Alex Blewitt created FELIX-4412:
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             Summary: Add Provide-Capability for declarative services bundle
                 Key: FELIX-4412
                 URL: https://issues.apache.org/jira/browse/FELIX-4412
             Project: Felix
          Issue Type: Bug
          Components: Declarative Services (SCR)
            Reporter: Alex Blewitt
            Priority: Minor


To allow bundles to declare that they need declarative services, a 
Provide-Capability should be defined on the DS bundle such that clients can 
depend on it, for example:

Provide-Capability: 
osgi.extender;osgi.extender="osgi.service.component";version:=1.1.0

This would allow clients to require that there be a Declarative Services bundle 
without actually declaring a package dependency:

Require-Capability: 
osgi.extender;filter:="(&(osgi.extender=osgi.service.component")(version>1.0.0))"

The name of the declarative services component isn't well defined but 
osgi.service.component or osgi.declarative.services might be used.



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