Thing > Annotation > Region > Interval > TimeFrame
| Definition | A temporal interval in an audio or video stream. This is similar to the term segment used in audio processing, but that term has a different meaning in the image and video community. |
| URI | http://mmif.clams.ai/0.2.1/vocabulary/TimeFrame |
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 |
|---|---|---|
| frameType | String | The type of TimeFrame. Could be bars-and-tones, speech, noise, music, other. |
Properties from Interval
| Property | Type | Description |
|---|---|---|
| start | Integer | The starting offset in the primary data. What unit is used is determined by the *unit* metadata property. |
| end | Integer | The ending offset in the primary data. What unit is used is determined by the *unit* metadata property. |
| 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. |
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] |