Library Fields

Media Center helps you manage, organize and view your files by maintaining a collection of properties on a per-file basis. Each file managed by Media Center belongs to a particular media type (eg. audio, video, image), and each media type has a predefined set of properties available and valid for use.

Examples of file properties are Artist, Album and Genre for audio files, Actor, Director, and Aspect Ratio for movies, and Width, Height and Focal Length for images.

Initially, a file's properties are imported when the file is imported, or created when the file is created by Media Center (e.g. when ripping a CD or DVD). Typically, this data comes from a file's internal metadata (commonly referred to as tags), or is looked up from external databases. In addition, several library tools are available to assist in creating or modifying properties and tags.

Media Center can also save a file's properties to the internal metadata within the physical file itself. These tags are then available for use by other programs that support the specific file types. The tags supported by a given file type are file type-specific, but there is often commonality or overlap in various media or file formats. Media Center helps manage this by automatically mapping essentially similar tags with different names into a standard set of properties.

In addition, Media Center allows creation of an almost limitless number of custom (or user) properties. This allows for managing information about files that is not predefined by Media Center or by a given format's standard tags. These custom properties may also be saved to a file's tags, should the format support user-defined or extensible tags.

Saving file properties to the physical file allows tags to be re-imported by Media Center, and used by other programs on a variety of systems. While typical metadata consumes a trivial amount of extra disk storage (relative to the file's size), larger metadata such as cover art, lyrics or extensive notes may be more noticeable, especially when files are exported to smaller devices such as handhelds. See Save File Properties in Disk Files for more information.

The Media Center Predefined Fields table below shows the stock default properties available in Media Center. File properties are listed and managed under:

Tools > Options... > Library & Folders > Manage Library Fields...

Note here that properties are called fields. This is primarily a technical and pedantic distinction. The terms properties, fields, and tags become synonymous in common language, but do nonetheless maintain distinct meanings. It might help to think of a spreadsheet, where column headers are fields, rows are files, and a row of individual cell values are the file's properties. If each row were saved to an external file, the row's cells would be called tags.

As briefly mentioned above, properties help manage and organize related files. They can also be searched. In all of these, either directly or indirectly, one or more library fields is used in the construction.

When used in expressions or searches, a field is expressed by surrounding its name with square brackets. For example, Album Artist is written and used as [Album Artist]. Field names are case-insensitive, meaning there is no distinction between upper- or lower-case letters. They are typically written in camel-case to help make them more distinguishable, especially in complex expressions.

Field Specifications

Fields in Media Center have several defined characteristics. These are shown in the annotated example Manage Library Fields dialog.

Each field:

1. Has a standard, unchangeable Name
2. Has a Display name and its pluralized version used in throughout the user interface (pluralized version not currently shown in the Media Center Predefined Fields table below)
3. Has Flags indicating the field's applicability to the indicated media / file types: Audio, Image, Video, Data, TV
4. Is either User data, or is automatically Calculated data via Expression
5. Stores a particular Data Type (see Field Data Types)
6. May be a Relational field, and if so, its related field
7. Has rules about its Edit Type or editability (see Field Edit Types)
8. May have a semicolon-separated list of Acceptable Values (Note: no spaces after the semicolons)
9. May be Save in file tags (when possible). Note: was labeled "Stored ..." prior to 16.0.154.
10. May have one or more Search keywords used in queries as abbreviated or alternate names
11. May be a Default search field when performing search queries (see Note: Default Search Field)
12. May be hidden from normal view/usage (these field names are shown in italics in the Predefined Fields table below)

Field Data Types Data Type Description String An unformatted sequence of characters. Integer A whole number (no decimal portion). Decimal A floating point number. Percentage A decimal from 0 to 1 indicating 0% to 100%. List A semicolon-separated list of strings. Date A complex type that is either date-only, or date and time. (TBD: need refs) Unknown An unspecific catch-all type, not specifically defined.

