Load the PSD/QTO catalog of release ("IFC2X3", "IFC4",
"IFC4X3"), or of all three when omitted, into this module instance.
Each edition is read once, checked against its pinned SHA-256 and
cached; loading it again is a no-op. Until its release is loaded, a
write to a Pset_/Qto_ set throws catalog-not-loaded.
Load the PSD/QTO catalog of
release("IFC2X3","IFC4","IFC4X3"), or of all three when omitted, into this module instance. Each edition is read once, checked against its pinned SHA-256 and cached; loading it again is a no-op. Until its release is loaded, a write to aPset_/Qto_set throwscatalog-not-loaded.