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Conceptual Model 1 (Physical vs Conceptual Model (Model (def) (Modelling…
Conceptual Model 1
Physical vs Conceptual Model
Model (def)
abstract representation of the universe of discourse created for a specific purpose
'universe of discourse' comprises any part or aspect of the existing conceived reality under consideration
Modelling language
design for specific purpose
info is documented using the modeling constructs of the model
Examples of conceptual model
eg. Map
Characteristics of Model
defined for a given purpose
diff conceptual model support diff purposes for the same part of reality
differ in the level of abstraction and details
eg: street map/underground map
easier to comprehend than natural language text
used in daily life frequently
Properties of conceptual model
Descriptive vs Prescriptive Model
Descriptive
document info about current state of the universe of discourse
Prescriptive
intended, future state of the universe discourse
central properties
Reduction Property
Reduction
abstraction mechanisms are used to filter out irrelevant aspects
Abstraction Mechanism
Selection
Particular aspects of the real world are represented in the model, while the other aspects is ignored
only road and settlements
Aggregation
Different aspects are combined and represented in the model in condensed form
settlements as single entities
Classification / Generalization
Commonalities in the real world are generalized and objects are classified
different settlements represented by the same symbols
Extension Property
Additional info not observable in the universe of discourse is added (improve the use of model)
shapes/quadrants
Fundamentals of Conceptual Model
From reality to represntation
Reality :arrow_right: Perception (by senses) :arrow_right: Notional image (conception) :arrow_right: Representation (sign,language,..)
Semiotics of conceptual Model
*diagram d krtas