This page details the release history of Common Metadata.

Versioning: Number changes (e.g., 1.2 and 2.4) constitute schema changes. Letter changes (2.3c) are documentation-only changes.

Backwards Compatible means that elements were added, but old elements still exist. Therefore, an old XML document with the new namespace will validate.

Version 2.11

This annual release of Common Metadata expands people and character descriptions, expands inclusive language to people’s titles/honorifics, and provides the means to capture trivia and other interesting facts. For technical data, Common Metadata eliminates ambiguities around timecodes, and masks.

Version 2.11 Specification (December 23, 2022)

  • Common Metadata, TR-META-CM, v2.11, December 23, 2022 (PDF)
  • Version showing changes from v2.10 (PDF)

Version 2.11 Schema

A presentation summarizing Common Metadata, MEC, Media Manifest and MMC updates can be found here (PDF)

Annotated Changelist

Along with type corrections, updating links, and other minor fixes, the following changes were made:

  • Basic Metadata
    • Add Ancillary Descriptions which can be used for trivia. These are localizable.
    • Salutations added for People and Character. Salutations specifies titles, honorifics and their correct usage. It also provides the means to specify salutations in a gender-appropriate manner.
    • Added Character description
    • Added People bio
  • Digital Asset Metadata
    • Timecode – Provide clarification around @dropframe (note that Manifest uses the same structure)
    • Added WIP (work in Progress) to AssetIntent-type as additional information regarding the state of an asset
    • Added ChannelMapping/@isSingleTrack to disambiguate channel layouts that involve multiple tracks (e.g., 6 tracks that comprise 5.1), and single tracks (i.e., 5.1 in a single track)
    • Added ActiveWidthPixels@xOffset and ActiveHeightPixels@yOffset to account for asymmetric masks
    • Corrected “AutoSTT” (speech to text) from “AutioTTS”. This change is not backwards compatible.

Version 2.10

This annual update to Common Metadata includes improvements and clarifications. Notable improvements are the inclusion of people pronouns, additional information for regulatory compliance, expanded controlled vocabulary. Subtitle metadata was substantially improved.

Version 2.10 Specification (Decemeber 28, 2021)

  • Common Metadata, TR-META-CM, v2.10, December 28, 2021(PDF)
  • Version showing changes from v2.9 (PDF)

Version 2.10 Schema

A presentation summarizing Common Metadata, MEC, Media Manifest and MMC upddates can be found here (PDF)

Annotated Changelist

  • Basic Metadata
    • Added clarification on use of @languge, Region, and TargetAudience to select the correct LocalizedInfo instance
    • Added ordinal to AssetIntent/SubType for use cases where there might be more than one instance of that subtype (e.g., Final 2).
    • Added 'editorial' AssetIntent Type with "Locked" and "Final" SubType.
    • Support region-specific billing. BillingBlock ordernow has 1..n ordinality and @region attribute.
    • Added Third-Person Singular pronouns to People and Character
    • Added Image (ImageReference) to People and Character
    • Added @interpretation attribute to CountryOfOrigin to resolve ambiguities around this field
    • Added ID scheme controlled vocabulary for C4ID and IMFUG Virtual Fingerprint
    • Added @roleCategory to OrgName-type to provide information about the org. Use case is EU AVMS Directive types of organizations
  • Digital Asset Metadata
    • Added @disposition to language types for all track types that include language. This indicates whether language is assured to be valid (i.e., validated)
    • Added 'lectoring' audio Type
    • Added subtitle Type values for 'samelanguage', 'script', and 'template'.
    • Added Lambda Cap, DLP variants, Excel, SubViewer, and TTML variants as subtitle (timed text) formats
    • Added information about subtitle creation (e.g., whether TTS, segmentation, translation, etc. was manual or automated)
    • Added subtitle characteristics such as reading speed, whether it contains annotations, and timecode offset
    • Changed cardinality of subtitle language to support multiple languages
    • Added subtitle encoding information such as HDR/SDR and expected picture resolution
    • Added support for image sequences (e.g., how to find frame number in filenames)
    • Added SDR-HDR for Image Format (For images that can be used for either SDR or HDR)
    • Added Apple Core Audio Format to container types
  • Types
    • Added RegionUnion-type which is the equivalent of Region/country + Region/countryRegion. This allows region to be specified as an attribute
    • Added md:Timecode-type as equivalent to manifest:md-Timecode

Version 2.9

This release adds features requested by implementers to suppor a broader range of use cases. This includes controlled vocabulary for codecs and file formats as well additional data types.

