borland-together

open-source/free borland together clone

Hi all, I was wondering if there is any open-source/free borland together clone to create uml diagrams like class diagrams, use case diagrams, sequence diagrams, etc. Many thanks ...

Has anyone used UML with OCL? Do programmers use it or only analysts who don't code?

I am trying to wrap my head around why we first approach the problem of design and decide upon a visual method (UML), instead of starting with formal specifications that happen to also be executable (RAD prototyping), we start with diagrams that can't be easily proven to work. So when it comes time to prove properties of a model, we fin...