Base SPIRIT identifier group. Identify a SPIRIT document by its by vendor, library and name. Name of the vendor who supplies this file. Name of the logical library this element belongs to. The name of the object. This group of elements identifies a top level item (e.g. a component or a bus definition) with vendor, library, name and a version number Base SPIRIT document reference. Contains vendor, library, name and version attributes. Base SPIRIT document reference type. Contains vendor, library, name and version attributes. Resolved SPIRIT document reference type. Contains vendor, library, name and version attributes and the URI of the referenced SPIRIT document