Optionalcomment?: stringA comment describing the external reference
Integrity hashes for the external resource content
Specifies custom properties.
Specifies the type of external reference. There are built-in types to describe common references. If a type does not exist for the reference being referred to, use the "other" type.
The URL to the external reference
External references provide a way to document systems, sites, and information that may be relevant but are not included with the BOM. They may also establish specific relationships within or external to the BOM.