Field Edit Types Edit Type Description Standard A free-format, editable field. Clear-only A clear-only field, whose value is set or updated by Media Center. Large Value A free-format, editable field, used for large data (e.g. lyrics, notes, descriptions). (TBD: recommended for data larger than XXX characters). Cannot be edited A non-editable field. Filename A file-path specification field. Five stars A selectable, 5-star graphical field, typically used for ratings. DVD video info TBD (currently used only for hidden field DVD Video Info). List List fields will use standard edit or list edit (i.e. check box) style. Calculated, Editable A calculated, editable field, whose initial value is automatically set. Calculated, Not editable A calculated, non-editable field whose value is automatically set.

Predefined Fields

Overview

The table below lists Media Center's default fields. The rows list the available fields, and the columns indicate how the field is defined, and gives a brief explanation of the fields usage or meaning. Where applicable, additional links and field-specific information is also listed. The value for some fields is calculated by Media Center. When possible, the expression used to derive this value is also shown. In some cases, this value may be modified. Beneath a field name is a list of the default Search Keyword(s), if available, which are used for field-specific searching within Media Center.

The Save column indicates if the field is saved in file tags (prior to version 16.0.154, Media Center used the term Stored in the Manage Library Fields dialog). The Search column indicates if the field should be searched when using Media Center's Search area.

Note: Default Search Field. Beginning with MC17, the Default search field setting is not used for stock fields; instead searching fields relies on rules built into the program. Nearly all stock fields are now searched by default. User-defined fields will honor this setting.

Note: Legacy Fields. Some fields are legacy fields, possibly created during an upgrade from a previous version of Media Center. These are noted as "Legacy:" in the Description column. Your Library may not contain these fields.

Note: Some fields are used internally by Media Center to maintain state information, and are not viewable in panes, categories, or the Tag Action Window. These are typically configured through various options and settings dialogs.

