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Re: Question regarding PSVI..

• To: Eddie Robertsson <erobertsson@a...>
• Subject: Re: Question regarding PSVI..
• From: Murali Mani <mani@C...>
• Date: Thu, 30 May 2002 16:29:37 -0700 (PDT)
• Cc: Dare Obasanjo <dareo@m...>, <xml-dev@l...>
• In-reply-to: <3CF6B6AA.EB0F34B@a...>

isn't one of the goals of XML Schema to try to avoid this -- that is --
once an element is assigned a type, try not to change the type assignment
for it???

so will this be considered as a separate case by XML editors??

thanks and regards - murali.

On Fri, 31 May 2002, Eddie Robertsson wrote:

> Hi,
>
> > regarding updates -- I had a question how updates work with wildcards.
> >
> > I presume the following schema is correct..
> >
> > <xs:element name="billTo">
> >   <xs:complexType>
> >     <xs:sequence>
> >       <xs:element name="name" type="xs:string"/>
> >       <xs:element name="address" type="xs:string"/>
> >       <xs:element name="zip" type="xs:integer"/>
> >       <!-- extension. one can put anything here -->
> >       <xs:any namespace="#all" processContents="skip" />
> >     </xs:sequence>
> >   </xs:complexType>
> > </xs:element>
> >
> > now, consider the tree (impractical, but still..)
> >
> > <billTo>
> >    <name>ABC</name>
> >    <address>California</address>
> >    <zip>90095</zip>
> >    <zip>90024</zip>
> > </billTo>
> >
> > Now consider an update (delete the first zip element) --
> >
> > <billTo>
> >    <name>ABC</name>
> >    <address>California</address>
> >    <zip>90024</zip>
> > </billTo>
> >
> > Now, I hope both the documents are valid w.r.to the schema?? -- also, will
> > the type assignment for <zip>90024</zip> change during the update??
>
> Yes. In the first instance <zip>90024</zip> will be matched by the wildcard
> and therefore will have the type xs:anyType (I think). In the second instance
> <zip>90024</zip> will be matched by the zip element declaration and hence have
> the type xs:integer.
>
> Cheers,
> /Eddie
>
> >
> > cheers and regards - murali.
> >
> > On Wed, 29 May 2002, Dare Obasanjo wrote:
> >
> > > > Anyways, my question is -- where will the type names and
> > > > element declarations associated with an element information
> > > > item in PSVI be used?
> > >
> > > I've seen user scenarios where both are needed.
> > >
> > > 1.) The type names for element declarations are useful for type based
> > > queries like those that will exist in Xpath 2.0 and XQuery.
> > >
> > >  EXAMPLE: /myco:company-roster/myco:employee[. instance of element of
> > > type myco:managerType]
> > >
> > > where myco:managerType is a complexType defined in the schema.
> > >
> > > 2.) Currently MSXML ships with the ability to obtain the Schema Object
> > > Model (SOM) object that represents an element or attribute declaration
> > > from a DOM instance. Our users love it and we are inundiated with
> > > requests to provide similar functionality for the .NET frameworks
> > > version of the DOM. One user scenario involved creating a schema-aware
> > > XML text editor and using the element decls for the particular element
> > > being edited to determine whether the edits were valid or not which was
> > > way more performant than validating on each edit.
> >
> > -----------------------------------------------------------------
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  • Re: Question regarding PSVI..
    • From: Eddie Robertsson <erobertsson@a...>

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