# description
A portable, metadata-only snapshot of a magician's library.

# $defs.provider.properties.id.description
A stable, DNS-style identifier controlled by the provider.

# $defs.source.properties.variant_id.description
A provider-controlled variant identifier when the item ID alone is not specific enough.

# $defs.holding.properties.acquired_at.description
The most recent acquisition time represented by this holding.

# $defs.link.properties.type.description
An optional media type for the linked resource.

# $defs.extensions.description
Provider-specific data keyed by a DNS-style namespace.

# $defs.libraryItem.properties.access_methods.description
Ways the customer can access digital material.