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Subject: Re: [ubl-dev] The announcement of RELAX NG Schema library for UBL 1.0Beta

Kon'nichi-wa Naito-san:

I would add one more requirement to your list if possible.  I would 
think that Relax-NG must also be capable of expressing the same level of 
constraints as W3C Schema (for instance - expressing multiplicity and 
datatype constraints).

This is a very large task you are undertaking.  Thank you for your efforts.

Duane Nickull

Hiroshi Naito wrote:

>Hello ubl-dev,
>Universal Business Language (UBL) is a standard library of XML
>business documents and reusable components for building XML business
>documents developed by the OASIS UBL TC. At The current version (1.0
>beta), UBL's schemas are described with W3C XML Schema (XSD). But it
>is important that the UBL schema design is independent of specific
>Schema language in order to maximize the tools available to
>developers. We are developing the UBL schema library using RELAX NG. 
>The RELAX NG schema library are generated from XSD schemas and
>spreadsheets in UBL 1.0 beta package using Java, Perl, and XSLT.
>When we design RELAX NG schemas, we consider the next things.
>1. The interoperability at XML instances level: An instance document
>which validates against UBL XSD schemas must be validate against UBL
>RELAX NG schemas. And an instance document which fails to validate
>against UBL XSD schemas must fail to validate against UBL RELAX NG
>2. The Structure of XML Schemas: XSD schemas and RELAX NG schemas has
>same file structures and a set of globally-referened components. 
>We also examine schema language dependencies at UBL schema design from
>the next point of view. 
>1. The interoperability at XML instance level. 
>2. The interoperability at XML application level. 
>3. The easy translation to another schema language. 
>4. The reusability of schema. 
>We release RELAX NG schema library for UBL 1.0 beta for public
>(180k bytes) 
>We hope your questions and comments for any kind. 
>Hiroshi Naito, Osaka Institute of Technology <http://www.oit.ac.jp/>

Senior Standards Strategist
Adobe Systems, Inc.

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