field In Tally: Second unit.
Description: Additional unit Name if the Unit is Compound Unit.

Conversion
Data Type: Number.
Field In Tally: Conversion.
Description: Conversion Factor if the Unit is Compound Unit.