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= 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]
|}