> A user (subscriber) can subscribe (follow) topics. Updates are
> published, each about one or more topics. What we want is an ability
> to query for updates for a given subscriber based on his/her followed
> topics. This is what I came up with:

> class Subscriber
> {
>   public string Id { get; set;}
>   public string[] FollowedTopics { get; set; }
> }

> class Update
> {
>   public string Id { get; set; }
>   public string Title { get; set; }

>   // More irrelevant properties

>   public string[] Topics { get; set; }
> }

> Now I really don't know how to query this efficiently. MultiMap index?
> Is the schema ok for the problem? Other suggestions?

> Thanks,
> Maciek