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DocBook 5: The Definitive Guide by Richard L. Hamilton, Norman Walsh

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Name

imageobjectco — A wrapper for an image object with callouts

Synopsis

imageobjectco ::= (infodb.titleforbidden.info, areaspec, imageobject+, calloutlist*)

Description

The use of callouts, such as numbered bullets, provides an annotation mechanism. In an online system, these bullets are frequently hot and clicking on them navigates to the corresponding annotation.

An imageobjectco is a wrapper around an areaspec and a set of alternative imageobjects. More than one imageobject may be provided (just as more than one media object may occur inside mediaobject), but they must share exactly the same callout coordinates and exactly one must be selected by the processing system. (Use multiple imageobjectco elements inside a mediaobject to provide alternatives with different callout coordinates.)

An areaspec identifies the locations (coordinates) on the image where the callouts occur. The imageobjectco may also contain the list of annotations in a calloutlist, although the calloutlist may also occur outside the wrapper, elsewhere in the document.

Processing expectations

Formatted as a displayed block. It may not be rendered at all, depending on its placement within the mediaobject that contains it and the constraints on the publishing system. For a more detailed description of the semantics involved, see mediaobject.

The mandatory processing expectations of an imageobjectco are minimal: a processor is expected to render the ...

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