Description of and pointer to an external file containing a still image.
Any combination of:
Accessibility Elements
<alt-text> Alternate Title Text For a Figure, Etc.
<long-desc> Long Description
<abstract> Abstract
External Linking Elements
<email> Email Address
<ext-link> External Link
<uri> Uniform Resource Identifier (URI)
<caption> Caption of a Figure, Table, Etc.
<object-id> Object Identifier
<kwd-group> Keyword Group
<label> Label of a Figure, Reference, Etc.
Ownership Elements
<attrib> Attribution
<permissions> Permissions