screenco
screenco — A screen with associated areas used in callouts
Description
Callout
s, 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
.
Processing expectations
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.
If explicit CO
elements are embedded in a Screen
, they must generate appropriate callout marks.
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.
Parents
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
, taskprerequisites
, taskrelated
, tasksummary
, td
, textobject
, th
, tip
, variablelist
, warning
.
Children
The following elements occur in screenco: areaspec
, calloutlist
, screen
.
See Also
areaspec
, calloutlist
, co
, coref
, graphicco
, imageobjectco
, mediaobjectco
, programlistingco
.
Examples
<!DOCTYPE screenco PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<screenco>
<areaspec>
<area id="dos" coords='5'/>
<area id="autoexec.bat" coords='10'/>
<area id="command.com" coords='11'/>
<area id="config.sys" coords='12'/>
<area id="wina20.386" coords='14'/>
</areaspec>
<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
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</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>
</screenco>
Volume in drive C is SYSTEM Serial number is 2350:717C
Directory of C:<br />
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