Fields

Media Center Predefined Fields

Field Name  search keyword(s)	Media Types	S  a v e	S  e a r c h	Data Type Edit Type Relational	Description
A - C  Access Rating  accessrating=	Audio Image Video Data TV	✓		String Standard	Specifies the access rating when access control is in effect. See also: Access Control
Actors  actors=	Audio Video			List List	A semicolon-separated list of a movie's actors.
Album  album=  al=	Audio Image Video Data TV	✓	✓	String Standard	The name of the album.
Album Artist  albumartist=	Audio	✓		String Standard	Designates the artist to use for compilation albums. See also: Album Artist and Album Artist (Auto)
Album Artist (auto)  autoalbumartist=	Audio			String Calculated, Editable	Automatically calculated based on the contents of an album's Artist tracks. Expression: AlbumArtist() See also: Album Artist and Album Artist (Auto)
Album Gain  albumgain=  ag=	Audio			Decimal Clear-only	Automatically calculated gain for an album, based on Replay Gain. Obsolete in MC19. See also: Album Gain
Album Type  albumtype=	Audio			String Calculated, Not editable	Automatically calculated value indicating if the album has a single artist or multiple artists, and if the album is complete. Expression: AlbumType() See also: Multiple Artist Albums#Complete Albums
Altitude	Image			String Standard	Camera's GPS altitude when photo was taken. See also: Photo Tagging
Aperture	Image			String Not editable	Camera's aperture setting used to create the photo. See also: Photo Tagging
Artist  artist=  ar=	Audio Image Video Data TV	✓	✓	List Standard	Track artist, or movie's director. See also: Album Artist and Album Artist (Auto), YADB
Artist - Album (Year)	Audio			String Calculated, Not editable	Automatically calculated field used for album grouping. Expression: Clean([Artist] - [Album] /([FormatDate([Date, 0), Year)/))
Aspect Ratio  aspect=	Video			String Standard	Video aspect ratio.
Audio Analysis Info	Audio			String Not editable	Automatically calculated data created and used by audio analysis engine. See also: Audio Settings and Analysis, Analyze Audio
Author	Audio Data			List List	A semicolon-separated list of a document's authors.
Band  band=  bd=	Audio	✓	✓	String Standard	Designates a track's band.
Bios  bios=  bio=	Audio	✓		String Large	Legacy: Musicmatch musician or group biography.
Bit Depth  bitrate=	Audio Video			Integer Not editable	Audio / video bit depth.
Bitrate	Audio Video		✓	Integer Not editable	Audio / video bitrate, in bits per second (bps).
Bookmark	Audio Video			String Clear-only	Specifies the bookmark location for resumption of playback. See also: Bookmarking
BPM  bpm=	Audio	✓		Integer Standard	Beats-per-minute, calculated automatically during audio analysis.
Budget	Video			String Standard	A movie's financial budget.
Camera	Image		✓	String Standard	Camera EXIF tag. See also: Photo Tagging
Caption  caption=	Image	✓	✓	String Standard	An image's caption.
Catalog #	Audio Image Video Data TV	✓		String Standard	***TBD***
Category Image Category	Image			String Not editable	***TBD***
Channels	Audio Video			Integer Not editable	Number of playback channels
Cinematographer	Video			List List	A semicolon-separated list of a movie's cinematographer(s).
Comment  comment=  c=	Audio Image Video Data TV	✓	✓	String Standard	A general use comment field.
Complete Album  completealbum=	Audio			Integer Not editable	Indicates if an album is a complete album. See also: Multiple Artist Albums#Complete Albums
Composer  composer=	Audio	✓	✓	List Standard	The composer of a piece or work, typically used with classical music.
Compression	Audio Video			String Not editable	The compression type and scheme used for compressed audio/video.
Conductor  conductor=	Audio	✓		List Standard	The conductor of a piece or work, typically used with classical music.
Copyright  copyright=	Audio Image Video Data TV	✓		String Standard	Media copyright information.
Country  country=	Audio Image Video Data TV			List List	A semicolon-separated list of countries relevant to the media.
Credits  credits=	Video			List List	A semicolon-separated list of movie credits.
Critic Rating	Audio Image Video Data TV			String Standard	Critic Rating, like Rotten Tomato or Allmusic score.
Custom	Audio Image Video Data TV	✓		String Standard	General use custom field.
Custom 1	Audio Image Video Data TV	✓		String Standard	General use custom field (may not exist).
Custom 2	Audio Image Video Data TV	✓		String Standard	General use custom field (may not exist).
Custom 3	Audio Image Video Data TV	✓		String Standard	General use custom field (may not exist).
D - F  Date  date=  d=	Audio Image Video Data TV	✓		Date Standard	General date of media.
Date (day)	Audio Image Video Data TV			Integer Calculated, Editable	Day of month segment of Date. Expression: FormatDate(Day)&DataType=[Integer]
