Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 As a resource, a binary unit could be annotated to provide, for example, meta-information on its content or its format. It can also be described with low level descriptors. Binary media unit is abstract and enable its inherited media units to have the capability to store their native content is a binary 64 field. But when this content is very large, the use of the binary content is encouraged. It fact, the real binary content of the binary unit will be in a content object and not in the content field of binary media unit. This will prevent the transport of the whole content between every services in the platform if not needed. If the content is in a separated content object, then the binary media unit object should be annotated with the URI of this content object. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 The optional content as a byte array. An audio unit describes audio content out of media document. It does not have any particular attribute but only allow describing the structure. As a resource it can be annotated to describe the audio content. It can also be described using low level descriptors. The original content may be in content field or a reference using an annotation should be made to the content. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 An image unit describe a visual static content out of media document. It does not have any particular attribute but only allow describing the structure. As a resource it can be annotated to describe the content. It can also be described using low level descriptors. The original content may be in the content field or a reference using annotation should be made to the content. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 A video unit describes a dynamic visual content out of media document. As a resource it can be annotated to describe the content. It can also be described using low level descriptors. The original content may be in the content field or a reference using annotation should be made to the content. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 A spatial segment is aiming to localise any meaningful content in a spatial document. For example, one can think to a picture showing some people. Specific segment can be localised with coordinate descriptors defining the silhouettes of each person in the picture. Then specific annotation can be applied to each segment (i.e. to declare that those are human beings). It is the kind of segment that may be used for image and video unit. The coordinates are describing a closed shape since the last coordinate of the list will be linked to the first one. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 A list of coordinate defining a closed shape. Last coordinate will be linked to first one. A coordinate is a simple container of two dimensional coordinate aiming at localising information spatially in a mediaUnit; for instance in an image or a video. Those dimensions are explained in pixel, given the fact that it starts at bottom-left with (0;0). Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 Abscissa value in pixel, with 0 at the left border. Ordinate value in pixel, with 0 at the bottom border. A temporal segment is a segment that is described by a start and stop reference in accordance to a millisecond metric. It is the kind of position that may be used for audio and video units. Data Exchange Model for WebLab platform provided by EADS Multimedia package - Version 1.0 - 2008/05 Start value in millisecond. End value in millisecond.