textobject — A wrapper for a text description of an object and its associated meta-information
textobject ::= (
TextObject is a wrapper containing a textual description
of a media object, and its associated meta-information.
TextObjects are only allowed in
a fall-back option, they cannot be the primary content.
There are two different forms of
TextObject, and it is
not unreasonable for a media object to contain both of them.
In the first form, the content of a
Phrase. This form is a mechanism for
providing a simple “alt text” for a media object. The
phrase might be used, for example, as the value of the
ALT attribute on an HTML
with the primary content of the image coming from one of the other
objects in the media object.
In the second form, the content of
TextObject is a longer,
prose description. This form could be used when rendering to devices
that are incapable of displaying any of the other alternatives.
May be formatted inline or as a displayed block, depending on context. It might not be rendered at all, depending on its placement
the constraints on the publishing system. For a more detailed description
of the semantics involved, see
The following elements occur in textobject: