XNCL

XML Namespace Catalogue Language(?)

This is just another hack attempt at producing an XML Namespace Catalogue Language that the people on XML-DEV will find solice in.

Abstract

XNCL is a language intended to be used as a de facto dereferencable resource for namespaces.

Details

This specification is an XHTML Family derived from XHTML Basic. It has been modified in the following ways:-

The content model for the link element has been changed so that it may now include div elements
An additional resource element may now be used inside link elements, and they are of content type EMPTY

The prologue of the file is as follows:-

 <!DOCTYPE html PUBLIC "-//Infomesh//DTD XNCL-XHTML Basic 1.0 //EN" 
  "http://infomesh.net/xncl/dtd/">

 <html xmlns="http://www.w3.org/1999/xhtml"
       xmlns:xlink="http://www.w3.org/1999/xlink" 
       xmlns:xncl="http://infomesh.net/xncl/ns/" xml:lang="en" >

LINK

The link element is to be used in the following way:-

@rel: Must be set to meta
@xncl:type: Must be set to nsc (namespace catalogue)
@type: Must be set to the MIME type of the linked schema
@href: A link to the primary defining schema

RESOURCE

@xlink:type: Set to simple
@xlink:href: Contains the URI for the Schema being referenced with regards to the particular arcrole
@xlink:arcrole: This references the normative URI definition for the Schema
@xlink:title: This should be a prose title for the XLINK

Multiple resources's are allowed because of family Schemas, for example, a link to further XHTML may have three types of DTD: Strict, Transitional, Frameset.

Example

<link rel="meta" xncl:type="ncl" type="application/rdf" href="myschema.rdf">
<xncl:resource xlink:type="simple" 
     xlink:href="myschema.rdf"
     xlink:arcrole="http://www.w3.org/2000/01/RDF-Schema"
     xlink:title="RDF Schema" />
</link>

Prose

In the prose description for the Schemas, you should use XPath to refer to the link elements, and hypertext to link to the Schemas.

Sean B. Palmer