CONCEPT OF DATA NAMES

User defined word
Address of the Location where data is stored in Computer Storage.
Some times called field name/variable.
Field name means address of some location in the in the Storage (RAM) Exp. As the name of some house, `Geoffery Mansion' or `U-K-HOUSE' COUNTER, etc.
It should be some understandable, which represents the data.
It is defined unique, because address is always unique. It is a reference to a field.
It is also called data item, Elementary item or Group item.
It must contain one alphabetic character.