"This is the PBCore version 1.2.1 XML schema. All element descriptions can be found at http://www.pbcore.org" "The Master Container assembles together all collections of PBCore knowledge items. For PBCore these knowledge items are metadata descriptions of media. The MasterContainer is expressed as a document that hierarchically structures all the knowledge items and metadata terms and values related to a single data record associated with a media item. In our XML Schema Definition, the MasterContainer is referred to as the 'PBCoreDescriptionDocument.'" "The descriptor identifier is used to reference or identify the entire record of metadata descriptions for a media item and exists at the top level for a PBCore description and its associated description document (XML). Best practice is to identify the media item (whether analog or digital) by means of an unambiguous string or number corresponding to an established or formal identification system if one exists. Otherwise, use an identification method that is in use within your agency, station, production company, office, or institution." "The descriptor identifierSource is used in combination with the unambiguous reference or identifier for a media item found in the descriptor identifier. Thus PBCore provides not only a locator number, but also an agency or institution who assigned it. Both exist at the top level for a PBCore description and its associated description document (XML)." "The descriptor title is a name given to the media item you are cataloging. It is the unique name everyone should use to refer to or search for a particular media item. There are obviously many types of titles a media item may have, such as a series title, episode title, segment title, or project title. Use the descriptor titleType to indicate the type of title you are assigning to the media item." "The descriptor titleType is a companion metadata field associated with the descriptor title. For a title you give to a media item, you may wish to inform end users what type of title it is (see the picklist of recommended vocabulary terms)." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_titleType.html" "The descriptor subject is used to assign topical headings or keywords that portray the intellectual content of the media item you are cataloging. Typically, a subject is expressed by a limited number of keywords, key phrases, or even specific classification codes. Controlled vocabularies, authorities, or formal classification schemes may be employed when assigning descriptive subject terms (rather than using random or ad hoc terminology)." "Use reference at http://www.utah.edu/cpbmetadata/PBCore/subject.html" "If subjects are assigned to a media item using the descriptor subject and the terms used are derived from a specific authority or classification scheme, use subjectAuthorityUsed to identify whose vocabularies and terms were used." "The metadata element description uses free-form text or a narrative to report general notes, abstracts, or summaries about the intellectual content of a media item you are cataloguing. The information may be in the form of a paragraph giving an individual program description, anecdotal interpretations, or brief content reviews. The description may also consist of outlines, lists, bullet points, rundowns, edit decision lists, indexes, or tables of content." "The descriptor descriptionType is a companion metadata field to the element description. The purpose of descriptionType is to identify the nature of the actual description and flag the form of presentation for the information." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_descriptionType.html" "The descriptor genre describes the manner in which the intellectual content of a media item is presented, viewed or heard by a user. It indicates the structure of the presentation, as well as the topical nature of the content in a generalized form." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_genre.html" "If genre keywords are assigned to a media item using the descriptor genre and the terms used are derived from a specific authority or classification scheme, use genreAuthorityUsed to identify whose vocabularies and terms were used. PBcore supplies its own picklist of terms, but others may be employed as long as the authority for a picklist is identified." When genreAuthorityUsed is not used, the default is understoond to be PBCore Genre List. "The descriptor relationType identifies the type of intellectual content bond between a media item you are cataloging and some other related media item." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_relationType.html" "Once the type of relationship between two media items is identified byusing the descriptor relationType, then this companion descriptor relationIdentifier is used to provide a name, locator, accession, identification number or ID where the related item can be obtained or found. The cross reference uses a unique identifier." "The descriptor coverage uses keywords to identify a span of space or time that is expressed by the intellectual content of a media item. Coverage in intellectual content may be expressed spatially by geographic location. Actual place names may be used. Numeric coordinates and geo-spatial data are also allowable, if useful or supplied. Coverage in intellectual content may also be expressed temporally by a date, period, era, or time-based event. The PBCore metadata element coverage houses the actual spatial or temporal keywords. The companion descriptor coverageType is used to identify the type of keywords that are being used." "Use reference at http://www.utah.edu/cpbmetadata/PBCore/coverage.html" "Whereas the PBCore metadata element coverage uses keywords and descriptors to identify a span of space or time that is expressed by the intellectual content of a media item, coverageType is used to identify the actual type of keywords that are being used. Coverage in intellectual content may be expressed spatially by geographic location. Coverage in intellectual content may also be expressed temporally by a date, period, era, or time-based event. coverageType provides a picklist of coverage types, namely *spatial* or *temporal*." "The descriptor audienceLevel identifies a type of audience, viewer, or listener for whom the media item you are cataloging is primarily designed or educationally useful." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_audienceLevel.html" "The descriptor audienceRating designates the type of users for whom a media item is intended or judged appropriate in terms of its intellectual content. Standard ratings have been crafted by the broadcast television and film industries and are used as flags for audience or age-appropriate materials." