Fields

Metadata JSON entities consist of an array of Metadata Entries. Each entry has a key and an array containing one or more fields. Each field contains a single typed value. Fields require a type and appropriate value property.

The value of an HMP metadata field can be a string, a 32-bit signed integer, or a 32-bit unsigned integer. Each supported field type has a corresponding JSON value property:

• STRING - valueString

• INT32 - valueInt32

• UINT32 - valueUint32

HMP does not restrict the names of the contents of metadata entries. However, it uses several entries to store specific information:

• calypso:recorded_from_session has a STRING field that is the id of the generated session.
• calypso:creator has a STRING field that is the username of the HMP user who created the session or video.
• calypso:creatorDisplayName has a STRING field that is the display name of the HMP user who created the session or video.
• calypso:expiration_timestamp has an INT32 field that contains the time a video should expire and be removed from the system. Time is in seconds since the Unix epoch.
• Metadata elements with the prefix calypso:category: are used to store Category values. Each category can have multiple STRING fields.