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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
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<META name="GENERATOR" content="hevea 1.07">
<META name="Author" content="Luc Maranget">
<TITLE>
Extra Features
</TITLE>
</HEAD>
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<A HREF="manual030.html"><IMG SRC ="previous_motif.gif" ALT="Previous"></A>
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<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#2de52d"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=5><B><A NAME="htoc110">B.16</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=5><B>Extra Features</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE><UL>
<LI><A HREF="manual031.html#toc84">Accents in maths</A>
<LI><A HREF="manual031.html#toc85">TeX macros</A>
<LI><A HREF="manual031.html#toc86">Command Definition inside Command Definition</A>
<LI><A HREF="manual031.html#toc87">Date and time</A>
<LI><A HREF="manual031.html#toc88">Fancy sectioning commands</A>
<LI><A HREF="manual031.html#toc89">H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A as a Back-End for VideoC</A>
</UL>
This section describes H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A functionalities that extends on plain L<sup>A</sup>T<sub>E</sub>X,
as defined in [<CITE><A HREF="manual050.html#latex">L<sup>A</sup>T<sub>E</sub>X</A></CITE>].
Most of the features described here are performed by default.<BR>
<BR>
<A NAME="toc84"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc111">B.16.1</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>Accents in maths</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default122"></A>
Loading the <TT>mathaccents.hva</TT> style files enables
default typesetting of the math
accents commands
(<CODE>\hat</CODE>, <CODE>\tilde</CODE>,...), see Section <A HREF="manual022.html#mathaccents">B.7.4</A>.<BR>
<BR>
<A NAME="toc85"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc112">B.16.2</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>TeX macros</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE><A NAME="texmacro"></A>
Normally, H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A does not recognize constructs that are specific to
TeX.
However, some of the internal commands of H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A are homonymous to
TeX macros, in order to enhance compatibility.
Note that full compatibility with TeX is not guaranteed.<BR>
<BR>
<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#99ff99"><DIV ALIGN=center><TABLE>
<TR><TD><B>B.16.2.1</B></TD>
<TD WIDTH="100%" ALIGN=center><B> la TeX macros definitions</B></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default123"></A><A NAME="@default124"></A>
The <CODE>\def</CODE> construct for defining commands is supported.
It is important to
notice that H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A semantics for <CODE>\def</CODE>
follows TeX semantics.
That is, defining a command that already
exists with <CODE>\def</CODE> succeeds.
This is an important change with respect to previous versions of
H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A, where <CODE>\def</CODE> had the same semantics as
<CODE>\newcommand</CODE>.<BR>
<BR>
Delimiting characters in command definition are supported.
Consider the following example from the TeX Book:
<PRE>
\def\Look{\textsc{Look}}
\def\x{\textsc{x}}
\def\cs AB#1#2C$#3\$ {#3{ab#1}#1 c\x #2}
\cs AB {\Look}{}C${And \$}{look}\$ 5.
</PRE>It yields:
And $lookab<FONT COLOR=navy>LookLook</FONT> c<FONT COLOR=navy>x</FONT>5.<BR>
<BR>
Please note that delimiting characters are supported as far as I
could, problems are likely with delimiting characters which include
spaces or command names, in particular the command name <CODE>\{</CODE>.
One can include <CODE>\{</CODE> in a command argument by using the grouping
characters <CODE>{</CODE>... <CODE>}</CODE>:
<PRE>
\def\frenchquote(#1){~\emph{#1}~ (in French)}
He said \frenchquote(Alors cette accolade ouvrante {``\{''}~?).
</PRE>Yields:
<DIV ALIGN=left>
He said <EM>Alors cette accolade ouvrante ``{'' ?</EM> (in French).
</DIV><BR>
Another source of incompatibilty with TeX is that substitution of
macros parameters is not performed at the same moment by H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A and
TeX.
However, things should go smoothly at the first level of macro
expansion, that is when the delimiters
appear in source code at the same level as the macro that is to
parse them.
For instance, the following source will give different results in
L<sup>A</sup>T<sub>E</sub>X and in H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A:
<PRE>
\def\cs#1A{``#1''}
\def\othercs#1{\cs#1A}
\othercs{coucouA}
</PRE>L<sup>A</sup>T<sub>E</sub>X output is ``coucou''A, while H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A output is ``coucouA''.