Version 2.9 Specification (December 8, 2020)

  • Common Metadata, TR-META-CM, v2.9, December 8, 2020 (PDF)
  • Version showing changes from v2.8 (PDF)

Version 2.9 Schema

A presentation summarizing Common Metadata, MEC, Media Manifest and MMC upddates can be found here (PDF)

Backwards Compatible

Annotated Changelist

  • Basic Metadata
    • Supplemented and cleaned up parent relationship enumerations
    • Supplemented relationship types (IsRelatedTo) to include parent types (e.g., isderivedfrom)
    • Added @original to AspectRatio
    • Added @primary to relationships
    • Addec ExcludedRegion to LocalizedInfo
  • Digital Asset Metadata
    • Audio codecs and containers: added BWF, ADM and various Dolby Atmos formats
    • Added ‘LPR’, ‘PSD’, ‘OpenEXR’ and ‘DPX’ file types
    • Added EBU Timed Text (EBU-TT-D)
    • Corrected MIME encoding (removed leading slash (‘/’)
    • Added CardsetLists to Inventory/Image
    • Added SMPTE multichannel audio (MCA) Labeling (see ST 377-4 and ST 377-41)
    • Added @original to Video/Picture/AspectRatio
    • Added Asset Intent type. Added AssetIntent to each asset type and to ContainerMetadata

Best Practices

In conjunction with this release, Best Practices were published for

Image Delivery

This practice provides several mechanisms for delivering images without delivering a full MEC and MMC. It is primarily focused on metadata images, but also provides guidance for other images (e.g., cards delivered as images)

  • Image Delivery, Options for image file delivery, BP-MDDF-IMGDEL, December 8, 2020 (PDF)

Cards (dub, rating, anti-piracy, heath, etc.)

This practice defines how to encode cards, such as anti-piracy cards, rating cards, health cards and dub cards.

  • Cards: Encoding Best Practice, December 8, 2020 (PDF)

Selective Display of Teaser Bonus Content

This practice defines how to selectively show content based on @condition. For example, how to indicate what content is ‘locked’ content in a pre-sale experience.

  • Selective Display of Teaser Bonus Content, December 8, 2020 (PDF)

Version 2.8

This release adds new features as well as a variety of new types that are used across other specifications, espeically the new Asset Ordering and Delivery specifications.

A presentation summarizing Common Metadata, MEC, Media Manifest and MMC upddates can be found here (PDF)

Version 2.8 Specification (December 14, 2019)

  • Common Metadata, TR-META-CM, v2.8, December 14, 2019 (PDF)
  • Version showing changes from v2.7 (PDF)

Version 2.8 Schema

Backwards Compatible

Annotated Changelist

  • General
    • Added Compatibility for improved validation
    • Added Terms-type (same as avails:Terms-type) so it can be used in Manifest, Delivery, etc.
    • Added EIDRURN-type. Used in Delivery, and possibly elsewhere.
    • Added departmentID to OrgName to more precisely identify source within organization
  • Basic Metadata
    • Added ability to target LocalizedInfo to an Audience
    • Added version intent (why this version was created)
    • Ratings: Added ability to apply rating Value to Reasons (Reason/@value), added ability to localize logos and descriptions
    • Added ‘md’ as an identifier scheme for use in ContentIdentifier-type
    • Added ReleaseType ‘FOD’ and ‘local’
    • Mentioned MESA Language Metadata Table (LMT) in Language Encoding
    • Added note that PrimarySpokenLanguage could be a sign language.
    • Added WorkType values for ‘printed’ works (books, comics, etc.)
    • Expanded Related-to structure (content related to…)
  • Digital Asset Metadata
    • Added @value to Rating Reason.
    • Added ProRes 4444 XQ and ProRes 4444 codecs
    • Removed duplicate “ITT” timed text type
    • Added “IAB” codec for SMPTE ST 2098-2 Immersive Audio Bitstream
    • Added “Silent” audio Type
    • Added container types
    • Added singalong subtitle Type
    • Added instructions for URI encoding of Genre @id
    • Added SubType to video, subtitle and image. Increased cardinality to 0..n in audio.
    • Changed xs:integer Inventory terms that cannot be zero to xs:nonNegativeInteger