Date (filename friendly)	Audio Image Video Data TV			String Calculated, Not editable	A version of Date that has been cleaned for use in filenames. Expression: FormatDate(Filename)
Date (month)	Audio Image Video Data TV			String Calculated, Editable	Month segment of Date. Expression: FormatDate(Month)&DataType=[Month]
Date (year)  year=	Audio Image Video Data TV			Integer Calculated, Editable	Year segment of Date. Expression: FormatDate(Year)&DataType=[Number] See also: YADB
Date Created	Audio Image Video Data TV			Unknown Not editable	A file's creation date/time as reported by the system.
Date Imported  dateimported=	Audio Image Video Data TV			Unknown Not editable	The date the media was imported into the MC / MJ database. See also: [1]
Date Modified	Audio Image Video Data TV			Unknown Not editable	A file's modification date/time, as reported by the system.
Date Recorded	Video TV	✓		Date Standard	The date/time of a video recording.
Description	Audio Image Video Data TV	✓	✓	String Large	A general description of the media.
Dimensions	Image Video			String Calculated, Not editable	Automatically calculated image/video dimensions. Expression: Clean([Width] x [Height])
Direction	Image			String List	Camera's directional heading when photo was taken. See also: Photo Tagging
Director  director=	Audio Video			List Standard	A semicolon-separated list of a movie's directors.
Disc #	Audio Video	✓	✓	Integer Standard	The disc number, for multi-disc audio or video sets. See also: Multidisc Albums
Distributor	Video			List List	A semicolon-separated list of a movie's distributors.
DLNA Server Info	Audio Image Video Data TV			String Not editable	Internal information for the MC DLNA server.
Duration  length=  duration=	Audio Video			Unknown Not editable	The duration of an audio / video track.
DVD Video Info	Video			String Standard	Internal information used for a DVD.
Dynamic Range (R128)	Audio Video	✓		Integer Clear-only	An automatically calculated value indicating R128 Dynamic Range (overall dynamic range). See also: [2]
Dynamic Range (DR)	Audio Video	✓		Integer Clear-only	An automatically calculated value indicating Dynamic Range (crest factor). See also: [3]
Edit Info	Image			String Not editable	Internal information used for image editing.
Editor	Audio Image Video			List List	A semicolon-separated list of the editor(s) used to capture/create a video.
Embedded CUE	Audio			String Not editable	Automatically calculated data indicating file uses embedded CUE file.
Encoding Settings	Audio Image Video Data TV			String Standard	Description
Episode	Audio Video TV	✓		String Standard	Episode number of a television / video series.
Episode URL	Audio Image Video Data TV	✓		String Not editable	URL of a single podcast episode.
Events  events=	Audio Image Video Data TV	✓	✓	List List	A semicolon-separated list to specify relevant events for the media.
Feed URL	Audio Image Video Data TV	✓		String Not editable	URL of a podcast feed.
File Size  size=	Audio Image Video Data TV			Unknown Not editable	A file's on disc size (human readable, unitized and rounded).
File Type  filetype=	Audio Image Video Data TV		✓	String Standard	The type of file (e.g. mp3, jpg, flac, pdf).
Filename  filename=  location=	Audio Image Video Data TV		✓	Unknown File	The full pathname to the location of a file.
Filename (name)	Audio Image Video Data TV			String Calculated, Editable	The name-only portion of [Filename]. Expression: FileName()
Filename (path)	Audio Image Video Data TV			Unknown Calculated, Editable	The path-only portion of [Filename]. Expression: FilePath()&DataType[Path]
Flash	Image			String Not editable	Indicates if a camera's flash was used to take image. See also: Photo Tagging
Flickr Info	Image Video			String Not editable	Description
Focal Length	Image			String Not editable	The lens focal length used when a image was captured. See also: Photo Tagging
FPS  framerate=  fps=	Video			Decimal Standard	The number of frames-per-second in a video/movie.
G - I  Genre  genre=  g=	Audio Image Video Data TV	✓	✓	List Standard	Genre of media. See also: YADB
Get Cover Art Info	Audio Video Data			String Not editable	Description
Get Metadata Info	Audio Video Data			String Not editable	Description
Gross Revenue	Video			String Standard	A movie's gross reported revenue.
Grouping	Audio Image Video Data TV	✓		String Standard	For support of the iTunes Grouping field. See also: [4]
Height  height=	Image Video			Integer Not editable	The height dimension of an image/video (see also Dimensions above).
Image File  imagefile=	Audio Video	✓		Unknown Not editable	The name of the associated artwork for audio/video. See also: Cover Art
IMDb ID	Video	✓		Unknown Standard	The unique Internet Movie Database identifier for video lookups.
