Deciding whether to use OpenModel or OpenAlias is largely a simple matter of deciding whether instantaneous response is a concern. OpenModel allows for the development of stand-alone applications which can operate on several files one after another or can be launched from a script, and therefore require little interaction with a user.

OpenAlias, on the other hand, is for developers who need instant feedback or wish to integrate new custom features into Alias. The results of using a plug-in appear immediately on the screen.

Still unsure? If so, then it is likely best to start developing plug-ins. OpenAlias generally provides a tighter integration with Alias providing a greater number of possible solutions to design decisions.