Best Practices

In conjunction with this release, Best Practices were published for

  • Encoding Audivisual Type and Subtype, especially for Bonus material, December 12, 2019 (PDF)

Version 2.7, 2.7.1

This release adds substantial new features to Common Metadata, including support for franchises/brands/universes, related works, more sophisticated TV internationalization, and technical metadata improvements (e.g., dynamic metadata, and additional encoding parameters). General updates such as new codec controlled vocabularies, minor corrections, and clarifications (e.g., CountryOfOrigin) are included. This is one of the most substantial Common Metadata updates.

Version 2.7 Specification (November 1, 2018)

  • Common Metadata, TR-META-CM, v2.7, November 1, 2018 (PDF)
  • Version showing changes from v2.6 (PDF)

Version 2.7.1 Schema -- corrects string-DisplayIndicators to remove enumerations

Version 2.7 Schema

Backwards Compatible

Annotated Changelist

This presentation contains notes of changes (PDF).

  • Basic Metadata
    • Add WorkType values to cover other media and non-media objects that can be described using Common Metadata.
    • Allowed Card Types as WorkTypes.
    • Added ‘Production’ as a ReleaseType to capture date of production. Addded ‘Festival’ ReleaseType.
    • Changed cardinality of CountryOfOrigin to 0..n to accommodate titles with multiple countries of origin. Provided improved definitions of CountryOfOrigin.
    • Clarified definition of LocalizedInfo/@Region.
    • People
      • Added Job/CharacterInfo for character name localization, character identifiers and whether character is nonfictional.
      • Added @topBilled to BillingBlockOrder to indicate talent is top-billed.
      • Improved gender structure and encoding (Gender-type)
    • Improved content relationships to better support season reordering, related content (e.g., based on book), franchise/brand/universe, and content grouping.
      • Added SequenceInfo, Region and ExcludedRegion to Parent to support alternate ordering for distinct parents (e.g., regional episode ordering).
      • Added ContentRelatedTo to reflect basing a work on something like a work (e.g., book), event or person. Includes GroupingEntity to Basic; used for Franchise, Brand and Universe (via separate Best Practice)
      • Added ‘isbasedon’ and ‘isdescendentof’ relationships
      • Added AltGroupIdentifier to GroupingEntity-type to allow more robust cross referencing.
    • Changed cardinality of WorkTypeDetail from 0..1 to 0..n
  • Digital Asset Metadata
    • Added Compliance-type and Compliance elements to each track definition.
    • Added BitDepth to Video/Picture
    • Added CodecProfile to Video/Encoding
    • Defined default for Video/SubtitelLanguage/@closed as ‘false’ (i.e. open captions)
    • Added Picture/ColorTransformMetadata for dynamic metadata (e.g., DV, HDR10+, SD-HDR1).
    • Added new video picture encoding controlled vocabulary
    • Added ‘noforced’ as a Type for subtitles
    • Added Health notice as a Card Type.
    • Added codec controlled vocabulary and references
    • Updated color mastering vocabulary.

Best Practices

In conjunction with this release, Best Practices were published for

  • Special WorkType values (PDF)
  • Color Encoding

Version 2.6

This release is evolutionary, adding new enumerations, deprecating strings that are too short to be useful and adding technical information. The most substantial changes support more advanced supply chain use cases.

Backwards Compatible

Annotated Changelist

General Types

  • Clarified EIDR-X extension acceptable characters. Former wording unnecessarly constrained encoding and prohibited characters in common use 9e.g., ":").
  • Added EIDR-URN ID scheme -- RFC 7972 provides a method for encoding EIDR as a URN
  • Added Scope and @subscope to ContentIdentifier-type -- Provides additional context for identifiers. Primary use case is to differentiate EIDR Edits from EIDR Abstractions. Previously, they both encode as EIDR and you would have to go to the EIDR database to differentiate.


  • Added Workflow-attr attribute group -- This is bookkeeping that ensures the existing workflow pattern is consistent across various objects. These parameters support update workflows and workflow QC.
  • Added support for UN M49 area codes -- Provides more flexibiltiy of referencing regions.

