Elements defined


instantiationDimensions is an element that specifies either the dimensions of a physical instantiation, or the high-level visual dimensions of a digital instantiation

Best Practice: For physical dimensions, usage examples might be 7″ for an audio reel. When describing visual dimensions, use this for high-level descriptors such as 1080p. Use the element frameSize to describe the pixel dimensions of a visual resource.

Usage: optional, repeatable


  • unitsOfMeasure: optional | The unitsOfMeasure attribute defines the unit used in the containing element, e.g. pixels, GB, Mb/s, ips, fps, kHz, inches, lines, dpi. Can be used as an attribute of the following elements - essenceTrackAspectRatio, essenceTrackBitDepth, essenceTrackDataRate, essenceTrackFrameRate, essenceTrackFrameSize, essenceTrackPlaybackSpeed, essenceTrackSamplingRate, instantiationDataRate, instantiationDimensions, instantiationFileSize.
  • source: optional | The source attribute provides the name of the authority used to declare the value of the element. Required attribute for pbcoreIdentifier and instantiationIdentifier elements. Can be used as an attribute of any element.
  • ref: optional | The ref attribute is used to supply a source’s URI for the value of the element. Can be used as an attribute of any element.
  • version: optional | The version attribute identifies any version information about the authority or convention used to express data of this element. Can be used as an attribute of any element.
  • annotation: optional | The annotation attribute includes narrative information intended to clarify the nature of data used in the element. Can be used as an attribute of any element.


This element does not have any subelements.


    <instantiationDimensions annotation="letterbox">720x480</instantiationDimensions>
    <instantiationDimensions unitsofmeasure="pixels">100x200</instantiationDimensions>
    <instantiationDimensions unitsofmeasure="inches">5x7</instantiationDimensions>