Thing > Annotation > Region > Interval > Span

Definition	An annotation over a region in primary text data. A Span may be defined by pointing directly into primary data (by using start and end offsets) or by linking to one or more other Annotations with the targets property.
URI	http://mmif.clams.ai/vocabulary/Span/v2
Similar to	http://vocab.lappsgrid.org/Region

Metadata

Metadata from Region

Property	Type	Description
timeUnit	String	Specifies which unit of time the measurement is based. Can be *seconds* or *milliseconds*, or in case of annotations on a VideoDocument, *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.
labelset	List of Strings	When an annotation object contains results of a classification task, this metadata is used to specify the label values used in classification. Individual annotations then must have label property that is one of the values in this list. [Note] Annotations from a classifier app must have this metadata or labelsetUri metadata. [Note] Not all of labels specified in the labelset must occur in the output annotations. For example, a labelset can contain a catch-all negative label, but if the negative label can be not interesting enough to keep in the output annotation.
labelsetUri	String	A URI to an externally defined labelset. Since the labelset metadata is a list of simple strings, this URI can be used to point to a more detailed definition of the labelset. This can be a JSON-LD document or a SKOS concept scheme, for example. [Note] Annotations from a classifier app must have this metadata or labelset metadata.

Properties

Properties from Interval

Property	Type	Description
start	Integer	The starting offset in the primary data. This point is inclusive. For time intervals, the unit is determined by the *timeUnit* metadata key. For text intervals, the unit is Unicode code point.
end	Integer	The ending offset in the primary data. This point is exclusive. For time intervals, the unit is determined by the *timeUnit* metadata key. For text intervals, the unit is Unicode code point.
targets	List of IDs	IDs of a sequence of annotations covering the region of primary data referred to by this annotation. Used as an alternative to *start* and *end* to point to component annotations (for example a token sequence) rather than directly into primary data, or to link two or more annotations (for example in a coreference annotation).

Properties from Annotation

Property	Type	Description
document	ID	The identifier of the document that the annotation is over.
label	String	A label given to this object by a classifier. The value must be a simple string value of the label and must be one of the values defined in the labelset or labelsetUri annotation metadata. [Note] Annotations from a classifier app must have this property.
classifications	Map from String to Number	A map from label values to their "score" numbers provided by a classifier. The score can be probability, similarity, confidence, or any other real number that was used to determine the label value. [Optional] on top of the label property. However when this property is used, the label property must be one of the keys and the keys must match to the values defined in the labelset or labelsetUri annotation metadata.

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]