Multiple event topics in OSGi Declarative Service component description

I'm sure it's really simple, but I fail to understand the required XML schema to make my component listen to multiple event topics in the OSGi framework.

I want to handle the following 2 events and at some point even more:

basm/event/IAM
basm/event/COV

I tried stuff like this

<properties name="event.topics">
    <entry>basm/event/IAM</entry>
    <entry>basm/event/COV</entry>
</properties>

or

<property name="event.topics" type="String" value="basm/event/IAM,basm/event/COV" />

or

<property name="event.topics" type="String" value="basm/event/IAM" />
<property name="event.topics" type="String" value="basm/event/COV" />

Unfortunately my OSGi book only ever uses one event topic and I surprisingly couldn't find anything on the net. I tried to go by the XML schema for DS component description but failed to understand it: http://ift.tt/1nZiL3k