From achambers.home at googlemail.com  Tue Oct 16 22:22:22 2007
From: achambers.home at googlemail.com (Andy Chambers)
Date: Tue, 16 Oct 2007 23:22:22 +0100
Subject: [s-xml-devel] Webpage example doesn't work
Message-ID: <a70cc98c0710161522k7d68ce66v6e78230d35ca83c9@mail.gmail.com>

Hi,

One of the print-xml examples on the webpage doesn't work for me.

? (print-xml '(p "Interesting stuff at " ((a href
"http://slashdot.org") "SlashDot")))
<P>Interesting stuff at <A HREF="http://slashdot.org">SlashDot</A></P>
NIL

When I try to run the example above, I get

There is no applicable method for the generic function
  #<STANDARD-GENERIC-FUNCTION GET-PREFIX (1)>
when called with arguments
  (NIL).
   [Condition of type SIMPLE-ERROR]

All the other examples work.  It looks to be something to do with the
namespaces stuff that's been added relatively recently but I haven't
been able to figure it out yet.

Cheers,
Andy


From achambers.home at googlemail.com  Tue Oct 16 23:14:01 2007
From: achambers.home at googlemail.com (Andy Chambers)
Date: Wed, 17 Oct 2007 00:14:01 +0100
Subject: [s-xml-devel] Re: Webpage example doesn't work
In-Reply-To: <a70cc98c0710161522k7d68ce66v6e78230d35ca83c9@mail.gmail.com>
References: <a70cc98c0710161522k7d68ce66v6e78230d35ca83c9@mail.gmail.com>
Message-ID: <a70cc98c0710161614h45fd86camb9f46aae905af4c8@mail.gmail.com>

On 10/16/07, I wrote:
> Hi,
>
> One of the print-xml examples on the webpage doesn't work for me.
>
> ? (print-xml '(p "Interesting stuff at " ((a href
> "http://slashdot.org") "SlashDot")))
> <P>Interesting stuff at <A HREF="http://slashdot.org">SlashDot</A></P>
> NIL
>
> When I try to run the example above, I get
>
> There is no applicable method for the generic function
>   #<STANDARD-GENERIC-FUNCTION GET-PREFIX (1)>
> when called with arguments
>   (NIL).
>    [Condition of type SIMPLE-ERROR]
>
> All the other examples work.  It looks to be something to do with the
> namespaces stuff that's been added relatively recently but I haven't
> been able to figure it out yet.

It seems if you define a get-prefix method specializing on NIL, the
example works as expected

(defmethod get-prefix ((namespace (eql nil)))
  "")

While we're on the subject of namespaces, how is this mechanism
supposed to work?  Is there an :sxml syntax for assigning namespaces
to elements?

Cheers,
Andy