MAWG	Relation	WebM properties	How to do the mapping	Datatype	XPath	RDF tested
Descriptive Properties (Core Set)
Identification
identifier	exact	TrackUID	A unique ID to identify the Track.	Unsigned Integer	N/A	Yes
	exact	diverse Tags (from Matroska, undecided support in WebM)	Pick one of ISRC (International Standard Recording Code), MCDI (CDROM TOC), ISBN (International Standard Book Number), BARCODE (EAN-13 (European Article Numbering) or UPC-A (Universal Product Code)), CATALOG_NUMBER (label-specific), LABEL_CODE (4-digit or 5-digit number to identify the record label), LCCN (Library of Congress Control Number)	String	N/A	No
	related	SegmentFilename (from Matroska, undecided support in WebM)	SegmentFilename field in Segment information as a filename corresponding to this segment	String	N/A	No
title	exact	Title (from Matroska, undecided support in WebM)	Title field in Segment information as a general name of the segment	String	N/A	Yes
	exact	diverse Tags (from Matroska, undecided support in WebM)	TITLE (akin to the TIT2 tag in ID3), SUBTITLE (subtitle text)	String	N/A	No
language	exact	Language	Specifies the language of the track in the Matroska languages form	language code	N/A	Yes
	related	ChapLanguage (from Matroska, undecided support in WebM)	The languages corresponding to the string, in the bibliographic ISO-639-2 form	language code	N/A	No
	related	TagLanguage (from Matroska, undecided support in WebM)	Specifies the language of the tag specified, in the Matroska languages form	language code	N/A	No
locator	exact		file URI from system	URI	N/A	Yes
Creation
contributor	exact	diverse Tags (from Matroska, undecided support in WebM)	LEAD_PERFORMER, ACCOMPANIMENT (TPE2 tag in ID3), COMPOSER (TCOM tag in ID3), ARRANGER, LYRICIST (TEXT tag in ID3), CONDUCTOR (TPE3 tag in ID3), DIRECTOR (IART tag in RIFF), ASSISTANT_DIRECTOR, DIRECTOR_OF_PHOTOGRAPHY (ICNM tag in Extended RIFF), SOUND_ENGINEER, ART_DIRECTOR, PRODUCTION_DESIGNER, CHOREGRAPHER, COSTUME_DESIGNER, ACTOR, CHARACTER, WRITTEN_BY, SCREENPLAY_BY, EDITED_BY (IEDT tag in Extended RIFF), PRODUCER (IPRO tag in Extended RIFF), COPRODUCER, EXECUTIVE_PRODUCER, DISTRIBUTED_BY (IDST tag in Extended RIFF), MASTERED_BY, ENCODED_BY (TENC tag in ID3), MIXED_BY, REMIXED_BY (TPE4 tag in ID3), PRODUCTION_STUDIO (ISTD tag in Extended RIFF), THANKS_TO, PUBLISHER (TPUB tag in ID3)	String	N/A	No
creator	exact	diverse Tags (from Matroska, undecided support in WebM)	ARTIST (akin to the TPE1 tag in ID3), LABEL (record label)	String	N/A	No
date	exact	DateUTC	Date of the origin of timecode (value 0), i.e. production date	Date	N/A	No
	related	diverse Tags (from Matroska, undecided support in WebM)	DATE_RELEASED (TDRL tag in ID3), DATE_RECORDED (TDRC tag in ID3), DATE_ENCODED (TDEN tag in ID3), DATE_TAGGED (TDTG tag in ID3), DATE_DIGITIZED (IDIT tag in RIFF), DATE_WRITTEN, DATE_PURCHASED	String	N/A	No
location	exact	diverse Tags (from Matroska, undecided support in WebM)	RECORDING_LOCATION / COMPOSITION_LOCATION (The countries corresponding to the string, same 2 octets as in Internet domains, or possibly ISO-3166. This code is followed by a comma, then more detailed information such as state/province, another comma, and then city.), COMPOSER_NATIONALITY (The countries corresponding to the string, same 2 octets as in Internet domains, or possibly ISO-3166.)	String	N/A	No
Content description
description	exact	Name	Name field in Tracks Element as a human readable track name	String	N/A	No
