Building Definition Language

BDL shall be responsible for expressing:

persistent building and entity identities;

entity Types and Instance relationships;

spatial and coordinate relationships;

physical and logical composition;

Interface and connection definitions;

provided and required capabilities;

topology and dependencies;

applicable Engineering Profiles;

engineering requirements and constraints;

configuration states and alternatives;

evidence and provenance;

unresolved assumptions and unknown values;

version and revision relationships;

data required by the Engineering Compiler;

traceability to BIOS and Digital Twin objects.

BDL shall also define whether a statement is:

required;

preferred;

optional;

prohibited;

proposed;

observed;

verified;

inferred;

A BDL declaration generated by software or AI shall identify its generator, version, source inputs, and review status.