[xml] Can I read namespace URIs as regular attributes?

[Jianqing Zhang <arrow jianqing gmail com>]

I'm trying to read all namespace URIs by go through all attributes of
the root element. Can I read them as regular attributes?

My code is following:

....

  // Current node is the root element
  attrNum = xmlTextReaderAttributeCount(reader);
  for (i=0;i<attrNum;i++){

    xmlChar *name, *value;
    assert(xmlTextReaderMoveToAttributeNo(reader,i)==1);

    name = xmlTextReaderName(reader);
    value = xmlTextReaderGetAttributeNo(reader,i); // read by index
    //value = xmlTextReaderGetAttribute(reader,name); // or read by name

    if (xmlTextReaderIsNamespaceDecl(reader))
      cout << "it is a ns decl" << endl;  // It always shows it is
namespace declaration.

    // Name always can be read correctly
    if (name == NULL)
      cout << "name is null" << endl;
    else
      cout << "name is " << name << endl;

   // However, value is always null no matter index or name is used.
    if (value == NULL)
      cout << "value is null" << endl;
    else
      cout << "value is " << value << endl;
...
  }

Although names are always read correctly, I always get NULL for
values. Do I missing something?

Thanks