Querying across the hierarchy

var oslo = new GeoCoordinate(59.9139, 10.7522);

// Every locatable node within 5 km: venues and attendees together
var nearby = db.Query<ILocatable>()
               .Where(x => x.Location.IsWithin(oslo, 5_000))
               .Execute();

foreach (var x in nearby) {
    Console.WriteLine(x switch {
        IVenue v    => $"Venue: {v.Title}",
        IAttendee a => $"Attendee: {a.Title}",
        _           => "Something else"
    });
}

// One search box over everything that has a title
var hits = db.Query<INamedNode>()
             .WhereSearch("outdoor jazz", semanticRatio: 0.5)
             .Execute();

// One tag cloud over everything taggable
var tagCloud = db.Query<ITagged>().Facets().AddValueFacet(x => x.Tags).Execute();

// Narrowed back to specific types when you want that
var venuesOnly = db.Query<ILocatable>()
                   .WhereTypes(new[] { typeof(IVenue) }, includeDescendants: true)
                   .Where(x => x.CountryCode == "NO")
                   .Execute();