The activation attribute for this component.  This can either
be "eager" or "lazy".  If not specified, it
defaults to default-activation attribute of the enclosing
<blueprint> element.

Use to control the initial processing of service references at
                            blueprint context startup.  "mandatory" indicates the context
                            should not start unless the service is available within the
                            specified context startup period.  "optional" indicates availability
                            of this service is not a requirement at bundle startup.

                            NOTE:  No default is specified because this can be overridden
                            by the default-availability attribute of the <blueprint> element.

An optional specifier that can be used to match a service definition
to one created by a specific blueprint component.

depends-on identifies (by id) other components that this component
depends on.  The component only be activated after the
depends-on components are successfully activated.  Also, if there
are <reference> or <reference-list> elements with unstatisfied
manadatory references, then the depends-on relationship will also
be used to determine whether this service is enabled or not.

A filter string used to narrow the search for a matching service
reference.

The interface that the OSGi service must implement and that will be
implemented by the proxy object.
This attribute is optional.