Why Logical Data Independence Important?

The logical data
independence is the key side of database management system for
maintaining data integrity and for maintain overall effectiveness of
data usage. Logical data nouns is an important part of three schema
architecture which allows the change or modification of conceptual
schema short disturbing the external schema. The modifications in
conceptual schema may include alteration of entities, attributes,
relationships etc. Changing any of these elements will not disturb the
external application programs which is a key advantage of logical
information independence feature of database management systems.