Assertion: data independence | /r/HasProperty | difficult to achieve
Facets:
Source sentences:
text: Logical data independence is more difficult to achieve than physical data independence, since application programs are heavily dependent on the logical structure of the data that they access.
text: The Logical data independence is difficult to achieve than physical data independence as it requires the flexibility in the design of database and prograll1iller has to foresee the future requirements or modifications in the design.