Here is H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A output:
``coucouA''
Please note that in most situations this discrepancy will make
H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A crash. <BR>
<BR>
<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#99ff99"><DIV ALIGN=center><TABLE>
<TR><TD><B>B.16.2.2</B></TD>
<TD WIDTH="100%" ALIGN=center><B>The <TT>\let</TT> construct</B></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default125"></A>H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A also processes a
limited version of <CODE>\let</CODE>:
<DIV ALIGN=left>
<CODE>\let</CODE> <I>macro-name1</I> = <I>macro-name2</I>
</DIV>
The effect is to bind <I>macro-name1</I> to whatever <I>macro-name2</I>
is bound to at the time <CODE>\let</CODE> is processed. This construct may
prove very useful in situations where
one whishes to slightly modify basic commands.
See sections <A HREF="manual013.html#customize-let">9.3</A> and <A HREF="manual017.html#exlet">B.2</A> for examples of using
<CODE>\let</CODE> in such a situation.<BR>
<BR>
<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#99ff99"><DIV ALIGN=center><TABLE>
<TR><TD><B>B.16.2.3</B></TD>
<TD WIDTH="100%" ALIGN=center><B>The <TT>\global</TT> construct</B></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default126"></A>
It is possible to escape scope and to make global definitions
and bindings by using the TeX construct <CODE>\global</CODE>.
The <CODE>\global</CODE> construct is significant before
<CODE>\def</CODE> and <CODE>\let</CODE> constructs.<BR>
<BR>
<A NAME="@default127"></A>
Also note that <CODE>\gdef</CODE> is equivalent to <CODE>\global\def</CODE>.<BR>
<BR>
<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#99ff99"><DIV ALIGN=center><TABLE>
<TR><TD><B>B.16.2.4</B></TD>
<TD WIDTH="100%" ALIGN=center><B>TeX Conditional Macros</B></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE><A NAME="texcond"></A>
<A NAME="@default128"></A><A NAME="@default129"></A><A NAME="@default130"></A><A NAME="@default131"></A>
The <CODE>\newif\if</CODE><I>name</I>, where <I>name</I> is made of letters
only, creates three macros:
<CODE>\if</CODE><I>name</I>, <CODE>\</CODE><I>name</I><CODE>true</CODE> and
<CODE>\</CODE><I>name</I><CODE>false</CODE>.
The latter two set the <I>name</I> condition to <I>true</I> and
<I>false</I>, respectively.
The <CODE>\if</CODE><I>name</I> command tests the condition <I>name</I>:
<DIV ALIGN=left>
<CODE>\if</CODE><I>name<BR>
text<FONT SIZE=2><SUB>1</SUB></FONT></I><BR>
<CODE>\else</CODE><BR>
<I>text<FONT SIZE=2><SUB>2</SUB></FONT></I><BR>
<CODE>\fi</CODE><BR>
</DIV>
Text <I>text<FONT SIZE=2><SUB>1</SUB></FONT></I> is processed when <I>name</I> is
<I>true</I>, otherwise <I>text<FONT SIZE=2><SUB>2</SUB></FONT></I> is processed.
If <I>text<FONT SIZE=2><SUB>2</SUB></FONT></I> is empty, then the <CODE>\else</CODE> keyword can be
omitted.<BR>
<BR>
Note that H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A also implements L<sup>A</sup>T<sub>E</sub>X <TT>ifthen</TT> package
and that TeX simple conditional macros are fully compatible with
L<sup>A</sup>T<sub>E</sub>X boolean registers. More precisely,
we have the following correspondences:
<DIV ALIGN=center>
<TABLE CELLSPACING=2 CELLPADDING=0>
<TR><TD ALIGN=center NOWRAP COLSPAN=2>TeX</TD>
<TD ALIGN=center NOWRAP>L<sup>A</sup>T<sub>E</sub>X</TD>
</TR>
<TR><TD BGCOLOR=black COLSPAN=3><TABLE BORDER=0 WIDTH="100%" CELLSPACING=0 CELLPADDING=1><TR><TD></TD></TR></TABLE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left><CODE>\newif\if</CODE><I>name</I></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left><CODE>\newboolean{</CODE><I>name</I><CODE>}</CODE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left><CODE>\</CODE><I>name</I><CODE>true</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left><CODE>\setboolean{</CODE><I>name</I><CODE>}{true}</CODE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left><CODE>\</CODE><I>name</I><CODE>false</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left><CODE>\setboolean{</CODE><I>name</I><CODE>}{false}</CODE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left><CODE>\if</CODE><I>name text<FONT SIZE=2><SUB>1</SUB></FONT></I><CODE>\else</CODE>
<I>text<FONT SIZE=2><SUB>2</SUB></FONT></I><CODE>\fi</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left><CODE>\ifthenelse{\boolean{</CODE><I>name</I><CODE>}}{</CODE><I>text<FONT SIZE=2><SUB>1</SUB></FONT></I><CODE>}{</CODE><I>text<FONT SIZE=2><SUB>2</SUB></FONT></I><CODE>}</CODE></TD>
</TR></TABLE>
</DIV><BR>
<TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#99ff99"><DIV ALIGN=center><TABLE>
<TR><TD><B>B.16.2.5</B></TD>
<TD WIDTH="100%" ALIGN=center><B>Other TeX Macros</B></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A implements the macros <CODE>\unskip</CODE> and <CODE>\endinput</CODE>.
