Does merge of two schema require rewriting of existing code?

"gavenkoa" <[email protected]> Mon, 31 Jan 2011 08:42:56 -0000
Newsgroups	gmane.emacs.nxml.general
Message-ID	<[email protected]>
Sorry, this message may be some offtopic for this list.

I try write compact RELAX NG schema for Blogger template. Look at used
namespaces:

<html dir='ltr'
      xmlns='http://www.w3.org/1999/xhtml'
      xmlns:b='http://www.google.com/2005/gml/b'
      xmlns:data='http://www.google.com/2005/gml/data'
      xmlns:expr='http://www.google.com/2005/gml/expr'>

As Emacs 23.2 already have 'xhtml.rnc' file for 'http://www.w3.org/1999/xhtml'
I try reuse them. I think that only need write rules for Google namespace and
merge them.

If anyone interesting how look target .xml file visit link:

  http://code.google.com/p/brain-break-blog/source/browse/gavenkoa-exp.blogspot.com.xml

But I get difficult in merging new schema into existing. For example target
xml contain this code:

  <title><data:blog.pageTitle/></title>

This code from 'xhtml-struct.rnc':

  title = element title { title.attlist, text }

As I understand RELAX NG upper rule don't allow me integrate:

  gml-data.blog.pageTitle = element blog.pageTitle {empty}

into it to become:

  title = element title {
     title.attlist
   & text*
   & gml-data.blog.pageTitle*
  }

Does I need make own 'xhtml.rnc' to allow merge into it new syntax?

In "RELAX NG Compact Syntax Tutorial" for extensibility used such pattern:

  inline =
    (text
     | element bold { inline }
     | element italic { inline }
     | inline.extra)*
  inline.extra = notAllowed

which I can not found in 'xhtml*.rnc' files.

What you recommend?



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