Optional ReadonlyavailableWhen given, entries that require a domain outside this list are left out.
Optional ReadonlyconventionWhen given, only entries that accept this convention identity, such as napplet:profile/open.
Optional ReadonlytextFree text, matched loosely against title, topics, roles, description and publisher.
Optional ReadonlytopicsTopics the entry must carry, all of them.
What the store filters by. Every part is optional; an empty query lists everything.