It also supports the <CODE>\csname</CODE>... <CODE>\endcsname</CODE>
construct.<BR>
<BR>
<A NAME="toc86"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc113">B.16.3</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>Command Definition inside Command Definition</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default132"></A><A NAME="@default133"></A>
If one strictly follows the L<sup>A</sup>T<sub>E</sub>X manual, only commands with no
arguments can be defined inside other commands.
Parameters (i.e., <CODE>#</CODE><I>n</I>) occurring inside command bodies
refer to the outer definition, even when they appear in nested
command definitions.
That is, the following source:
<PRE>
\newcommand{\outercom}[1]{\newcommand{\insidecom}{#1}\insidecom}
\outercom{outer}
</PRE>yields this output:
<DIV ALIGN=center>
outer
</DIV><BR>
Nevertheless, nested commands with arguments are allowed.
Standard parameters <CODE>#</CODE><I>n</I> still refer to the outer
definition, while nested parameters <CODE>##</CODE><I>n</I> refer to the
inner definition.
That is, the source:
<PRE>
\newcommand{\outercom}[1]{\newcommand{\insidecom}[1]{##1}\insidecom{inner}}
\outercom{outer}
</PRE>yields this output:
<DIV ALIGN=center>
inner
</DIV><BR>
<A NAME="toc87"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc114">B.16.4</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>Date and time</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default134"></A><A NAME="@default135"></A>
Date and time support is not enabled by default, for portability and
simplicity reasons.<BR>
<BR>
However, H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A source distribution includes a simple (<TT>sh</TT>)
shell script
<TT>xxdate.exe</TT> that activates date and time support.
The <TT>hevea</TT> command, should be invoked as :
<PRE>
# hevea -exec xxdate.exe ...
</PRE>This will execute the script <TT>xxdate.exe</TT>, whose output is then
read by H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A.
As a consequence, standard L<sup>A</sup>T<sub>E</sub>X counters <CODE>year</CODE>,
<CODE>month</CODE>, <CODE>day</CODE> and
<CODE>\ime</CODE> are defined and
L<sup>A</sup>T<sub>E</sub>X command <CODE>\today</CODE> works properly.
<A NAME="@default136"></A>
Additionnally the following counters and commands are defined :
<DIV ALIGN=center>
<TABLE CELLSPACING=2 CELLPADDING=0>
<TR><TD VALIGN=top ALIGN=left NOWRAP> </TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
</TR>
<TR><TD BGCOLOR=black COLSPAN=3><TABLE BORDER=0 WIDTH="100%" CELLSPACING=0 CELLPADDING=1><TR><TD></TD></TR></TABLE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Counter <TT>weekday</TT></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>day of week, 0...6
(e.g. 4)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Counter <TT>Hour</TT></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>hour, 00...11
(e.g. 02)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Counter <TT>hour</TT></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>hour, 00...23 (e.g. 14)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Counter <TT>minute</TT></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>minute, 00...59
(e.g. 15)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Counter <TT>second</TT></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>second, 00...61<SUP><A NAME="text2" HREF="#note2">1</A></SUP>(e.g. 43)</TD>
</TR>
<TR><TD BGCOLOR=black COLSPAN=3><TABLE BORDER=0 WIDTH="100%" CELLSPACING=0 CELLPADDING=1><TR><TD></TD></TR></TABLE></TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Command <CODE>\ampm</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>AM or PM
(e.g. PM)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Command <CODE>\timezone</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>Time zone
(e.g. CEST)</TD>
</TR>
<TR><TD VALIGN=top ALIGN=left NOWRAP>Command <CODE>\heveadate</CODE></TD>
<TD VALIGN=top ALIGN=center NOWRAP> </TD>
<TD VALIGN=top ALIGN=left>Output of the ``<TT>date</TT>'' Unix
command, (e.g. jeu oct 2 14:15:43 CEST 2003)</TD>
</TR>
<TR><TD BGCOLOR=black COLSPAN=3><TABLE BORDER=0 WIDTH="100%" CELLSPACING=0 CELLPADDING=1><TR><TD></TD></TR></TABLE></TD>
</TR></TABLE>
</DIV><BR>
Note that I choosed to add an extra option (and not an extra
``<CODE>\@exec</CODE>'' primitive) for security reasons. You certainly do
not want to enable H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A to execute silently an arbitrary program
without being conscious of that fact.