Basic Metadata

  • Made TitleSort and Sumary190 optional -- These fields are not required in some workflows, but were required by the schema. Provides a path for deprecating Summary190 which is too short to be useful in most cases.
  • Added 'AVOD' and 'PVOD' release types
  • Added @condition to LocalizedInfo to support windowed metadata -- Allows connection from Avail to metadata in the same manner as ALIDExperienceMap/ExperienceID/@condition

Digital Asset Metadata

  • Added Atmos to codecs -- Added Atmos over DD+ and TrueHD to Audio Codec Added Drop Frame indication in subtitles -- Handles special timing case in subtitles.Added Loudness to audio encoding
  • Added information about video before encoding (cadence)
  • Added to Audio support for SMPTE S 377-4 MCA Audio Content Kind and MCA Audio Element Kind

Version 2.5

This version adds support for Immersive video including VARM (Virtual, Augmented and Mixed Reality) and 360 Video; improves image and interactive Digital Asset data; and includes numerous changes to support supply chain use cases.

Backwards Compatible

Annotated Changelist

Added support for VR, AR, MR and 360 video and audio types. This includes changes throughout (WorkType, Video, Audio, Interactive, etc.)

Basic Metadata

  • Clarified EIDR-X extension acceptable characters. Former wording unnecessarly constrained encoding and prohibited characters in common use 9e.g., ":").
  • Expanded WorkType definitions for other media. Supports, VARM, games, apps, CPE , etc.
  • Added ArtReference/@purpose. This is used to select the appropriate image for a particular use rather than just relying on resolution.
  • Added 360 and Multiview to ThreeD (3D). Allows signaling of 360 video. Multiview indicates multiple sychronized videos. 360 with multieview is sometimes called 'teleporting'.
  • Added ‘no-audio’ WorkTypeSub to indicate silent film with no audio. This is used in MMC to signal that the work truly has no associated audio (i.e., don't fail QC for missing audio).
  • Allow multiple DistrTerritory in ReleaseHistory. Saves having to repeat the whole record when the same party distributes in multiple territories.
  • Added @role to Release org in Release history. When ambiguos indicates role of mentioned party.

Digtal Asset Metadata

  • Audio
    • Added Ambisonics and Quad Binaural. Part of VARM/360 support.
    • Added @forced boolean to indicate forced narrative on dubs. This is used in MMC to signal that there is no forced subtitle track (i.e., what would be in forced subtitles is included in audio). This typicaly used when some languages have forced subs and others do not (i.e., don't fail QC for missing forced subs).
    • Allow multiple instances of Language. Required for tracks without a dominant language (e..g, Babel)
    • Add SubType and People to audio track for better descriptions of commentaries. Provides better information for commentary track selection (i.e., whose commentary).
  • Video
    • Added CaptureMethod (e.g., live action vs. animation). This is specifically designed to provide information to optimize encoders for video type. Also, this can be interesting to a consumer.
  • Subtitle
    • Added FormatType enumerations for TTML variants (e.g., IMSC1). Needed to distinguish formats.
  • Image
    • Added Description, Type, Purpose, HDR information and VR thumbnail information. General improvements to image description. VARM/360 support.
  • Interactive
    • Added SubType and Encoding/EnvironmentAttribute to better describe expected playback environment (useful for apps and VR). Environment attributes are anything else needed to play (for example, wand controllers). This information is used to determine if playback environment is sufficient.

Version 2.4

This release adds a variety of small features to support specific Cross-Platform Extras and Media Manifest Core use cases.

Backwards Compatible


  • Changed DigitalAssetVideoData/Picture cardinality to 0..1 to support variant tracks without a picture
  • Added Language to Video to capture language of text that appears onscreen.
  • Corrected use of ‘none’ in Color Differencing
  • Changed cardinality of Language in image to 1..n (could be multiple languages in an image)
  • Added Language to Card, particularly to support Dub cards.
  • Added Application type “Image” and RuntimeEnvironment ‘Default’
  • Added ‘Other’ WorkType.

Version 2.3

This release adds additional support for Next Generation Video and Audio.

