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############################################################
# @(#) Special commands, Dirk Hagedorn, 1996/04/17
############################################################
!subsubnode Special commands
UDO offers you two commands and an environment for every destination
format that you can use to insert special commands for this format. So
you are able to insert small passages or huge blocks written in the
destination format (like special tables for (!LaTeX) or HTML).
You have to use abbreviations of the destination formates if you want
to use these special commands:
!include syntax/misc/_dest.ui
For every destination format UDO offers a command to insert a line
with commands for the current destination format, and a command to
insert a line for all different formats. The commands are built by a
''!'' and the abbreviations or ''!/='' plus the abbreviation.
The next example shows how to insert a line that will only be printed
for the ASCII format:
!begin_quote
!begin_verbatim
!asc This line appears only in ASCII.
!end_verbatim
!end_quote
The next example shows how to insert a line that appears in all formats
except ASCII:
!begin_quote
!begin_verbatim
!=asc This line doesn't appear in ASCII.
!end_verbatim
!end_quote
The contents of the line will be printed without the command and
without converting the text of the line. These commands split up text
into different paragraphs like all the other UDO commands. So these
commands aren't useful to insert a line into a paragraph!
You can use these commands to insert special commands like parts of
the preamble for (!LaTeX):
!begin_quote
!begin_verbatim
!tex \documentstyle[11pt,makeidx]{article}
!tex \makeindex
[...]
!tex \printindex
!end_verbatim
!end_quote
!label raw environment
!subsubheading The raw environment
But it happens that you want to insert large passages only for one
format with special commands. You could add one of the upper commands
at the beginning of each line, sure. But to make it easier for you to insert
these passages UDO has a special environment for this case: the raw
environment.
Together with the possibility to check the current destination format you
can e.g. insert complex tables for (!LaTeX) or forms for HTML with the raw
environment. The following example shows how to enter HTML forms to your
source code:
!index HTML !! <FORM>
!index <FORM>
!begin_quote
!begin_verbatim
!ifdest [html]
!begin_raw
<FORM method=post action="mailto:DirkHage@aol.com">
<PRE>
<p> Name: <INPUT name="Name" size=60>
<p>
<p> <INPUT type=submit value="Send">
<p> <INPUT type=reset value="Reset">
</PRE>
</FORM>
!end_raw
!else
The HTML version will display a form here.
!endif
!end_verbatim
!end_quote
To say it once more: Text that is part of a raw environment is printed ""as
is"". That means that it's not converted and not indented. If you will
insert the upper form source code into a verbatim environment you will
see the source code in an HTML browser. But if you insert it inside a raw
environment you will see the form!
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