An optional group of data elements detailing a simple subset of Group P.1 to specify the Product form, an optional cover, mandatory body and optionally one or more insert manifests for a single Supplement – an additional item supplied with the product at retail that is NOT considered a <ProductPart>, for example a booklet supplied in PDF form that accompanies a downloadable audio product. Each of these cover, body and insert sections within <SupplementManifest> mirrors the structure of the parts of a <ProductionManifest>.

These manifests may be preceded by a <SequenceNumber> and one or more <SalesOutlet> composites to enable vendor-specific supplements, and a simple <NoSupplement/> indicator may replace the Product form and cover, body and insert manifests to provide a positive indication that a vendor-specific supplement has no ‘generic’ alternative.