CALL THIS FIRST, as soon as the user gives you a token. It answers within seconds, while the network graph is still being built - use that time to think.

THE CIRCUITS OF A MODEL IN FOUR CALLS:

1. read_ifc_overview - this call: the types of the model.

2. apply_ifc_rules - your rules. Give air handling units, monoblocs and ventilation casings the role centrale_de_traitement_d_air, and fans the role ventilateur, exactly these words. Its answer lists under 'equipements' every unit and fan of the model.

3. trace_duct_circuits with ONLY the token - it computes nothing and returns the COMPLETE list of the model's systems and units.

4. trace_duct_circuits again with what the user wants: systems and/or units, or all_networks=true for the whole model (offered up to 50 air networks only). The answer of this call repeats these steps under 'marche_a_suivre'.

YOU SEE A SAMPLE, THE TOOL SEES EVERYTHING. This overview shows one example per type, not every piece: you cannot count the units, the fans or the networks of the model from it, and you must not believe you have seen them all. The tool applies your rules to every piece and walks every network. So never pick the networks to compute from this overview: trace_duct_circuits gives you the complete list of systems and units first, and you choose from THAT list.

WHAT YOU GET. Not 3 000 parts: the 20 to 50 distinct TYPES of the model (duct types, fittings, dampers, terminals, equipment, proxies), each with its IFC class, predefined type, type name, one example part with ALL its properties, and a catalogue of every property present.

WHAT TO DO WITH IT. Write RULES, not verdicts. For roles: which words, in which field, identify a fire damper, a silencer, a balancing damper, an air terminal, an air handling unit, a fan, a pump - and which groups are NOT network at all (access zones, plinths, placeholders, damper motors). For sizes: which 'PropertySet.Property' holds height, width, diameter, length. A rule applies to every part, including those you were not shown, and to the user's next models.

TRAPS the field 'a_savoir' warns about: values are in the FILE's unit (see metres_par_unite), not millimetres; insulation sizes and hydraulic diameters look like dimensions and are not.

The field 'etat_du_graphe' says whether the networks are ready yet: 'pret' means read_ifc_networks will answer now.