Moreover, the <TT>hevea</TT> program does not execute
<TT>xxdate.exe</TT> by default since it is difficult to write such
a script in a portable manner.<BR>
<BR>
Windows users should enjoy the same features with the version of
<TT>xxdate.exe</TT> included in the Win32 distribution. <BR>
<BR>
<A NAME="toc88"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc115">B.16.5</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>Fancy sectioning commands</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
<A NAME="@default137"></A>
Loading the <TT>fancysection.hva</TT> file will radically change the
style of sectionnal units headers: they appear over a green
backgroud, the backgrould color saturation decreases as the sectioning
commands themselves do (this is the style of this manual).
Additionnaly, the document background color is white.<BR>
<BR>
The <TT>fancysection.hva</TT> file is intended to be loaded after
the document base style. Thus, to use fancy section style in
<TT>doc.tex</TT> whose base style is <I>article</I>
you should issue the command:
<PRE>
# hevea article.hva fancysection.hva doc.tex
</PRE>You can also make a <TT>doc.hva</TT> file that contains the two lines:
<PRE>
\input{article.hva}
\input{fancysection.hva}
</PRE>And then launch <TT>hevea</TT> as:
<PRE>
# hevea doc.hva doc.tex
</PRE>
Sectioning command background colors can be changed by
redefining the corresponding colors (<TT>part</TT>, <TT>chapter</TT>,
<TT>section</TT>,...).
For instance, you get various mixes of red and orange by:
<PRE>
\input{article.hva}
\input{fancysection.hva}
\definecolor{part}{named}{BrickRed}
\definecolor{section}{named}{RedOrange}
\definecolor{subsection}{named}{BurntOrange}
</PRE>(See section <A HREF="manual029.html#color:package">B.14.2</A> for details on the <TT>named</TT>
color model that is used above.)<BR>
<BR>
<A NAME="@default138"></A>
Another choice is issuing the command
<CODE>\colorsections{</CODE><I>hue</I><CODE>}</CODE>, where
<I>hue</I> is a hue value to be interpreted in the HSV model.
For instance,
<PRE>
\input{article.hva}
\input{fancysection.hva}
\colorsections{20}
</PRE>will yield sectionnal headers on a red-orange background.<BR>
<BR>
<A NAME="toc89"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
<TR><TD BGCOLOR="#66ff66"><DIV ALIGN=center><TABLE>
<TR><TD><FONT SIZE=4><B><A NAME="htoc116">B.16.6</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>H<FONT SIZE=3><sup>E</sup></FONT>V<FONT SIZE=3><sup>E</sup></FONT>A as a Back-End for VideoC</B></FONT></TD>
</TR></TABLE></DIV></TD>
</TR></TABLE>
H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A is one of the back-ends of the VideoC system for producing
educational CDROM to teach programming languages.
VideoC author is Christian Queinnec and the documentation is available
at:
<DIV ALIGN=center>
<TT><A HREF="http://www-spi.lip6.fr/~queinnec/VideoC/VideoC.html">http://www-spi.lip6.fr/~queinnec/VideoC/VideoC.html</A></TT>.
</DIV><BR>
VideoC translates L<sup>A</sup>T<sub>E</sub>X source into a variety of formats, including
HTML. VideoC source may contain some special constructs for
typesetting source code or to annotate text in sophisticated ways.
H<FONT SIZE=2><sup>E</sup></FONT>V<FONT SIZE=2><sup>E</sup></FONT>A internal engine implements some of the core constructs needed
by VideoC. The rest of VideoC constructs are implemented by
the <TT>.hva</TT> files from VideoC distribution.<BR>
<BR>
<HR WIDTH="50%" SIZE=1><DL><DT><FONT SIZE=5><A NAME="note2" HREF="#text2">1</A></FONT><DD>According to
<TT>date</TT> man page.
</DL>
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