How to document required entry fields

[tprohas]

Hello all,

I am trying to figure out what the correct way to document something like required order entry fields.

Say if I have a form where a employee creates new new order and I have a certain number of fields that are required how do I document this in UML?

[«Midnight»]

I think this depends on what type of diagram you are creating. For example, on an EA data diagram - which is an extension to UML - you can mark the column as required. I cannot remember the exact box to check just now, but it is not difficult to see on the dialog.

On a class diagram you may have to create a contraint. For example, with a string field you could specify something like <>"".

There must be easier ways though. Please jump in folks.

[tprohas]

I think you answered my question well, I should have asked it a bit better. Here is a another question. What other diagrams would required fields be in. I can understand how the class and data diagrams would incorporate required fields into their properties, but what about use cases and other requirements analysis?