"Allow loose classpath" checkbox in RAD

In Rational Application Developer 7.5 under Preferences -> Java EE there's a checkbox with the label, "Allow loose classpath module dependencies (not recommended)". What does that checkbox do, and under what sor开发者_JAVA技巧t of circumstances would I want to check it?

The RAD7.5 initially missed the documentation on that particular option.

Rational Application Developer v7.5 Help - Documentation needed for Preferences - Java EE : Loose classpath module dependencies [ ] Allow loose classpath module dependencies (not recommended)

The RAD Help Center now includes a "loose classpath" page

Loose classpath support is an optional mechanism that allows for the inclusion of Eclipse Java development Tools classpath artifacts in a dynamic Web project's WEB-INF/lib folder.
You can add dependencies using the Java EE Module Dependencies page, but you can also add the Web libraries from the Libraries page under the Java Build Page.
You can include Jars, external Jars, libraries, and variables.
The project validator now detects loose classpath issues and reports them in the problems view.