Building Definition Language

Annotations provide supplemental information that does not alter core BDL engineering semantics unless a Profile explicitly assigns meaning to it.

Annotations may include:

human-readable descriptions;

labels;

translations;

drawing references;

authoring notes;

review comments;

visualization preferences;

manufacturer information;

user-interface hints;

research tags.

Example:

}

Core metadata shall include:

author;

organization;

creation date;

modification date;

document status;

source;

approval;

confidentiality;

applicable configuration.

Metadata that affects engineering interpretation shall be promoted to a typed core Property rather than left as an informal annotation.

Tools may ignore unknown noncritical annotations but shall preserve them during round-trip editing where possible.

Annotations shall not override:

identity;

Type;

units;

constraints;

Profiles;

certification;

configuration state.