[xsd-users] reading and writing non root elements

[Greg Carter]

Hello Boris,

One last problem.  I changed my schema so that the element was global 
and added a ref to it.  I used the code that you gave in the last post 
plus the helper functions in the FAQ.  I also added a call to 
setAttributeNS and added an entry for the prefix for my namespace (tns 
in the example).  In the generated XML I am not getting my root element 
tagged with the prefix, if I manually add the prefix to the root element 
it validates.

This is what is generated:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<elOne  xmlns:tns="http://www.blah.com/MySchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation=http://www.blah.com/MySchema MySchema.xsd">
   <content1 value="1">
   </content1>
   <content2 value2="2">
   </content2>
</elOne>

If I change it to
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<tns:elOne  xmlns:tns="http://www.blah.com/MySchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation=http://www.blah.com/MySchema MySchema.xsd">
   <content1 value="1">
   </content1>
   <content2 value2="2">
   </content2>
</tns:elOne>

(add the tns: prefix to elOne)
it works.  This is also how the XML looks (tns namespace prefix) when 
generated by the XSD generated code for the global element I chose as 
the root element.

I did step through the XSD generated code to see where the prefix was 
added but it wasn't immediately clear.

I do have a comment on multiple global elements, but I'll put it in a 
new message to the list.
Thanks.
Greg.

Boris Kolpackov wrote:
> Hi Greg,
>
>   
> I am glad you've figured it out. I think your problem with setProperty
> comes from the fact that Xerces-C++ treats the location as a relative
> path unless it is in the form "file:///absolute/path/to/your/schema.xsd".
> You can read more about this in Q 2.4 of the "official" C++/Tree Mapping
> FAQ:
>
> http://codesynthesis.com/projects/xsd/documentation/cxx/tree/faq/#2.4
>
>
> Also note that in order for your XML fragment to be successfully
> validated against the schema you will need to declare the fragment's
> root element as global in the schema. Only global elements are allowed
> to be document roots in XML Schema.
>
>
> hth,
> -boris
>