screenco — A screen with associated areas used in callouts
callouts, such as numbered bullets, are an
annotation mechanism. In an online system, these bullets are frequently
“hot,” and clicking on them navigates to the corresponding
screenco is a wrapper around an
areaspec and a
areaspec identifies the locations (coordinates) in
screen where the callouts occur. The
screenco may also contain the list of annotations in
calloutlist, although the
calloutlist may also occur outside of the wrapper,
elsewhere in the document.
It is also possible to embed
directly in the verbatim text, in order to avoid the overhead of
calculating the correct coordinates. If you decide to follow this route,
screen and a
screenco wrapper. A
screenco must specify at least one coordinate.
For a complete description of callouts, see
Formatted as a displayed block. This element is displayed “verbatim”; whitespace and line breaks within this element are significant.
The mandatory processing expectations of a
screenco are minimal: a system is expected to
render the program listing and the callout list, if present.
co elements are embedded in a
screen, they must generate appropriate callout
In online environments, the processing system ...