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RE: any validation for elements

From: "Michael Kay" <mike@--------.--->
To: "'Shlomo Yona'" <S.Yona@--.--->, <xmlschema-dev@--.--->
Date: 3/7/2007 9:21:00 AM
Do you agree with the exceptions mentioned with regards to xsi:type
mentioned in a previous reply to my question? 
 
Yes. (It's an aspect of lax validation that's often overlooked, and I
overlooked it in my response).
 
Michael Kay 

 

Thanks.

 

Shlomo.

 


  _____  


From: Michael Kay [mailto:mike@s...] 
Sent: =E2 06 =EE=F8=F5 2007 23:26
To: Shlomo Yona; xmlschema-dev@w...
Subject: RE: any validation for elements

 

I think your interpretation is pretty close.

 

Why use strict? It's useful when you are writing a schema that you =
expect to
be imported into another schema. It says "at this point you can insert =
any
element that has been defined in the importing schema".

 

With lax, if you find an element that has a definition in the schema, =
then
you validate it according to that definition (that is, you validate the
whole subtree). There's some debate about what you do with elements that
don't have a definition in the schema, the usual view seems to be that =
you
carry on doing lax validation to the grandchildren and so on.

 

Michael Kay

http://www.saxonica.com/

 


  _____  


From: xmlschema-dev-request@w... [mailto:xmlschema-dev-request@w...] =
On
Behalf Of Shlomo Yona
Sent: 06 March 2007 15:56
To: xmlschema-dev@w...
Subject: xsd:any validation for elements

Hello,

 

I=92m not sure that I=92m clear about the parsing instructions for =
xsd:any. Your
help in interpretation of the standard is most appreciated:

 

The =93skip=94 parser instruction in xsd:any says (I think) =96 only =
perform well
formedness and namespace checks but don=92t try to validate element =
names and
types.

The =93lax=94 parser instruction in xsd:any says (I think) =96 same as =
skip but if
you encounter an element name that is defined in your schema, then =
validate
it against the schema.

The =93strict=94 says (I think) =96 same as =93lax=94 but if you don=92t =
know the
element name =96 it is a validation error.

 

The following things make me think that I misinterpret the standard
correctly:

*	Why use =93strict=94? you might as well not defined your content group
as xsd:any. 

*	The =93lax=94 confuses me because I=92m not sure if when I encounter =
<a> I
should make sure that all its child elements and attributes conform with =
the
schema or just <a> itself with its attributes 

 

Actually, there are a few more unclear things, but I might resolve them =
if I
get the above stuff straight.

 

Thanks in advance for your help.

 

 

Shlomo.



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