Digital - Format of records. Another word for Electronic
Data - raw facts, base elements which make up a record or document
Digital Signature - this is a way of identifying the author and thus authenticity of a record, document or file which has been transferred electronically. In essence it is an encryption method that has been created to be unique to the author who one "key" to encrypt the document and sends another "key" to the recipient of the message so that they can decrypt the file sent. This is supposed to be one of the safest ways of data transfer.
Document - term used to describe some records or files held within a RMS (Records Management System)