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Re: mixing it up: REST+XML Namespaces + XLST

Subject: Re: mixing it up: REST+XML Namespaces + XLST
From: "M. David Peterson" <m.david.x2x2x@xxxxxxxxx>
Date: Mon, 18 Apr 2005 16:38:58 -0700
rest xml example
This is GREAT Jim!  I am doing a TON of work with this type of thing
right now, near identical in many ways to the way you are doing
things.  It is my belief that namespaces are the single most important
part of integrated XML software development, but that obviously no
revelation.  Coupled with mime types I believe they are the foundation
of what I believe to be the next "trend" in weblication software
development, that of the merging together of the WWW with the desktop,
coupled together via a continued push towards a grid-like
infrastructure in which the line between client and server becomes
completely transparent and in many ways will not even exist at all.
But again, nothing revealing in any of this...  Obviously there are a
lot of us who are gravitating towards all of this and have been for
quite some time.  But it is certainly exciting and I am definitely
looking forward to being a part of all of this!

Cheers :)

<M:D/>

On 4/18/05, James Fuller <jim.fuller@xxxxxxxxxxxxxx> wrote:
> let me preface the following that I have no burning desire to *put*
> something that means something within an XML namespace URI...though was
> wondering of any variations on the following theme exist out there in
> the wild.
>
> for this simple illustration, I will just talk about HTTP GET and none
> of the other CRUD operations that map to REST
>
> take for example take a simple REST interface to a database with a few
> tables;
>
> http://www.example.org/app/tables/company
> http://www.example.org/app/tables/user
> http://www.example.org/app/tables/products
>
> performing a GET on top level URL http://www.example.org/app/tables returns
>
> <tables>
> <user xmlns="http://www.example.org/app/tables/user"/>
> <company xmlns="http://www.example.org/app/tables/company"/>
> <products xmlns="http://www.example.org/app/tables/products"/>
> </tables>
>
> note, I have bastardized REST by eschewing with xlink:href (was just
> transforming them into other things in any event) and defining namespaces.
>
> performing GET on these URL's will return XML with a list of records,
>
> <records>
>    <company xmlns="http://www.example.org/app/tables/company">1</company>
> </records>
>
> sending a GET  for http://www.example.org/app/tables/company/1/ would in
> turn return XML data about the com
>
> <row xmlns="http://www.example.org/app/tables/company" xml:ID="1">
> <uid>1</uid>
> <name>My Company</name>
> <phone>wou 55</phone>
> <email>jim.fuller@xxxxxxxxxxxxxx</email>
> </row>
>
> note: I have used xml:ID to identify because I have written a bit of
> code to handle such things.
>
> so I now find myself doing things like defining namespaces for use in
> XSLT (though we dont have to explicitly define them, necc);
>
> xmlns:company="http://www.example.org/app/tables/company"
>
> xmlns:products="http://www.example.org/app/tables/products"
>
> xmlns:user="http://www.example.org/app/tables/user"
>
> then with the various fn:namespace functions e.g.
> fn:namespace-uri,fn:namespace-uri-for-prefix,fn:namespace-uri-from-QName
> I can now infer access these resources with document() calls.
>
> <xsl:variable name="company" select="document(fn:namespace-uri(.))"/>
>
> by being able to consume the record lists its easy to create detail
> level document() calls...also if your data has regular id
> sequences...its now easy with ranges and such to just append the id
> number to document() call.
>
> With every document() call I recieve xml with relevent namespaces which
> point to their REST implementation...it feels very state like to me,
> being passed a namespace which contains its REST URI
> implementation....would like to hear if anyone else is using XML
> namespace to their own ends ?
>
> cheers, Jim Fuller
>
>


--
<M:D/>

:: M. David Peterson ::
XML & XML Transformations, C#, .NET, and Functional Languages Specialist

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