Building Definition Language

A BDL Module is a reusable unit containing related declarations.

Modules may define:

core language Types;

structural Types;

Interface families;

Cartridge families;

utility systems;

regional Profiles;

product libraries;

reusable assemblies;

project zones.

A BDL Package is a versioned collection of Modules, resources, schemas, signatures, and evidence references distributed as one controlled unit.

Every Module shall declare:

Module ID;

namespace;

version;

dependencies;

exported declarations;

applicable BDL versions;

status;

publisher;

integrity information.

Example:

module s05.structural.nodes version "1.2" {

export type UniversalNode;

export type NodeFace;

export relationship structural_connection;

}

Imports shall identify the required version or compatible range:

import s05.structural.nodes version "^1.2";

Circular Module dependencies shall be rejected unless the language specification explicitly defines a safe resolution mechanism.

Package contents shall be reproducible. A compiled result shall record the exact Module versions used rather than relying upon an unspecified “latest” version.