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_audienceRating.html" "The descriptor creator identifies a person or organization primarily responsible for creating a media item. The creator may be considered an author and could be one or more people, a business, organization, group, project or service." "Use the descriptor creatorRole to identify the role played by the person or group identified in the companion descriptor creator. Unlike print resources, there is usually no single role, like an author, who has primary responsibility for the creation of media items such as audio, video, film assets, and their digital renditions. For these media, creators can fill many different roles, such as the instructor for a video course, the interviewee from a video history program, or the director of a program or film (if they are identified as the primary creator for a media item)." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_creatorRole.html" "The descriptor contributor identifies a person or organization that has made substantial creative contributions to the intellectual content within a media item. This contribution is considered to be secondary to the primary author(s) (person or organization) identified in the descriptor creator." "Use the descriptor contributorRole to identify the role played by the person or group identified in the companion descriptor contributor." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_contributorRole.html" "The descriptor publisher identifies a person or organization primarily responsible for distributing or making a media item available to others. The publisher may be a person, a business, organization, group, project or service." "Use the descriptor publisherRole to identify the role played by the specific publisher or publishing entity identified in the companion descriptor publisher." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_publisherRole.html" "Use the descriptor rightsSummary as an all-purpose container field to identify information about copyrights and property rights held in and over a media item, whether they are open access or restricted in some way. If dates, times and availability periods are associated with a right, include them. End user permissions, constraints and obligations may also be identified, as needed." "The descriptor formatIdentifier employs an unambiguous reference or identifier for a particular rendition/instantiation of a media item. Best practice is to identify the media item (whether analog or digital) by means of a string or number corresponding to an established or formal identification system if one exists. Otherwise, use an identification method that is in use within your agency, station, production company, office, or institution." "The descriptor formatIdentifierSource is used in combination with the unambiguous reference or identifier for a rendition/instantiation of a media item as found in the descriptor formatIdentifier. Thus PBCore provides not only a locator number, but also indicates an agency or institution who assigned it." "Use the descriptor dateCreated to specify the creation date for a particular version or rendition of a media item across its life cycle. It is the moment in time that the media item was finalized during its production process and is forwarded to other divisions or agencies to make it ready for publication or distribution. A specific time may also be associated with the date." "The descriptor dateIssued specifies the formal date for a particular version or rendition of a media item has been made ready or officially released for distribution, publication or consumption. A specific time may also be associated with the date." "Use the descriptor formatPhysical to identify the format of a particular version or rendition of a media item as it exists in an actual physical form that occupies physical space (e.g., a tape on a shelf), rather than as a digital file residing on a server or hard drive." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_formatPhysical.html" "Use the descriptor formatDigital to identify the format of a particular version or rendition of a media item as it exists in its digital form, i.e., as a digital file on a server or hard drive. Digital media formats may be expressed with formal Internet MIME types." "MIME types change often see references at http://www.utah.edu/cpbmetadata/PBCore/formatDigital.html" "Picklist may not be up to date at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_formatDigital.html" "The descriptor formatLocation is considered to be an "address for a media item." For an organization or producer acting as caretaker of a media resource, formatLocation may contain information about a specific shelf location for an asset, including an organization's name, departmental name, shelf ID and contact information. The formatLocation for a data file or web page may include domain, path, filename or html page." "The descriptor formatMediaType identifies the general, high level nature of the content of a media item. It uses categories that show how content is presented to an observer, e.g., as a sound or text or moving image." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_formatMediaType.html" "The descriptor formatGenerations identifies the particular use or manner in which a version or rendition of a media item is used, e.g., Audio/Narration or Moving image/Backup master." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_formatGenerations.html" "Use the descriptor formatFileSize to indicate the storage requirements or file size of a digital media item. As a standard, express the file size in bytes." "The descriptor formatTimeStart provides a time stamp for the beginning point of playback for a time-based media item, such as digital video or audio. Use in combination with formatDuration to identify a sequence or segment of a media item that has a fixed start time and end time." "The descriptor formatDuration provides a timestamp for the overall length or duration of a time-based media item. It represents the playback time." "The descriptor formatDataRate is expresses the amount of data in a digital media file that is encoded, delivered or distributed, for every second of time. Although optimal data rates are often dependent on the codec used to compress and encode a digital file, generally speaking, a larger data rate translates into a better quality playback experience, for example 56 kilobits/second vs. 1 megabit/second." "The descriptor formatColors indicates the overall color, grayscale, or black and white nature of a media item, as a single occurrence or combination of occurrences in or throughout the media item." "http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_formatColors.html" "The descriptor formatTracks is simply intended to indicate the number and type of tracks that are found in a media item, whether it is analog or digital. For example, 1 video track, 2 audio tracks, 1 text track, 