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Re: ACTION ITEM: second rework of general section about extending/customizing schemas (http://www.w3.org/International/its/track/actions/1)

From: Felix Sasaki <fsasaki@w3.org>
Date: Fri, 28 Sep 2007 21:29:32 +0900
Message-ID: <46FCF3AC.4030505@w3.org>
To: "Lieske, Christian" <christian.lieske@sap.com>
CC: public-i18n-its@w3.org

Hi Christian,

I'm fine with the NEW additions. Just some more comments below.

Lieske, Christian wrote:
> Hi there,
> Here's a second modified version of the draft (see the "NEW>" stuff). The modifications should address
> the input from Felix and Jirka. Please note, that we still need to find the material
> for the "additional references".

sorry, not here yet.

> Cheers,
> Christian
> ===
> The "How to do this" parts of this document often contain statements related
> to schema creation or modification. The statements pertain to one of the
> following state-of-affairs:
> 1. creating a new schema
> 2. modifying an existing schema 
> The following aspects may need to be taken into account when working on both
> of these topics:
> 1. Think twice before creating your own schema. Consider strongly existing
> formats such as DITA, DocBook, Open Document Format, Office Open XML,
> XML User Interface Language, Universal Business Language, ... Those formats 
> have many insights 'built-in'.
> 2. The format itself should be carefully
> checked with regard to modification capabilities. DocBook and DITA for
> example come with their own set of features for adapting them to a special
> need.
> 3. The mechanisms which you can or have to use depend on the schema
> language (DTD, XSD, RelaxNG, ...). Namespace-based modularization of schemas
> for example is difficult to realize for DTDs.
> NEW> NVDL, which can amongst others be viewed as a meta-schema language, 
> NEW> enables approaches which may be hard to realize otherwise.
> 4. Each schema language provides ways of extending or modifying existing
> schemas. XSD for example provides statements such as "import",
> "include", or "redefine" as well as mechanisms such as type
> substitution/derivation.
I still would prefer my version of 4 described at 
http://lists.w3.org/Archives/Public/public-i18n-its/2007JulSep/0095.html ;)

> 5. Some processors do not implement support for all schema language
> constructs.
> Thus, a schema which works in one environment may not work in a different
> one.
same for 5.


Received on Friday, 28 September 2007 12:30:30 UTC

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