Generally an XML schema specifies the allowed contents of an XML instance 
quite precisely and adding additional elements or attributes to an XML 
instance will likely cause it to become invalid.

However, you can specify what are called wildcards using xs:any and 
xs:anyAttribute which allow XML instances to include additional elements and 
attributes not explicitly specified in the schema.  Such additional elements 
do have to occur where the xs:any declarations allow them, so in general, 
even with xs:any declarations, you can't add in elements just any where.

HTH,

Pete Cordell
Codalogic
For XML C++ data binding visit http://www.codalogic.com/lmx/

----- Original Message ----- 
From: "Ben Stover" <bxstover@y...>
To: "xml-dev" <xml-dev@l...>
Sent: Monday, March 31, 2008 7:26 PM
Subject: [xml-dev] Does a XSD schema define the minimum or maximum structure 
of an XML doc?


> Assume I have an XML doc and the referring XSD schema.
>
> Can I add now additional elements and additional attributes (for existing
> elements) in the XML doc without getting the XML doc invalid?
>
> That would mean the XSD represents the minimum required content of an XML 
> doc
> which can be extended by multiple own parts.
> I am not talking about minoccur or maxoccur but the pure declaration of 
> elements
> and attributes.
>
> Ben
>
>
>
>
>
>
>
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