1 sprite track, etc. Other configuration information specific to these identified tracks should be described using formatChannelConfiguration." "The descriptor formatChannelConfiguration is designed to indicate the arrangement or configuration of specific channels or layers of information within a media item's tracks. Examples are 2-track mono, 8 track stereo, or video track with alpha channel." "The descriptor language identifies the primary language of a media item's audio or text. Alternative audio or text tracks and their associated languages should be identified using the descriptor alternativeModes." "Use reference at http://www.utah.edu/cpbmetadata/PBCore/language.html" "The descriptor alternativeModes is a catch-all metadata element that identifies equivalent alternatives to the primary visual, sound or textual information that exists in a media item. These are modes that offer alternative ways to see, hear, and read the content of a media item. Examples include DVI (Descriptive Video Information), SAP (Supplementary Audio Program), ClosedCaptions, OpenCaptions, Subtitles, Language Dubs, and Transcripts. For each instance of available alternativeModes, the mode and its associated language should be identified together, if applicable. Examples include 'SAP in English,' 'SAP in Spanish,' 'Subtitle in French,' 'OpenCaption in Arabic.'" "" "" "" "Use the descriptor essenceTrackStandard to identify a larger technical system/standard or overarching media architecture under which various media formats exist, e.g., NTSC is a system/standard under which many video formats exist." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackStandard.html" "The descriptor essenceEncoding identifies how the actual information in a media item is compressed, interpreted, or formulated using a particular scheme. Identifying the encoding used is beneficial for a number of reasons, including as a way to achieve reversible compression; for the construction of document indices to facilitate searching and access; or for efficient distribution of the information across data networks with differing bandwidths or pipeline capacities." "The descriptor essenceTrackDataRate is expresses the amount of data in a digital media file that is encoded, delivered or distributed, for every second of time. Although optimal data rates are often dependent on the codec used to compress and encode a digital file, generally speaking, a larger data rate translates into a better quality playback experience, for example 56 kilobits/second vs. 1 megabit/second." "The descriptor essenceTrackTimeStart provides a time stamp for the beginning point of playback for a time-based media item, such as digital video or audio. Use in combination with essenceTrackDuration to identify a sequence or segment of a media item that has a fixed start time and end time." "The descriptor formatDuration provides a timestamp for the overall length or duration of a time-based media item. It represents the playback time." "For a media item (specifically, audio, video, or image), the descriptor essenceTrackBitDepth measures "How Much" data is sampled when information is digitized, encoded, or converted. Bit depth is measured in bits and is an indicator of the perceived viewing or playback quality of a media item (the higher the bit depth, the greater the fidelity)." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackBitDepth.html" "For a media item (specifically audio), the descriptor essenceTrackSamplingRate measures "How Often " data is sampled when information is digitized. For a digital audio signal, the sampling rate is measured in kiloHertz and is an indicator of the perceived playback quality of the media item (the higher the sampling rate, the greater the fidelity)." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackSamplingRate.html" "The descriptor essenceTrackFrameSize indicates the horizontal and vertical resolution of a format type. It may be expressed in pixels, pixels per inch, or in the case of ATSC digital TV, a combination of pixels measured horizontally vs. the number of pixels of image/resolution data stacked vertically (interlaced and progressive scan)." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackFrameSize.html" "The descriptor essenceTrackAspectRatio indicates the ratio of horizontal to vertical proportions in the display of an static image or moving image." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackAspectRatio.html" "The descriptor essenceTrackFrameRate indicates the frames per second found in a video, motion sequence, flash file, or animation's playback or display." "Picklist at http://www.utah.edu/cpbmetadata/PBCore/picklists/picklist_essenceTrackFrameRate.html" "The descriptor essenceTrackLanguage identifies the primary language of the tracks audio or text. Alternative audio or text tracks and their associated languages should be identified using the descriptor alternativeModes." "Use reference at http://www.utah.edu/cpbmetadata/PBCore/essenceTrackLanguage.html" "The descriptor essenceTrackAnnotation is a stand-alone PBCore element where you can catalog any supplementary information about a track or the metadata used to describe it. annotation clarifies element values, terms, descriptors, and vocabularies that may not be otherwise sufficiently understood." "The descriptor dateAvailableStart specifies a specific start date for the availability of a version or rendition of a media item. It may refer to start dates for the availability of a program that is broadcast locally, regionally, nationally or internationally, or for web-based distribution. A specific time may also be associated with the date." "The descriptor dateAvailableEnd specifies a specific end date for the availability of a version or rendition of a media item. It may refer to end dates for the availability of a program that is broadcast locally, regionally, nationally or internationally, or for web-based distribution. A specific time may also be associated with the date." "The descriptor annotation is a stand-alone PBCore element where you can catalog any supplementary information about a media item or the metadata used to describe it. annotation clarifies element values, terms, descriptors, and vocabularies that may not be otherwise sufficiently understood." "The descriptor extension provides metadata descriptions crafted into metadata dictionaries and schemas outside of the PBCore Metadata Dictionary Project. These extensions fulfill the metadata requirements for communities identifying and describing their own types of media with specialized, custom terminologies." "If metadata extensions to PBCore are assigned to a media item with the descriptor extension, and the terms used are derived from a specific authority or metadata scheme, use extensionAuthorityUsed to identify whose metadata extensions are being used."