A sequence diagram uses vertical lines, horizontal arrows, and boxes to show the interactions and messages between objects over time. You should use the right notation and symbols for your UML ...

UML modeling and CASE tools by Visual Paradigm Visual Paradigm for the Unified Modeling Language (VP-UML) is a full-featured UML tool designed for building large scale software systems reliably ...

And because UML uses simple, intuitive notation, nonprogrammers can also understand UML models. In fact, many of the language’s supporters claim that UML’s simplicity is its chief benefit.

Many CASE tools support reverse engineering and UML. However, it can be observed that, usually, only a subset of the UML notation is supported, namely those parts with a more or less direct code ...