Selecting optional dependencies of OSGi-bundles with Ivy

Question

I use Ivy to resolve OSGi bundles, like org.eclipse.jdt:

<dependencies>
    <dependency org="bundle" name="org.eclipse.jdt" rev="x.y.z"/>
</dependencies>

It works fine and gives me all mandatory dependencies.

My question is, how can I select some (not all) optional dependencies of transitive bundles?

I can:

• Select optional dependencies of org.eclipse.jdt by activating use_xxx configuration
• Select all optional dependencies using transitive-optional configuration

What I actually need is a possibility to globally activate a configuration use_yyy. Globally means (applying to all transitive dependencies):

• If a module doesn't have this configuration, do nothing
• If a module does have this configuration, activate it