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Index: T h

⟦ce1609237⟧ TextFile

    Length: 1799 (0x707)
    Types: TextFile
    Names: »helpfile«

Derivation

└─⟦52210d11f⟧ Bits:30007239 EUUGD2: TeX 3 1992-12
    └─⟦c319c2751⟧ »unix3.0/TeX3.0.tar.Z« 
        └─⟦036c765ac⟧ 
            └─⟦this⟧ »TeX3.0/TeXcontrib/gnutex/Help/helpfile« 

TextFile

?topic
This line is printed when the user wants help on "topic".
?
??
Help is available on:

    alias    keyword    subject    topic    last-subject
    spaces work         space

Since there is a null keyword for this line, this section is printed when the
user wants general help (when a help keyword isn't given).  A command summary
is usually here.  Notice that the null keyword is equivalent to a "?"  keyword
here, because of the '?' and '??' keyword lines above.
?keyword
?Keyword
?KEYWORD
These lines will be printed on the screen if the user wanted help on
"keyword", "Keyword", or "KEYWORD".  No casefolding is done on the keywords.
?subject
?alias
This line is printed for help on "subject" and "alias".
?spaces work
?spaces
?work
Note that spaces are okay in keywords.  This allows you to set up an
entry for, say, "open usage".  Then when someone types an unrecognized
argument to the `open' command, you can make a call like:

	help("open usage", helpfilename);

so it looks like you have a usage message in your program, whereas you
really are still using the help file.
? 
? That previous line was just a space, like this line is a comment.
?space
You can even get help on just a space, although keywording invisible
characters could prove confusing to your users.  Note that "comments"
are really just very long keyword entries, above.  It's unlikely that
anyone would ask for help on " That previous line was just a space,
like this line is a comment."
?revision
@(#)	1.1   87/07/23
?last-subject
Note that help sections are terminated by the start of the next '?' entry or
by EOF.  So you can't have a leading '?' on a line of any help section.  You
can re-define the magic character to recognize in column 1, though, if '?' is
too useful.  (I suggest ^A in such extreme cases.)