[sc34wg3] CTM block syntax vs. TMQL embedded expressions

[Robert Barta]

On Tue, Jan 29, 2008 at 09:21:37AM +0900, Jaeho Lee wrote:
> IMHO, I think the priority should be given to CTM when it comes to decide
> who takes the precious "{ }" symbols.

Why? There was good reason for the {} in TMQL, with all the heritage
coming from XQuery.

And {} is perfect (well, familar) for deep nesting. Where is deep
nesting in CTM?

\rho

> -----Original Message-----
> From: sc34wg3-bounces at isotopicmaps.org
> [mailto:sc34wg3-bounces at isotopicmaps.org] On Behalf Of Lars Heuer
> Sent: Tuesday, January 29, 2008 2:22 AM
> To: Discussion of ISO/IEC 13250 Topic Maps
> Subject: [sc34wg3] CTM block syntax vs. TMQL embedded expressions
> 
> Hi all,
> 
> I wonder how nicely the proposed {}-syntax plays with TMQL-expressions
> within CTM.
> 
> Here an example from the tutorial I found at
> <http://kill.devc.at/system/files/language.html#id2482915>
> 
>        for $p in // person
>        where
>           has-composed (composer: $p, opus: $_)
>        return """
>               { $p }   # this copies the whole topic verbatim
> 
>               {fn:id ($p)} isa composer
>        """
> 
> 
> If I try to translate it into the new and shiny block syntax I get:
> 
> 
>        for $p in // person
>        where
>           has-composed (composer: $p, opus: $_)
>        return """
>               { $p }   # this copies the whole topic verbatim
> 
>               {fn:id($p)} \{ isa composer; \}
>        """
> 
> I think, you have to escape the CTM "{" "}" everywhere otherwise the
> TMQL-processor interprets it as embedded expression. Note, that this
> is a very simple example.
> 
> Maybe the TMQL-editors can verify it.
> 
> Best regards,
> Lars
> --
> http://www.semagia.com
> 
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