Re: libxml2 does xmlSchemaValidateDoc() support xml schema extensions?

Hi Andy,

> I am setting up the xml schema namespace the same way eclipse does when
> you create a new XSD or XML file. I entered
> *http://www.w3.org/2001/XMLSchema-instance*in the address bar of my
> browsers and got quite a surprise!
> 
The XML Namespace spec(1) states that the namespace URI need not be a
valid URL (i.e. point to a valid document on the network). In other
words, you are declaring your namespaces correctly.

> http://www.w3.org/TR/xmlschema-1/#no-xsi is very confusing. 
If you look at section 3.2.7 (first table) at that location, you'll see
that using 'xsi:type' is perfectly fine.

> where does libxml get the schema lang schema/dtd? As a test I put some
> typos in my xsd file. libxml generated an error when I tried to validate
> the xsd file as expected?
You don't have to worry about libxml retrieving resources at namespace
locations, that does not happen. Only the actual URI string matters (as
per (1)).

> what URL should I be using?
> 
> Do I need to make a special call to cause the libxml to use this other
> location?
Nope, you're using the right URIs, no network access is necessary.

> Would you be willing to send my your sample C program? 
Sure thing (I should have done so in my original reply).

[] to compile:
$ gcc `xml2-config --cflags --libs` zoo.c -o zoo

[] sample run:
$ ./zoo zoo.xml ZooRequest.xsd
Attempting to validate zoo.xml with ZooRequest.xsd
Document in zoo.xml is valid

[] contents of zoo.xml:
$ cat zoo.xml
<?xml version="1.0" encoding="UTF-8"?>
<zoo:cageRequest xmlns:zoo="http://www.example.org/Zoo"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <animal xsi:type="zoo:Fish">
    <name>Blue Fin Tuna</name>
    <numberOfFins>4</numberOfFins>
  </animal>
</zoo:cageRequest>

Hope you get things sorted out.

Piotr


(1) - http://www.w3.org/TR/REC-xml-names/#ns-decl