There are serveral notations for data modeling. The actual model
is frequently called Entity Relationship model, because it
depicts data in terms of the entities and relationships
described in the data. An entity -relationship model (ERM) is an
abstract conceptual representation of structured data. Entity-
relationship modeling is a relational schema database modeling
method, used in software e Published Articles » Data Modelling
Data modeling is the process of creating a data model by
applying formal data model descriptions using data modeling
techniques. Data modeling is a method used to define and analyze
data requirements needed to support the business process of an
organization. The data requirements are recorded as a conceptual
data model with associated data definitions. A data model
instance may be one of 3 kinds: Conceptual Schema: describes the
semantics of a domain, being the scope of the model. For
example, it may be a model of the interest area of an
organization or industry. This consists of enti