OpenHome Metadata Format

OpenHome Metadata format describes metadata for an audio track as a series of key-value pairs.

The list of supported keys, their mapping into DIDL-Lite and the number of instances that may be used are listed below:

Key	DIDL-Lite mapping	Instances
uri	res	1
id	@id in item	[0..1]
type	track -> object.item.audioItem.musicTrack	[0..1]
provider	oh:provider	[0..1]
title	dc:title	[0..1]
artwork	oh:artwork	[0..1]
artist	upnp:artist	[0..n]
composer	upnp:artist @role=composer	[0..n]
conductor	upnp:artist @role=conductor	[0..n]
genre	upnp:genre	[0..n]
albumTitle	upnp:album	[0..1]
albumArtwork	upnp:albumArtURI	[0..1]
albumArtist	upnp:artist @role=AlbumArtist	[0..n]
albumGenre	upnp:genre	[0..n]
year	dc:date	[0..1]
disc	oh:originalDiscNumber	[0..1]
discs	oh:originalDiscCount	[0..1]
track	upnp:originalTrackNumber	[0..1]
tracks	oh:originalTrackCount	[0..1]
channels	res @nrAudioChannels	[0..1]
bitDepth	res @bitsPerSample	[0..1]
sampleRate	res @sampleFrequency	[0..1]
bitRate	res @bitrate (integer / string of digits)	[0..1]
duration	res @duration (seconds - string of digits, zero = live/eternal)	[0..1]
mimeType	res @protocolInfo	[0..1]
work	oh:work	[0..1]
movement	oh:movement	[0..1]
show	oh:show	[0..1]
episode	oh:episodeNumber	[0..1]
episodes	oh:episodeCount	[0..1]
author	dc:author	[0..n]
narrator	upnp:artist @role=narrator	[0..n]
performer	upnp:artist @role=performer	[0..n]
publisher	dc:publisher	[0..1]
published	oh:published (ISO 8601)	[0..1]
website	oh:website	[0..1]
location	oh:location (ISO 6709)	[0..1]
details	oh:details	[0..1]
description	dc:description	[0..1]
rating	upnp:rating	[0..1]
extensions	oh:extensions	[0..1]