Re: Schema validation using multiple schemas

[Adachi Seiichi]

Hi Jeff,

Thanks again for the explaination.  It looks like my understanding of
the schemaLocation attribute was mistaken.  And it looks like the XML
schema books I have is also mistaken, so I will try to find a different 
book.  

Again, Jeff, Bob, thanks for the explanations.

Seiichi


>From: "Jeff Greif" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: Re: Schema validation using multiple schemas
>Date: Wed, 27 Aug 2003 07:29:02 -0700
>
>The XML Schema specification specifies how the schemaLocation attribute 
can
>be used, and how import can be used.  Note that the only attribute 
required
>for the import element is the namespace, the location attribute is only a
>hint to the processor. The location of the schema need not be specified if
>the processor can get it some other way, such as the schemaLocation
>attribute or some mechanism specific to the processor (such as the Xerces
>externalSchemaLocation property).  Similarly, the schemaLocation attribute
>is regarded as only a hint to the schema processor -- if the processor has
>some other way of obtaining locations, it is allowed to use it and ignore
>the schemaLocation attribute.
>
>The designers of the XML Schema spec had in mind various issues of 
security
>and contract adherence in making these provisions.  The idea is that
>organization B is providing documents to A supposedly in accordance with
>some agreement they've made.  Org. A will validate the documents with its
>known-to-be-secure-and-unaltered copy of the agreed-upon schema, not some
>random URL that B might put into the schemaLocation attribute in an effort
>to cheat, or a copy that might represent the next version of the 
agreed-upon
>schema which A's processor has not yet been upgraded to handle.
>
>Jeff
>----- Original Message -----
>From: "Adachi Seiichi" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Wednesday, August 27, 2003 5:00 AM
>Subject: Re: Schema validation using multiple schemas
>
>
> > Thanks for the explanation on the schema processors.  I now understand
> > better on how they are implemented and how they work.  Is the general
> > principle Jeff stated specified in some specification?
> >
>
>
>
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