Can someone verify the attached XML schema

Question

I recently started working on XML and I am creating an xsd for the following sample xml
<?xml version="1.0" encoding="UTF-8"?>
  <Student>
    <Student_Data>
       <name>John</path>
       <age>25</module>
       <Roll_No>1</coulmnname>>
    </Student_Data>
    <Student_Data>
       <name>mary</path>
       <age>26</module>
       <Roll_No>2</coulmnname>>
    </Student_Data>
  </Student> I created the following schema for the above XML
<?xml version="1.0" encoding="UTF-8"?>   
  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">   
   <xs:simpleType name="stringtype">   
      <xs:restriction base="xs:string"/>   
   </xs:simpleType>   
   <xs:complexType name="CommonData">   
     <xs:sequence>   
       <xs:element name="name" type="stringtype"/>   
       <xs:element name="age" type="stringtype"/>   
       <xs:element name="rollnumber" type="stringtype"/>   
     </xs:sequence>   
   </xs:complexType>   
   <xs:complexType name="student_list">   
     <xs:sequence>   
       <xs:element name="Student_Data" maxOccurs="unbounded" type="CommonData"/>   
     </xs:sequence>   
   </xs:complexType>   
  <xs:element name="Student" type="student_list"/>   
</xs:schema>  Can someone look at it and let me know if this is the right schema for the above sample xml?
I am not sure if I used the "student_list" in a right way.

Answer 1

Are you doing this by hand? Don't. It's much easier to use a tool, e.g. XMLSpy, or an IDE plugin.