Electro-optical glazing structures having total-reflection and semi-transparent and totally-transparent modes of operation which are electrically-switchable for use in dynamically controlling electromagnetic radiation flow in diverse applications. Searchable metadata elements may be assigned to all or part of the text document by a user or by a template used to generate the text document. Primary electric power from drop wires is directly transmitted to indoor power wires when the power-converting plug is coupled to the socket terminal block to cause the plug terminals to be connected to the plug-connector terminals. The seat surface is located a distance from an outer end surface of the hull at the rimless proximal end.