Backwards Compatible


  • Minor text corrections.
  • Basic Metadata
    • Added ‘licensor’ as AssociateOrg-type/@role. This is generally used only for Avails.
    • To Hash-type added CRC enumerations and noted that Hash-type can be used for both cryptographic hash and error detection/correction code.
    • Deprecated CableLabs genres (no longer posted)
    • Made CompObj-type/Entry optional to support reference to complications whose entries are unknown. This is required for EIDR and Avails.
  • Digital Asset Metadata
    • Added Ancillary tracks to support tracks that enhance other tracks, such as Dolby Vision and MPEG Sample Variants
    • Added HDR metadata, in particular the ability to carry:
      • MaxFALL and MaxCLL
      • SDRDownconversion (‘prohibited’)
    • Added UHDImage flag in subtitle
    • Added ‘MPEG-H’ codec enumeration


  • Added VBR and BitRateAverage to video encoding (has been in schema since v2.0)


  • Added WhitePointChromaticity to spec (was correct in schema).
  • Added ‘App’ and ‘Gallery’ enumerations for WorkType
  • Clarified enumerations of SDRDownConversion
  • Clarified ‘cardset’ language.
  • Added DTS:X codec.


  • Corrected cardinality on Image Language and Cardset Description.

Version 2.2

This release adds new codecs and metadata for Next Generation Video data.

Backwards Compatible


  • Added ‘enhancement’ video Type encoding.
  • Added AVC Dolby Vision, HEVC Dolby Vision, AC-4
  • Under DigitalAssetVideoPicture-type added MasterColorVolume and ColorEncoding.

Version 2.1

This version refines many of the concepts introducted in version 2.0. Note that letter releases are documentation-only.

Backwards Compatible


Basic Metadata

  • Made DisplayName optional in OrgName-type
  • Added @domain to numbers and sequences within ContentSequenceInfo-type

Digital Asset

  • Corrected text to match schema for DigitalAssetAudioEncoding-type
  • Added additional channel mappings
  • Added H.265 as a CODEC (for HEVC/H.265)
  • Added suggested vocabulary for Video MPEG Profile and Level
  • DigitalAssetVideoPicture-type
    • Corrected schema to reflect that @multiplier is optional
    • Corrected timecode text to match schema as optional
  • Added @guaranteedAbsent to DigitalAssetWatermark-type


  • Added ContainerReferene and ContainerIdentifier to ContainerMetadata-type


  • Reference added in conjunction with other changes\
  • Clarified MIME encoding
  • Improved redefine flexibility (most schema changes are these and do not change encoding)
    • Additional redefine types
    • AsssociatedOrg-type


  • Fixed DigitalAssetVideoEncoding/ActualLength from 0..n to 0..1. It is correct in the schema. Corrected Ratings reference to correct URL.
  • Minor text corrections. References added to new Common Metadata Ratings to avoid duplication. Addition of VP9 codec.

Version 2.0

Based on ongoing experience with Common Metadata, this major updated added many new elements. Types were added to support EIDR. Note that despite the large number of additions, existing elements were preserved to support backwards compatibility.

Backwards Compatible


Basic Metadata

  • Added detailed WorkType in parallel with WorkType
  • TitleDisplay19 optional
  • OriginalTitle optional
  • Added back missing "AspectRatio" (optional this time). Note that FitToActivePixels was not replaced because it is redundant with PictureFormat
  • Added OriginalLanguage
  • Added VersionLanguage
    • Enhanced SequencInfo
    • Created ContentNumber-type (text + @domain)
    • Added DistributionNumber and AlternateNumber of ContentNumber-type
    • Defined HouseSequence in terms of ContentNumber-type, allowing domain (namespace) to be specified.


  • Added CompilationClass
  • Change term ‘Composite’ to ‘Compilation’ to avoid EIDR conflict. (text only)
  • Added any##other to CompObj-type to allow for EIDR to define ExternalID reference.
  • Added EntryNumber to CompObj-type
  • Fixed schema to have multiple instances of DisplayName (for multiple languages)
  • Added ChildEntryClass

