# properties.source.description
An identifier (e.g., GUID, filename, or URL) to use to direct one back to the audio source.

# properties.sourceHash.description
The unique file hash associated with the source audio file.

# properties.enclosures.description
The links to the various instances of this audio

# properties.duration.description
The known accepted duration of this audio asset in seconds

# properties.isAvailable.description
Is this audio available and ready for access

# properties.availabilityMessage.description
Description associated with the availability

# properties.streamExpirationDateTime.description
The date and time that this stream expires, in RFC3339 full-date-time format

# properties.transcriptLink.description
A link to the document representing the transcript of this audio

# properties.transcriptWebPageLink.description
A link to the web page where the transcript of this audio is displayed

# properties.embeddedPlayerLink.description
A link to an embedded audio player serving this audio