	exact	diverse Tags (from Matroska, undecided support in WebM)	SUBJECT, DESCRIPTION, SUMMARY, SYNOPSIS, COMMENT	String	N/A	No
keyword	exact	diverse Tags (from Matroska, undecided support in WebM)	KEYWORDS (separated by a comma), INITIAL_KEY (initial key that a musical track starts in), ORIGINAL_MEDIA_TYPE (TMED tag in ID3), CONTENT_TYPE	String	N/A	No
genre	exact	diverse Tags (from Matroska, undecided support in WebM)	GENRE (TCON tag in ID3), MOOD (TMOO tag in ID3)	String	N/A	No
rating	exact	diverse Tags (from Matroska, undecided support in WebM)	LAW_RATING (Depending on the country it's the format of the rating of a movie (P, R, X in the USA, an age in other countries or a URI defining a logo)), ICRA (content rating for parental control, previously RSACi), RATING (how much a person likes the song/movie. The number is between 0 and 5 with decimal values possible (e.g. 2.7))	String	N/A	No
Relational
relation	exact	TargetTypeValue (from Matroska, undecided support in WebM)	SEASON / SEQUEL / EDITION / ISSUE / VOLUME / OPUS, MOVIE / EPISODE / ALBUM / OPERA / CONCERT, PART / SESSION, CHAPTER / TRACK / SONG, SUBTRACK / PART / MOVEMENT / SCENE, SHOT	String	N/A	No
collection	exact	ChapterPhysicalEquiv (from Matroska, undecided support in WebM)	SET / PACKAGE, CD / 12" / 10" / 7" / TAPE / MINIDISC / DAT / DVD / VHS / LASERDISC, SIDE, LAYER, SESSION, TRACK, INDEX	String	N/A	No
Distribution
publisher	exact	diverse Tags (from Matroska, undecided support in WebM)	PUBLISHER (TPUB tag in ID3)	String	N/A	No
targetAudience	related	diverse Tags (from Matroska, undecided support in WebM)	CONTENT_TYPE (the type of the item. e.g. Documentary, Feature Film, Cartoon, Music Video, Music, Sound FX, ...), PERIOD (the period that the piece is from or about)	String	N/A	No
Fragments
fragments	exact	Cues	Seek table provided through the following fields: Cues (top-level element to speed seeking access), CuePoint (seek point), CueTime (Absolute timecode according to the segment time base), CueTrackPositions (positions for different tracks corresponding to the timecode)	String	N/A	Yes
namedFragments	exact	Chapter	identified by ChapterUID (uint), ChapterTimeStart (start timecode), ChapterTimeEnd (end timecode), ChapString (chapter name), ChapLanguage (language used in chapter name)	String	N/A	Yes
Technical Properties
frameSize	exact	DisplayWidth x DisplayHeight (in pixels)	width: DisplayWidth, height: DisplayHeight; also note the pixel cropping for HDTV defined by PixelCropBottom, PixelCropTop, PixelCropLeft, PixelCropRight	unsigned integer x unsigned integer	N/A	Yes
compression	exact	CodecID field	fixed to "VP8" for video and "Vorbis" for audio	String constant (V_VP8, A_VORBIS)	N/A	Yes
duration	exact	Duration	use TimecodeScale field to identify resolution of Duration field (Timecode scale in nanoseconds, e.g. 1.000.000 means all timecodes in the segment are expressed in milliseconds), which provides segment duration (typically a Matroska file is composed of 1 segment)	Float	N/A	Yes
format	exact	CodecID field	fixed to "VP8" for video and "Vorbis" for audio	String constant (V_VP8, A_VORBIS)	N/A	Yes
samplingRate	exact	SamplingFrequency	Value of SamplingFrequency field (in Hz)	float	N/A	Yes
frameRate	exact	FrameRate	Value of FrameRate field (informational only, since frames are timestamped)	float	N/A	Yes
averageBitRate	exact		calculate as bitrate = length_of_file / duration on system	float	N/A	Yes
numTracks	exact	max TrackNumber	maximum value on all TrackNumber field values in the Tracks field	unsigned integer	N/A	Yes