Instrument	Audio	✓		String Standard	A song's primary instrument.
Intensity  intensity=	Audio	✓		Integer Standard	A musical intensity metric automatically calculated during audio analysis. Obsoleted in MC19. Values: 1, 2, 3, 4, 5
ISO	Image			String Not editable	The ISO standard film speed used when an image was captured. See also: Photo Tagging
Keywords  keyword=  keywords=  kw=	Audio Image Video Data TV	✓	✓	List List	A semicolon-separated list of user-defined keywords.
Language	Audio Image Video Data TV			List List	A semicolon-separated list of languages.
Last Played  lastplayed=	Audio Image Video Data TV			Unknown Clear-only	Date / time the file was last played or viewed.
Last Skipped  lastskipped=	Audio Image Video Data TV			Unknown Clear-only	Date / time the file was last skipped. See also: Skip Count
Latitude	Image			String Standard	Camera's GPS latitude when photo was taken. See also: Photo Tagging
Lens  lens=	Image	✓	✓	String Standard	Lens description from EXIF tag (Canon cameras). See also: Photo Tagging
Library Server Info	Audio Image Video Data TV			String Not editable	Internal information used to manage state for Library Server.
Library Server Key	Audio Image Video Data TV			Integer Not editable	Internal authorization key used to help secure Library Server.
Library Server URL	Audio Image Video Data TV			String Not editable	URL used to specify location of Library Server.
Longitude	Image			String Standard	Camera's GPS longitude when photo was taken. See also: Photo Tagging
Lyricist	Audio Video	✓		String Standard	The lyricist responsible for a work.
Lyrics  lyrics=	Audio Video	✓		String Large	User-stored lyrics or transcription.
M - O  Media Sub Type  mediasubtype=	Audio Image Video Data TV		✓	String Standard	More specific sub-classification of Media Type, generally used to drive Media Center behavior in some fashion. Values: Adult, Audiobook, Book, Educational, Home Video, Karaoke, Movie, Music, Music Video, Other, Photo, Podcast, Radio, Remix, Ringtone, Short, Single, Stock, System, Test Clip, Trailer, TV Show
Media Type  mediatype=	Audio Image Video Data TV		✓	String Standard	General classification of media type. Values: Audio, Image, Video, TV, Data, Playlist
Mix Album  mixalbum=	Audio	✓		Integer Not editable	Used to specify if an album is a mix album.
Mood  mood=	Audio	✓		String Standard	Legacy: Musicmatch mood classification of a song.
MPAA Rating  mpaa=	Video			String Standard	A movies MPAA rating.
MPAA Rating Description	Video			String Standard	A textual description of MPAA rating.
Music By	Video			List List	A semicolon-separated list of people responsible for a movie's music.
Name  name=  title=  n=	Audio Image Video Data TV	✓	✓	String Standard	The primary name associated with a file. When used as thumbnail or caption text, [Name] takes on the name of the current category in Category or Theater views.
Notes  notes=	Audio Image Video Data TV	✓		String Large	General notes associated with a file.
Number Plays  numberplays=	Audio Image Video Data TV			Integer Clear-only	An automatically updated statistic indicating the number of times a file has been played/viewed. See also: Changing the number of plays
Orchestra	Audio	✓		String Standard	The name of the orchestra responsible for performing a piece, typically used with classical music.
Orientation	Image		✓	String Calculated, Not editable	An image's orientation as Landscape, Portrait, or Square. Expression: Orientation()
Original Title	Audio Image Video Data TV			String Standard	The original title given to a work.
P - R  Peak Level  peaklevel=	Audio	✓		Percentage Clear-only	An automatically calculated value indicating the percentage of an audio track's maximum level before clipping would occur. Obsoleted in MC19. See also: Overflow Handling, Technical Information on Replay Gain Adjustment, Analyze Audio, [5]
Peak Level (R128)  peaklevel=	Audio Video	✓		String Clear-only	An automatically calculated value indicating R128 Peak Level in dBTP (aka True Peak Level). See also: [6]
Peak Level (Sample)	Audio Video	✓		String Clear-only	An automatically calculated value indicating R128 Peak Level inside the file. See also: [7]
People  people=	Audio Image Video Data TV	✓	✓	List List	A semicolon-separated list of people associated with a work.
Period	Audio	✓		String Standard	A musical period, typically used with classical music.
Places  places=	Audio Image Video Data TV	✓	✓	List List	A semicolon-separated list of places associated with a work.
Playback Channel Key	TV			Integer Not editable	Description
Playback Device	TV			String Not editable	Description
Playback Info	Audio Video			String Standard	Description
Playback Range  playbackrange=	Audio Video			String Standard	Specifies the begin and end times for A-B repeat. See also: Playback Range (A-B Playback)
