Building Definition Language

The Universal Node Model shall represent a System05 Node as an identifiable multi-Interface structural coordination Entity.

A Node shall be modeled as more than a geometric point. It shall contain a physical Node Core, Interface Faces, internal load-transfer relationships, locking features, alignment features, inspection features, robotic features, and digital identity.

Every Node shall define:

Node Type and Instance IDs;

topology class;

local coordinate system;

physical geometry;

Node Core;

Interface Faces;

supported directions;

load-transfer matrix;

capacity envelope;

stiffness;

locking system;

alignment system;

inspection provisions;

sensor provisions;

robotic handling features;

material;

protection systems;

lifecycle state.

Example:

node Node_N01 : UniversalStructuralNode {

id: "s05:node:n01";

topology: interior_three_axis;

coordinates: @Node_N01_CS;

geometry: @Node_N01_Geometry;

core: @Node_N01_Steel_Core;

];

capabilities {

load_transfer: combined_actions;

robotic_installation: supported;

digital_identity: embedded;

inspection_access: visual_and_sensor;

}

}

Each Node Face shall be independently represented:

interface N01_X_Positive : StructuralNodeInterface {

id: "s05:interface:n01:x+";

host: @Node_N01;

orientation: positive_x;

datum_system: @N01_XP_Datums;

compatibility_class: @S05_Structural_IF_SC03;

state: available;

}

The Node load path shall identify how forces enter through one Interface Face, pass through the Core, and exit through supporting Faces.

Example:

load_path N01_Beam_To_Column {

input: @N01_X_Positive;

through: @Node_N01_Steel_Core;

output: @N01_Z_Negative;

actions: [shear_z, bending_y];

}

The BDL model shall support future reference geometries without assuming that all Node Types share one physical shape.