User talk:Modelpractice

=Modelling Theory=

Justification

 * Modelling as widely known: UML, MDA, ERM, ...
 * Modelling is every day job in thinking => Abstraction
 * Relational vs Functional

Basic Relational Structures

 * Single unary relation: R(x)
 * Many unary relations: R(x) S(y) T(z)
 * Single n-ary relations: R(x, y, z)
 * Many n-ary realtions: R(x), S(y, z)

Objects
R(x)

Objects: like ...

Set of objects: {A, B, C, ...}

Determine set by property: all ...; i.e. { x | R(x) }

i.e. find defining property woodwind instrument, ...

Properties
R(x) S(y) T(z)

Relationships
R(x, y, z)

Modelpractice (talk) 12:01, 27 June 2012 (UTC)