Popularity	Audio Image Video Data TV			String Standard	Flexible popularity field (e.g. for web radio, '3123 listeners').
Preference  preference=	Audio	✓		String Standard	Legacy: Musicmatch subjective classification of a user's preference for a song.
Prequel	Video			List List	The prequel to a movie.
Producer  producer=	Audio Image Video Data TV			List List	A semicolon-separated list of responsible producer(s)
Protection Type  protectiontype=	Audio Video			String Not editable	Indication of the type of DRM protection.
Publisher	Audio Image Video Data TV	✓		String Standard	A work's publisher.
Rating  rating=  r=	Audio Image Video Data TV	✓	✓	Integer 5 Star	A 5-star user rating.
Read Only  readonly=	Audio Image Video Data TV			Integer Not editable	Indicates if the file is read-only. Values: 0, 1
Recording Rule ID	TV			Integer Not editable	An internal ID representing a TV recording rule.
Removable  removable=	Audio Image Video Data TV			Integer Calculated, Not editable	Indicates if the file resides on removable media. Expression: IsRemovable()
Replay Gain  replaygain=  rg=	Audio	✓		Decimal Clear-only	An automatically calculated value indicating the gain to be applied to an audio track. Obsoleted in MC19. See also: Replay Gain, Album Gain, Audio Settings and Analysis, Analyze Audio
Rerun	TV			Integer Not editable	Flag indicating if TV show is a rerun.
Rotation	Image			Integer Standard	The rotation (in degrees) applied to an image.
S - U  Sample Rate	Audio Video			Integer Not editable	The rate of sampling for an audio/video file.
Screenwriter  screenwriter=	Video			List List	The screenwriter responsible for a movie. Note: Libraries created prior to 16.0.152 will have the typo "screenwirter" as the keyword. This may be corrected freely.
Season	Video TV	✓		String Standard	The season of a movie/video series.
Sequel	Video			List List	The sequel to a movie.
Series	Audio Image Video TV	✓	✓	String Standard	The series information for a movie or TV show.
Series Description	Audio Image Video TV	✓	✓	String Standard	A description of the series for a movie or TV show.
Service: ID	Audio Image Video Data TV	✓		String Not editable	Description
Service: Item Info	Audio Image Video Data TV	✓		String Not editable	Description
Service: Name	Audio Image Video Data TV	✓		String Not editable	Description
Service: Stream Metadata	Audio Image Video Data TV			String Not editable	Description
Shutter Speed	Image			String Not editable	The shutter speed used to capture an image. See also: Photo Tagging
Situation  situation=	Audio	✓		String Standard	Legacy: Musicmatch subjective choice of situations for when playing the song would be appropriate or relevant.
Skip Count  skipcount=	Audio Image Video Data TV			Integer Clear-only	An automatically updated statistic indicating the number of times a file has been skipped. See also: Last Skipped
Soloists	Audio	✓		List List	A semicolon-separated list of soloists for a music work, typically used in classical music.
Stack Conversion Type	Audio Image Video Data TV			String Not editable	Unknown, seems currently unused.
Stack Files	Audio Image Video Data TV			String Not editable	A list of internal IDs that reference each member of the stack. Set only in the stack's top member (auto-generated cache members will also have the ID).
Stack Tag  stacktag=	Audio Image Video Data TV			String Not editable	Used to indicate if file was generated via handheld cache conversion or the Particle system. Values:' HH Conversion, Particle or empty.
Stack Top	Audio Image Video Data TV			Integer Not editable	A unique numeric stack ID for each member of a stack, and -1 otherwise.
Stack View	Audio Image Video Data TV			Integer Not editable	Determines if the stack is expanded (empty) or collapsed (1).
Store Field: Album ID	Audio Image Video Data TV			String Not editable	Description
Store Field: Album Popularity	Audio Image Video Data TV			Integer Not editable	Description
Store Field: Amg Album Review	Audio Image Video Data TV			String Not editable	Description
Store Field: Amg Artist Bio	Audio Image Video Data TV			String Not editable	Description
Store Field: Artist ID	Audio Image Video Data TV			String Not editable	Description
Store Field: Artist Popularity	Audio Image Video Data TV			Integer Not editable	Description
Store Field: Asset Code	Audio Image Video Data TV			String Not editable	Description
Store Field: Assosciated Video ID	Audio Image Video Data TV			List Not editable	Description
Store Field: Available Asset	Audio Image Video Data TV			String Not editable	Description
Store Field: Download Date	Audio Image Video Data TV			Date Not editable	Description
Store Field: Genre ID	Audio Image Video Data TV			String Not editable	Description
