UI for setting up runtime classpath

Hi team,

I have a question regarding the Compiled Classes target customizer.

The customizes has several tabs: General, General Classpath, Runtime 
Classpath, Boot Classpath.

While I understand the purpose of General Classpath (this is what is 
passed to the compiler, right ?), I don't understand why Runtime 
Classpath and Boot Classpath are here.

First, I may not be building a runnable project, but a reusable library, 
which can not be run on its own. So runtime classpath is not always 
appropriate.

Secondly, My project could have several Compiled Classes targets (each 
of which will have its own runtime classpath), but there may be only one 
way to run it. So how will then the runtime classpath be determined ? 
Which of the Compiled Classes targets will be used ?

Thirdly, I may not need to set up classpath for running my project at 
all, when I for example run my project in a container (web server, J2EE 
server). Then the server determines the classloading.

So setting runtime classpath on the Compile Classes target does not make 
sense - instead the user should set it on the execution profile for 
running a "main" class. Would not that make more sense ?

Petr