I had the same question as you and here are some things I found.
Syntax is parsed by an ELisp module tempo.el. Information:
- terse documentation -- \C-h f tempo-define-template
- some examples (scroll down) 
  http://research.cmis.csiro.au/gjw/emacs/nuggets.html
- tempo manual and more examples http://www.lysator.liu.se/~davidk/elisp/


Yaroslav

The last item is the most comprehensive of the three.

On Fri, 25 Aug 2000, Justin Gordon wrote:

> Can somebody please explain the syntax of these expressions?
> Where are they documented?
> 
> Thanks
> 
> 
> Justin
> 
> > -----Original Message-----
> > From: Per Lindberger [mailto:[EMAIL PROTECTED]]
> > Sent: Friday, August 25, 2000 12:37 PM
> > To: Yaroslav Bulatov
> > Cc: Brad Giaccio; [EMAIL PROTECTED]
> > Subject: Re: Taking spaces out of templates
> > 
> > 
> > I used to be annoyed by the same thing.
> > Reworking the templates as below has made them more useful for me.
> > It ought to be fairly easy to remove the (in)appropriate
> > occurrences of  'n' if you someone should want the braces 
> > placed differently.
> > 
> > Regards,
> > 
> > Per
> > 
> > (jde-set-variables
> >   '(jde-gen-cflow-if
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"if\")" "'(l > \"if (\"
> > (p \"if-clause: \" )\") \" n" "\"{\" > n> r n " "\"} \" >)" ")")))
> >    '(jde-gen-cflow-else
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"else\")" "'(l > \"else
> > \" n" "\"{\" > n> r n" "\"}\" > >)" ")")))
> >    '(jde-gen-cflow-while
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"while\")" "'(l > \"while
> > (\" (p \"while-clause: \" )\") \" n" "\"{\" > n> r n " "\"} 
> > \" >)" ")")))
> >    '(jde-gen-cflow-for
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"for\")" "'(l > \"for (\"
> > (p \"for-clause: \" )\") \" n" "\"{\" > n> r n " "\"} \" >)" ")")))
> >    '(jde-gen-cflow-for-i
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"fori\")" "'(l > \"for
> > (int \" (p \"variable: \" var) \" = 0; \"" "(s var)" "\" < 
> > \"(p \"upper bound: \"
> > ub)\"; \" (s var) \"++) \" n" "\"{\" > n> r n" "\"} \" >)" ")")))
> >    '(jde-gen-cflow-switch
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"switch\")" "'(l >
> > \"switch (\" (p \"switch-condition: \" )\") \" n" "\"{\" > n" 
> > "\"case \" (p
> > \"first value: \") \":\" > n> p n" "\"break;\" > n> p " 
> > "\"default:\" > n> p "
> > "\"break;\" > n" "\"} \" >)" ")")))
> >    '(jde-gen-cflow-case
> >      (quote ("(if (jde-parse-comment-or-quoted-p)" "'(l 
> > \"case\")" "'(l \"case \"
> > (p \"value: \") \":\" > n> p n" "\"break;\" > p)" ")"))))
> > 
> > (tempo-define-template
> >  "plr-tc"
> >  (quote
> >   ("try" > n
> >    "{" > n
> >    > p n
> >    "}" > n
> >    > "catch(" (p "Exception: ") ")" > n
> >    "{" > n
> >    > p n
> >    "}" > p))
> >  nil
> >  "Insert a Java try/catch skeleton")
> > 
> > (tempo-define-template
> >  "plr-tcf"
> >  (quote
> >   ("try" > n
> >    "{" > n
> >    > p > n
> >    "}" > n
> >    > "catch(" (p "Exception: ") ")" > n
> >    "{" > n
> >    > p n
> >    "}" > n
> >    "finally" > n
> >    "{" > n
> >    > p n
> >    "}" > p
> >    ))
> >  nil
> >  "Insert a Java try/catch/finally skeleton")
> > 
> > (define-abbrev global-abbrev-table "tc" "" 'tempo-template-plr-tc 0)
> > (define-abbrev global-abbrev-table "tcf" "" 'tempo-template-plr-tcf 0)
> > 
> > 
> > Yaroslav Bulatov wrote:
> > 
> > > Actually the problem is more complicated. The space that 
> > I'm encountering
> > > is the space that I press that forces the execution of the 
> > template. So I
> > > get something like this `if ( a==0)' if I type `if a==0'... 
> > Same situation
> > > exists for abbreviations. For instance my "pr" abbreviation 
> > linked to
> > > `System.out.println("' actually produces 
> > System.out.println(" test") if I
> > > type `pr test' (instead of System.out.println("test")) I 
> > haven't figured
> > > out the solution to the problem, and if somebody knows Lisp 
> > enough to tell
> > > me how to undo the space that triggers expansion in cflow 
> > templates and/or
> > > in abbreviations, I'll appreciate it.
> > >
> > > Yaroslav
> > >
> > > On Fri, 25 Aug 2000, Brad Giaccio wrote:
> > >
> > > > Try doing M-x customize  jde-gen
> > > > then edit the variables for clfow-if  and any others then 
> > hit save.
> > > >
> > > > Brad
> > > >
> > > > On Fri, Aug 18, 2000 at 06:17:20PM -0700, Yaroslav Bulatov wrote:
> > > > > Here's my problem
> > > > > I need to take out extra inside padding on parenthesis 
> > in control flow
> > > > > templates. (so instead of "if (  )" I want "if ()")  I 
> > looked at code for
> > > > > templates, but since I'm not knowledgeable
> > > > > in lisp, it doesn't make sense to me how to take off 
> > the extra spaces. I'd
> > > > > appreciate if someone could show me how to take out 
> > extra spaces in
> > > > > following template -->
> > > > >
> > > > >  (if (jde-parse-comment-or-quoted-p)
> > > > > '(l "if")
> > > > > '(l '> "if (" (p "if-clause: " clause) ") "
> > > > > (if jde-gen-k&r
> > > > > ()
> > > > > '>'n)
> > > > > "{"'>'n'>'r'n
> > > > > "} // end of if (" (s clause) ")"'>'n'>)
> > > > > )
> > > > >
> > > > > Yaroslav
> > > >
> > > > --
> > > > --- There are two kinds of knowledge, you either know the 
> > answer or
> > > >                       you know where to find it
> > > >                     -Kane, Johnson, and anonymous
> > > >
> > 
> 

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