Store Field: License Count	Audio Image Video Data TV			String Not editable	Description
Store Field: License Reissue Count	Audio Image Video Data TV			String Not editable	Description
Store Field: MP3 Available	Audio Image Video Data TV	✓		String Not editable	Description
Store Field: MusicNet File GUID	Audio Image Video Data TV			String Not editable	Description
Store Field: New Release	Audio Image Video Data TV			Integer Not editable	Description
Store Field: Number of Tracks	Audio Image Video Data TV			Integer Not editable	Description
Store Field: Playlist Description	Audio Image Video Data TV			String Not editable	Description
Store Field: Playlist Guid	Audio Image Video Data TV			String Not editable	Description
Store Field: Playlist Image	Audio Image Video Data TV			String Not editable	Description
Store Field: Playlist Name	Audio Image Video Data TV			String Not editable	Description
Store Field: Playlist Type	Audio Image Video Data TV			String Not editable	Description
Store Field: Purchase Date	Audio Image Video Data TV			Date Not editable	Description
Store Field: Purchase Description	Audio Image Video Data TV			String Not editable	Description
Store Field: Ranking	Audio Image Video Data TV			Integer Not editable	Description
Store Field: Similar Artists	Audio Image Video Data TV			String Not editable	Description
Store Field: Store Name	Audio Image Video Data TV			String Not editable	Description
Store Field: Track ID	Audio Image Video Data TV			String Not editable	Description
Studios  studios=	Video			List List	A semicolon-separated list of responsible movie studios.
Style	Audio	✓		String Standard	A musical style, typically used to further refine genre.
Tag Line  tagline=	Video			String Standard	A movie's branding or slogan.
Tempo  tempo=	Audio	✓		String Standard	Legacy: Musicmatch subjective indication of a track's tempo.
Text	Data			String Not editable	General text describing a data file.
TheTVDB Series ID	Video TV	✓		Integer Standard Relational per-series	The unique TVDB series identifier for video/tv lookups; use when performing Get Movie & TV Info, backdrop artwork queries, etc.
Thumbnail Info	Audio Image Video Data TV			Integer Not editable	Internal information used for view thumbnails.
Thumbnail Info (Local)	Audio Image Video Data TV			Integer Not editable	Internal information used for view thumbnails.
Thumbnail Offset Large	Audio Image Video Data TV			Integer Not editable	Internal information used for view thumbnails.
Thumbnail Offset Medium	Audio Image Video Data TV			Integer Not editable	Internal information used for view thumbnails.
Thumbnail Offset Small	Audio Image Video Data TV			Integer Not editable	Internal information used for view thumbnails.
Track #  tracknumber=  t=	Audio Image Video	✓	✓	Integer Standard	The track number of the song within an album. When used as Thumbnail text, will be the total number of files for the grouping.
TV Channel	TV			String Not editable	The TV channel used for a TV recording. See also: [8]
TV Channel Number	TV			String Standard	Defines remote channel number used to tune TV Channel. See also: [9]
TV Tuner Input Type	TV			String Not editable	Description
TV XMLTV ID	TV			String Standard	Stores ID used when mapping a channel to XMLTV data. See also: [10]
UPC	Audio Image Video Data TV	✓		String Standard	Universal Product Code.
User  u=	Audio Image Video Data TV		✓	Unknown List	A list of users allowed to see/access the file. See also: [11]
Usage Reporting Info	Audio Image Video Data TV			String Not editable	Description
Use Bookmarking	Audio Video			String Standard	Specifies if bookmarking is active for the track / video. Values: Default, Yes, No
V - Z  Video Standard	Video			String Standard	The encoding/decoding video standard in use (e.g. NTSC, PAL, SECAM).
Volume Name  volume=	Audio Image Video Data TV			String Standard	The name of the volume on which the file resides. Expression: FileVolume()
Volume Level (R128)	Audio Video	✓		Decimal Clear-only	An automatically calculated value indicating R128 Volume Level. See also: [12]
Volume Level (ReplayGain)	Audio Video	✓		Decimal Clear-only	An automatically calculated value for ReplayGain backwards compatibility. See also: [13]
Web Media Info	Audio Image Video Data TV	✓		String Standard	Description
Web Media Search	Audio Image Video Data TV	✓		String Standard	Description
Web Media URL	Audio Image Video Data TV	✓		String Standard	The URL of a remote media file, or for Scheduler recorded media, the value Recording... or Recorded Media.
Width  width=	Image Video			Integer Not editable	The width dimension of an image/video (see also Dimensions above).
Year - Album	Audio			String Calculated, Not editable	An combination of Year and Album used for views, sorting, etc. Expression: Clean(FormatDate([Date, ], Year) - [Album])

