Toad World® Forums

How is the Designer View Model called?


#1

Hi

ERD or ERM is too “little”

physical ERD schematic?

Regards,

Tobias


#2

Hello Tobias,

I’m afraid, I don’t understand your question.

Generally, TDM 3 BETA supports Physical and Logical modeling.
You can view logical and physical names of objects.

Could you please specify your question?

Thanks.

Vladka


#3

Hello vladka,

i mean

but the designer shows also Attributes, PK, FKS, data typ and so on. Because i choose the display level “Attributes”.

How is that Model labeled

Thanks

Tobias


#4

Hello Tobias,

Well, TDM 3 supports logical and physical modeling. For physical modeling, ERD methodology is used. TDM3 supports two notations: IE and IDEF1X.

Concerning the view options in Designer:

  • you can display physical and logical names of objects,
  • you can select what items you need to see in Entity box - See the Display Level combo-box - different options for Logical model and Physical model.

I hope this information will help you a little.

Regards,

Vladka


#5

Hello Vladka,

you described the funktionality.
i mean how is the model called with display level attributes?

for example:
i have a car but i dont know that the car is called car. The car has doors, wheels and so on… and i can switch on the lights…
what is that thing called? -> A car :slight_smile:

if i use the display level entity the model is called ERD… but if i use the display level attributes it is not an ERD because there are to much information… how is that model called?

I hope it makes my question “clear”

Regards,

Tobias


#6

Your example is great! Thanks, now I understand!

i mean how is the model called with display level attributes?

No matter what display level you select, we call it ERD.

See how many items you can select for the display level in PER model - five. For logical modeling there are other items, including Description…
We still call it ERD (regardless the theory), and the only change is visual - once you can see attributes, once keys etc. (We do not use five different names, just ERD.)

Back to your example:

I have a car. You might say it’s a normal car. Nevertheless, it looks a bit different:

  • it is pink and it has several labels on it so as everybody (and particularly me) can see them:
    PUT PETROL HERE (on the filler cap),
    THIS IS A PLACE WHERE THE ENGINE IS. DO NOT OPEN. (on the hood) and
    PLACE FOR YOUR SHOPPING BAGS (on the rear trunk)

-> It’s a car for Vladka. Visually, it is different. But I call it just a CAR.

Regards,

Vladka

Hello Tobias,


#7

Ok Thanks Tobias