Re: [xtm-wg] Correct use of published subjects

[Murray Altheim <murray.altheim@sun.com>]

Lars Marius Garshol wrote:
> 
> * Murray Altheim
> |
> | As I mentioned previously, the set of PSIs established by the
> | existing language.xtm and country.xtm work completely well as PSIs,
> | even if there are perceived errors in the topic map itself. There is
> | no emergency here; we can wait six weeks. The xml:base problem you
> | cite is simply a matter of Lars Marius misunderstanding the xml:base
> | specification,
> 
> If that's the case it would be great, since it would mean that this
> particular problem is a tiny one of some people possibly being
> mislead, rather than the rather major one it seems to be at the moment
> (from my point of view).
> 
> There are two issues here:
> 
>  a) what is the URI of an element with an ID attribute in the presence
>     of an xml:base attribute?

It's the URI to the document (as modified by xml:base) plus the fragment ID.

>  b) what is the URI in an xlink:href attribute in the presence of an
>     xml:base attribute?

It's the URI (as modified by xml:base). These aren't exactly tautologies.

As I've now said on several occasions, these are both answered quite 
explicitly by the xml:base Recommendation. I would think that if the
entire W3C XML Linking WG and then the entire W3C community were able
to make sense enough of the xml:base spec to allow it to reach 
Recommendation, that perhaps there is something wrong with it, but 
that seems extremely unlikely given that this is essentially a one page
spec. You make an awful fuss over something that seems so explicitly
clear. If you look at the example markup in Section 3:

  http://www.w3.org/TR/xmlbase/#syntax

you'll find a number of examples, any one of which should make it
clear. The URI reference to use in any situation is the combination 
of the base URI for a document plus the fragment identifier. The
base URI of the document is composed of its path plus its file
name. If xml:base supplies the path (as is the case in the XTM
files you cite), then one appends the filename and any fragment 
identifier. 

In our case, 

  path:       http://www.topicmaps.org/xtm/1.0/
  filename:   country.xtm
  id:         #en

  PSI:        http://www.topicmaps.org/xtm/1.0/ + country.xtm + #en

Your idea of http://www.topicmaps.org/xtm/1.0/#en doesn't really
make much sense. The file name is missing. 

I don't know why you have difficulty with this, why it is such a 
burning issue. It's in the xml:base Recommendation, it's been discussed
by the XML Linking WG ad nauseum for the past two years, and we've
had it in our spec since December. If you really think I'm wrong,
I'd suggest bringing it up with the W3C Linking WG. I didn't invent
this, I'm just following the spec, which has the same functionality
that's been in HTML's <base> since HTML 2.0. And the example in the 
xml:base spec seems to make whatever possible confusion you might have
pretty clear.

Murray

...........................................................................
Murray Altheim                         <mailto:murray.altheim&#x40;sun.com>
XML Technology Center
Sun Microsystems, Inc., MS MPK17-102, 1601 Willow Rd., Menlo Park, CA 94025

      In the evening
      The rice leaves in the garden
      Rustle in the autumn wind
      That blows through my reed hut.  -- Minamoto no Tsunenobu

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