Custom Fields

Custom fields may be added with the Add New Field button in the Tools > Options > Libraries & Folders > Manage Library Fields... dialog.

Custom fields can act as library-wide global values, to be used in expressions, as columns, etc.

Custom fields may be calculated expression fields, in that they will be evaluated when used. Storage for calculated fields does not add additional library storage per file, since they are evaluated when used. If configured to be default search fields, calculated fields will produce some search performance penalty in search box suggestions, and possibly other library searches.

Values of calculated fields cannot be stored in file tags.

Tag Import Options

Media Center provides a few options for the importation of tags for some file types. These encoder-specific options are available under Tools > Options > Encoding > Encoder > Encoder settings... (pre-MC18, see Plug-in Manager > Input).

For images and video, Media Center will fill in the Album field with the year of the image or video (if the album field is otherwise empty). This puts a reasonable value there when importing directly from a digital camera. (TBD - should this be moved? Is it comprehensive wrt other types/fields?)

To import non-default file tags into Media Center, first create a custom field named exactly as the physical tag appears in the media file. Subsequent imports, or Update library (from tags) will populate the custom field with the file tag values. A tag dump will show the physical file tags for a single selected file.

Classical Music

The tagging of classical music is unfortunately more complex and standards are lax. See Tagging Classical Music.

Photos

For more comprehensive information on tagging photos, see Photo Tagging.

More

• [ Note: Work in Progress. See: http://yabb.jriver.com/interact/index.php?topic=65761.0 ]
• Check if a file contains tag information
• Edit File Properties (tags)
• Save File Properties in Disk Files
• Remove Tags
• Sync the database and tags
• Licensed Files (Windows Media Manager)
• Multiple Artist Albums
• Re-rip existing music and keep tags and statistics
• Tree & View Settings
• Library Tools
• Cover Art
• [14]

For more information on tag/metadata specifications for file formats, refer to the following external websites:

• mp3: [15]
• Vorbis/FLAC: [16]
• exif: ...
• jpg: ...
• ...