Thing > Annotation > Region > Polygon

Definition	A polygon in an image or video. This is a two-dimensional object so if this occurs in a video it will be anchored to a particular frame or time point in the video.
URI	http://mmif.clams.ai/0.2.1/vocabulary/Polygon

Metadata

Metadata from Region

Property	Type	Description
unit	String	The unit used to determine boundaries. For text regions this is typically *offsets* to indicate character offsets, for images this is could be *pixels*, and for audio or video streams *seconds*, *milliseconds*, *timestamps* or *frames*.

Metadata from Annotation

Property	Type	Description
document	ID	The identifier of the document that the annotation is over. This has to be defined either at the metadata level, in which case it has scope over all annotations of the same type in a view, or at the instance level, in which it has scope over just the single annotation.

Properties

Property	Type	Description
coordinates	List of pairs	The coordinates of the polygon. [Required]
timePoint	ID	If on a video stream, the TimePoint that the BoundingBox occurs in.

Properties from Annotation

Property	Type	Description
document	ID	The identifier of the document that the annotation is over.

Properties from Thing

Property	Type	Description
id	ID	A unique identifier for the annotation or document. Uniqueness is relative to the view the annotation is in or the list of documents at the top level of a MMIF file. [Required]