in Togaf Data Architecture
i need to understand how/why to represent the logical and physical data component ?
i need to deeply understand them and why i need to draw them?
for example, assume i need to build diagram for school system , so i have teachers and students and subjects and schools and locations(City,Country,Region) entities
how i should draw this on Togaf Architecture style ?
what is the logical and physical component in this case ?
please help me