Digital Asset

  • Added Video/SignedLanguage
  • Added Video/Cardset
  • Added optional scanOrder to DigitalAssetVideoPicture-type ('BFF', 'TFF' or 'PPF')
  • Added PictureFormat to DigitalAssetVideoData-type
  • DigitalAssetVideoData-type/SubtitleLanguage --> unbounded
  • Added Video Picture FrameRate/@timecode
  • Added Audio/Encoding/BitrateAverage
  • Added Audio/Encoding/VBR
  • Added Audio/Encoding/ChannelMapping
  • Added Video/Encoding/BitrateAverage
  • Added Video/Encoding/VBR
  • Added Picture/ColorSampling
  • Added Picture/Colorimetry
  • Added Subtitle/Encoding and Interactive/Encoding as xs:anyType
  • Added Image/Language (0..n). This allows selection between multiple images associated with particular languages.
  • Changed the following to optional: Audio/Channels, Video/ColorType, Picture/AspectRatio, Subtitle/Format, Interactive/Language
  • Interactive: Redone
  • Added ‘Private’ any##other data to Audio, Video, subtitle, Image and Interative Watermark
    • Added DigitalAssetWatermark-type
    • Added Audio/Encoding/Watermark
    • Added Video/Encoding/Watermark
  • Added ID to Audio, Video, Subtitle, Interactive, Image DigitalAssetMetadata items (after TrackReference)
  • Added DigitalAssetTrackList-type
  • Added any##other to Video/Picture, Video/Encoding, Audio/Encoding


  • Allow multiple instances of ContainerSpecificMetadata
  • Add to OrgNameType: AlternateName and@ idType
  • Added Grouping Entity (from EMA Metadata)
  • Added DisplayCredit (from EMA Metadata)


  • Added elements to Container-type xs:redefine simple types
  • One for languages
  • One for each string type that is subject to redefine.

Version 1.2

The 1.2 specifications contain a large number of small corrections resulting from implementation experience. There is only one 1.2 schema--all other changes were documentation-only. Moved ratings to Common Ratings.

  • Version 1.2f Specification
    • Common Metadata, TR-META-CM, v1.2f, October 25, 2012 (PDF)
    • Versions showing changes from v1.2e (PDF) [The only change is moving ratings to a separate document Common Metadata Content Ratings, TR-META-CR found at]
  • Version 1.2 Schema
  • Prior document versions of 1.2 - no schema changes
    • Version 1.2e Specification
      • Common Metadata, TR-META-CM, v1.2e, October 25, 2012 (PDF)
      • Versions showing changes from v1.2a (PDF), from 1.2d (PDF)
      Version 1.2d Specification (replaced by 1.2e)
      • Common Metadata, TR-META-CM, v1.2d, September 24, 2012 (PDF)
      • Version showing changes from v1.2a (PDF)
    • Version1.2a Specification (replaced by 1.2d)
      • Common Metadata, TR-META-CM, v1.2a, May 29, 2012 (PDF)
      • Version showing changes from v1.2 (PDF)
    • Version 1.2 Specification (replaced by 1.2a)
      • Common Metadata, TR-META-CM, v1.2, November 1, 2011 (PDF)
      • Version showing changes from v1.1 (PDF)

Backwards Compatible



  • Incorporates corrections and enhancements, primarily to support derived specifications.


  • Editorial correction to image column and width references. No schema change.
  • Added type description for ID types already in schema.
  • Added ‘DTS-EXPRESS’ to audio Codec.

1.2d (b and c not released)

  • Correct spec to align with schema:
    • PrimaryLanguage, PrimarySpokenLanguage,
    • Remove AspectRatio which was never implemented in schema. May be added later.
    • Remove FitToActivePixels which was never implemented in schema.
  • EIDR
    • • Added reference to EIDR.
      • Added EIDR-S ID scheme.
  • Ratings
    • Corrections and clarifications for ratings in Ireland.
    • Comments on Venezuela
    • Added “Explicit Content” to RIAA rating
  • Other
    • Added ‘Easy Reader’ subtitle Type.
    • Added ‘editor’, ‘post-production’ and ‘encoding’ to AssociatedOrg enumerations
    • Fixed APID examples.
    • Minor editorial text corrections.


  • Ratings:
    • Separated out BBFCT for theatrical BBFC.
    • Added “E” to BBFC for Exempt content.
    • Added Canada/CHVRS.
    • Added ratings to indicate unrated in a given region.
    • Added ‘exempt’ as a rating condition.
  • To match schema
    • changed cardinality of CountryOfOrigin to optional
    • change cardinality of BasicMetadataInfo-type/Region to optional


  • Moved Section 8 Content Ratings Encoding to a separate document: TR-META-CR, Common Metadata Content Ratings,

Version 1.1

Improved codec support. Corrections.

Backwards Compatible

Version 1.0

First release of Common Metadata


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