The design of the database is crucial to the process of designing almost an
y Information System (IS) and involves two clearly identifiable key concept
s: schema and data model, the latter allowing us to define the former Never
theless. the term "model" is commonly applied indistinctly to both. the con
fusion arising from the fact that in Software Engineering (SE), unlike in f
ormal or empirical sciences, the notion of "model" has a double meaning of
which we are not always aware. If Av take our idea of "model" directly from
empirical sciences, then the schema of a database would actually be a mode
l. whereas the data model would be a set of tools allowing its to define su
ch a schema.
The present paper discusses the meaning of "model" in the area of Software
Engineering from a philosophical point of view an important topic for the c
onfusion arising directly affects other debates A-here "model" is a key con
cept. We would also suggest that the need for a philosophical discussion on
the concept of data model is a further argument in favour of institutional
izing a new, area of knowledge, which could be called: " Philosophy of Engi
neering".