I've encountered a similar problem as in this question. Basically if my xml does not contain the information about the xsd, I get errors. Given below are the xml,xsd and a sample program giving me the errors.
hello.xml
<?xml version="1.0"?>
<hello>
<greeting>Hello</greeting>
<name>sun</name>
<name>moon</name>
<name>world</name>
</hello>
Had I replaced the 'hello' tag in the beginning with the following then the program would've run just fine.
<hello xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="hello.xsd">
hello.xsd
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="hello_t">
<xs:sequence>
<xs:element name="greeting" type="xs:string"/>
<xs:element name="name" type="xs:string" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:element name="hello" type="hello_t"/>
</xs:schema>
main.cpp
#include <iostream>
#include "hello.hxx"
using namespace std;
int
main (int argc, char* argv[])
{
try
{
unique_ptr<hello_t> h (hello (argv[1]));
for (hello_t::name_const_iterator i (h->name ().begin ());
i != h->name ().end ();
++i)
{
cerr << h->greeting () << ", " << *i << "!" << endl;
}
}
catch (const xml_schema::exception& e)
{
cerr << "exception caught("<<e<<"): "<<e.what() << endl;
return 1;
}
}
Error
exception caught(/home/vishal/testing/hello.xml:2:8 error: no declaration found for element 'hello'
/home/vishal/testing/hello.xml:4:13 error: no declaration found for element 'greeting'
/home/vishal/testing/hello.xml:6:9 error: no declaration found for element 'name'
/home/vishal/testing/hello.xml:7:9 error: no declaration found for element 'name'
/home/vishal/testing/hello.xml:8:9 error: no declaration found for element 'name'): instance document parsing failed
I wanted to know if there's a way to circumvent this problem without the need of specifying the xsd information in the xml. I also want that the parser throws me an error(just like it does now) if the xml does not conform to the xsd.
As suggested by Erik Sjolund in the comments, I added the following:
xml_schema::properties props;
props.no_namespace_schema_location ("hello.xsd");
unique_ptr<hello_t> h (hello (argv[1],0,props));
and now there's no need to mention the path of the xsd in the xml.
Thanks Erik!