Namespace addition in a DTD in ESR

Question

Hi,
I have imported an external definition, a DTD, in my ESR. In external definition window in ESR there is a tab WSDL where I cant see namespace for he schema.
Can someone help me with how to get namespace in that WSDL or how to declare and add a namespace in a DTD (doctype) structure?
PFB the my DTD structure where MyMessage is root node in message structure.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE MyMessage SYSTEM "http://host.com/app_docs/dtd/PO/xyz.dtd" [
<!--
            $Source: /abc/def/xyz.dtd,v $
            $Revision: 1.2 $
            $Date: 2012/06/27 09:12:17 $
            Version 2.5: everything in version 2.4 plus custom field amount totals
-->
<!ELEMENT abc (#PCDATA)>
<!ELEMENT xyz (#PCDATA)>
<!ATTLIST …….
>
]>
and PFB corresponding WSDL:
<wsdl:definitions xmlns:wsdl="………/wsdl/">
   <wsdl:types>
      <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> ------> I want targetNamesapce field here with valid namespace.
         <xsd:element name="MyMessage" type="MyMessage" />
         <xsd:complexType ……………………….>
            <xsd:sequence>
               <xsd:element name="………………" type="xsd:string" />
               <xsd:element name="………………" type="xsd:string" />

Answer 1

Its very large and complex DTD which I imported, it looked like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE PurchaseOrderMessage SYSTEM "http://host.com/app_docs/dtd/po/PO.dtd" [
<!ELEMENT Address (#PCDATA)>
<!ATTLIST Address
    linenumber CDATA #REQUIRED
    label CDATA #IMPLIED
>
]>