table.lookup_bool

table highres BOOL {
  "broadband": true,
  "cable": true,
  "dialup": false,
  "mobile": false, # fast but expensive
  "oc12": true,
  "oc3": true,
  "t1": false, # T1 is 1.544Mbps
  "t3": true,
  "satellite": true,
  "wireless": true,
  "xdsl": true
}

# The idea here is to decide to deliver high-resolution media by default
# when we have a sure idea that the client's connection is suitable, and
# to give lower-resolution content when we're sure it's not suitable
# (perhaps also offering a link to a high-res version in that case).
#
# See client.geo.conn_speed

declare local var.highres BOOL;
declare local var.fallback BOOL;

set var.fallback = false; # Could populate this based on some other information
set var.highres = table.lookup_bool(highres, client.geo.conn_speed, var.fallback);