Multiple inheritance with interfaces

// A thing that sits somewhere on the map.
public interface ILocatable {
    [GeoCoordinateProperty(Indexed = true)]
    GeoCoordinate Location { get; set; }

    [StringProperty(Indexed = true, MaxLength = 2)]
    string CountryCode { get; set; }
}

// A thing with an identity, a name and a slug.
public interface INamedNode {
    Guid Id { get; set; }
    NodeMeta Meta { get; }

    [StringProperty(Indexed = true, IndexedByWords = true, PrefixSearch = true, DisplayName = true)]
    string Title { get; set; }

    [AddressProperty]
    string Slug { get; }          // the node's address, set with db.UpdateAddress
}

// A thing with a searchable rich-text body.
public interface IDescribed {
    [HtmlProperty(IndexedByWords = true, IndexedBySemantic = true)]
    string Description { get; set; }
}

// A thing that can be tagged.
public interface ITagged {
    [StringArrayProperty(Indexed = true)]
    string[] Tags { get; set; }
}

public interface IVenue    : INamedNode, IDescribed, ILocatable, ITagged { /* venue-only    */ }
public interface IEvent    : INamedNode, IDescribed,              ITagged { /* event-only    */ }
public interface IAttendee : INamedNode,              ILocatable          { /* attendee-only */ }