$Revision: 1.3 $
$Date: 2002/06/12 11:18:34 $
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 annotation.
A ScreenCO is a wrapper around an AreaSpec and a Screen. An AreaSpec identifies the locations (coordinates) in the Screen where the callouts occur. The ScreenCO may also contain the list of annotations in a CalloutList, although the CalloutList may also occur outside of the wrapper, elsewhere in the document.
It is also possible to embed CO elements directly in the verbatim text, in order to avoid the overhead of calculating the correct coordinates. If you decide to follow this route, use a Screen and a CalloutList without the ScreenCO wrapper. A ScreenCO must specify at least one coordinate.
For a complete description of callouts, see Callout.
Formatted as a displayed block. This element is displayed “verbatim”; whitespace and linebreaks 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.
In online environments, the processing system may be able to instantiate the linking relationships between the callout marks in the program listing and the annotations. Some systems may even be able to go a step further and generate the callout marks automatically from the coordinate information, but this level of sophistication is not mandatory.
These elements contain screenco: answer, appendix, article, bibliodiv, bibliography, blockquote, callout, caption, caution, chapter, colophon, constraintdef, dedication, entry, example, figure, footnote, glossary, glossdef, glossdiv, important, index, indexdiv, informalexample, informalfigure, itemizedlist, legalnotice, listitem, msgexplan, msgtext, note, orderedlist, para, partintro, preface, procedure, qandadiv, qandaset, question, refsect1, refsect2, refsect3, refsection, refsynopsisdiv, revdescription, sect1, sect2, sect3, sect4, sect5, section, setindex, sidebar, simplesect, step, textobject, tip, variablelist, warning.
<!DOCTYPE informalexample PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <informalexample> <screen> Volume in drive C is SYSTEM Serial number is 2350:717C Directory of C:\ 10/17/97 9:04 <DIR> bin 10/16/97 14:11 <DIR> DOS <co id="dos"/> 10/16/97 14:40 <DIR> Program Files 10/16/97 14:46 <DIR> TEMP 10/17/97 9:04 <DIR> tmp 10/16/97 14:37 <DIR> WINNT 10/16/97 14:25 119 AUTOEXEC.BAT <co id="autoexec.bat"/> 2/13/94 6:21 54,619 COMMAND.COM <co id="command.com"/> 10/16/97 14:25 115 CONFIG.SYS <co id="config.sys"/> 11/16/97 17:17 61,865,984 pagefile.sys 2/13/94 6:21 9,349 WINA20.386 <co id="wina20.386"/> </screen> <calloutlist> <callout arearefs="dos"> <para> This directory holds <trademark>MS-DOS</trademark>, the operating system that was installed before <trademark>Windows NT</trademark>. </para> </callout> <callout arearefs="autoexec.bat command.com config.sys"> <para> System startup code for DOS. </para> </callout> <callout arearefs="wina20.386"> <para> Some sort of <trademark>Windows 3.1</trademark> hack for some 386 processors, as I recall. </para> </callout> </calloutlist> </informalexample>
Volume in drive C is SYSTEM Serial number is 2350:717C Directory of C:\ 10/17/97 9:04 <DIR> bin 10/16/97 14:11 <DIR> DOS 10/16/97 14:40 <DIR> Program Files 10/16/97 14:46 <DIR> TEMP 10/17/97 9:04 <DIR> tmp 10/16/97 14:37 <DIR> WINNT 10/16/97 14:25 119 AUTOEXEC.BAT 2/13/94 6:21 54,619 COMMAND.COM 10/16/97 14:25 115 CONFIG.SYS 11/16/97 17:17 61,865,984 pagefile.sys 2/13/94 6:21 9,349 WINA20.386