Re: [docbook] Schema Location

[Giuseppe Greco <giuseppe.greco@agamura.com>]

Hi Tom,

What you say is exactly what I supposed...
Anyway, many thanks for your help!

Talk to you soon,
j3d.

Thomas Schraitle wrote:
> Hi Giuseppe,
> 
> Am Samstag, 27. Oktober 2007 12:59:04 schrieb Giuseppe Greco:
>> With DocBook 4.x I used a preamble like this
>>
>> ?xml version="1.0" encoding="utf-8"?>
>> <!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
>>      "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd";>
>> <article lang="en">
>>      ...
>> </article>
>>
>> ... while with DocBook 5.x I should use something like this
>>
>> <article
>>      xmlns="http://docbook.org/ns/docbook"; version="5.0"
>>      xml:lang="en">
>>      ...
>> </article>
>>
>> In the first XML snippet
>> "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"; is the real
>> physical location of the DocBook DTD and all the stuff works fine.
>>
>> With DocBook 5.x things change... is there a way to associate
>> "http://docbook.org/ns/docbook"; with the physical location of the
>> DocBook schema in a tool-independent way (as with DocBook DTD)?
> 
> I am not 100% sure but from what I've read there is no need for such a 
> mechanism. In [2] there is an explanation why there is no similar method 
> in RELAX NG:
> 
>  »In fact, RELAX NG does not define any mechanism for associating a
>  document with a RELAX NG schema. Although it is useful to be able to
>  specify rules for determining the schema to be used to validate a
>  particular document, this problem is not specific to RELAX NG.
>     Validation is just one of many processes that can be applied to 
>  an XML document. For example, a user may wish to perform XInclude
>  processing or XSLT processing. A user may wish to perform validation
>  before or after any of these other processes. The problem of
>  associating a schema with a document is really just a special case
>  of the problem of associating processing with a document. What is
>  needed is a solution that can specify a series of processes to be
>  applied to a document.«
> 
> Applied to DocBook, it's more a problem of how you call your favorite 
> validation tool. The Transition Guide[2] just gives an example how to 
> run the msv validator:
> 
>   java -Xss512K -jar /path/to/relames.jar \
>        /path/to/docbook.rng \
>        document.xml
> 
> Hope that answers your question. :)
> 
> 
> Best wishes,
> Tom
> 
> 
> --- References:
> [1] http://www.thaiopensource.com/relaxng/design.html#section:17
> [2] http://www.docbook.org/docs/howto/#validators
> 
> 
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