MAWG	Relation	OGG	How to do the mapping	Datatype	XPath	Tested
Descriptive Properties (Core Set)
Identification
identifier	exact	Name	Name field in skeleton header (new)	String	N/A
Content description
description	related	Title	Title field in skeleton header (new)	String	N/A
Technical Properties
frameSize	N/A at container level
compression	exact	Content-type	Content-type field of Skeleton header	MIME type	N/A
duration	exact		calculate as duration = last_sample_time - first_sample_time of OggIndex header of skeleton	Float (or rather: rational - rational)	N/A
format	exact	Content-type	Content-type field of Skeleton header	MIME type	N/A
samplingRate	exact		calculate as granulerate = granulerate_numerator / granulerate_denominator of Skeleton header	Rational (or rather int / int)	N/A
frameRate	exact		calculate as granulerate = granulerate_numerator / granulerate_denominator of Skeleton header	Rational (or rather int / int)	N/A
averageBitRate	exact		calculate as bitrate = length_of_segment / duration from OggIndex headers of skeleton	Float	N/A
numTracks	N/A on container level