[abh19]

Originally Posted by vballas

Are Contextes the equivalent to Tags ?

No. A context is a location or environment which contains the tools you need to get an action done.

Originally Posted by vballas

If yes, can I assign more than one Context to a Task / Project ?

Projects themselves do not have contexts: only actions have contexts, and each action can have only one context.

Originally Posted by vballas

Can I give a project a Context and have it auto placed in all of its tasks ?

Yes. You can set the Default Context for a project in several ways, including right-clicking on the project and selecting the pop-up menu in the project Inspector.

Originally Posted by vballas

Can I have subtasks ? These would be minor task steps.

Yes. These are called action groups.

Originally Posted by vballas

Is there integration with Contacts ?
If yes, can I assign a contact(s) to a task ?

I believe that there is no integration with AddressBook, but you can assign an action to a person. There are two ways to do this:

1) If the action will be done by the other person (i.e. you're giving the task to someone else but you want to keep track of it), then you can set the context to "Waiting for". If you create a context called "Waiting for" and put the entire context on hold (this can be done in context view, in the inspector), then the project will be halted until you check off that waiting-for step (if it's the first action in the project). You should review these stalled projects daily.

2) If you'll be the one performing the action, but it involves another person, you can set the action's context to that person. Basically, your contact becomes a context.

Originally Posted by vballas

Can I have Seq/Parallel assigned to Tasks and not overal to the project ?

Not to individual actions, but an action group can have its own sequential or parallel attribute.

OmniFocus can be confusing at first. You can find helpful resources in the OmniFocus page and the Omnifocus Manual.