Looking for ::quartus::chip_editor::get_node_info documentation

[Cross-posted to "Quartus II and EDA Tools Discussion" forum.]

This relates to the Quartus TCL hooks available through QUIP. I am trying to use ::quartus::chip_editor::get_node_info, but the documentation for get_node_info in the Quartus II Scripting Reference Manual (page 2-367 in 11/6/07 version) appears to apply only to ::quartus::sta::get_node_info. For example, the documentation lists "type" as a valid field to query, but ::quartus::chip_editor::get_node_info calls "type" an illegal net_node_info value.

# project is already open, and netlist has been read
foreach_in_collection node_id  {
    set name    #  works
    set type    #  doesn't work
}

I understand that get_node_info returns a collection, but I guess I don't understand collections enough to know whether they provide a way for me to browse their available fields. Is there some applicable documentation for ::quartus::chip_editor::get_node_info or is there a general way to inspect collection fields?