I need to create a policy file for my Web Service with security built-in and
I’m using VB.net and WSE 2.0 to do it.

I am new to building Web Services, so any help would be appreciated.  So
far, I know I need to add a <policy></policy> tag in the WEB.config, and
between the tags would be the name of the xml document that has the policies
in it.  Is there anything else that I should include in the Web.config file?

I have created this policyCache.xml document and added it to my project.  In
researching what needs to go in my policy I have come across many examples,
and I would like to know what each tag means and the definition on how to use
them.  Can anyone tell me where to find this information?  Below is a sample
I found that I am trying to understand.

<policyDocument>
 <mappings>
   <endpoint>
     <operation/>
     <defaultOperation>
       <request/>
       <response/>
       <fault/>
     </defaultOperation>
   </endpoint>
   <endpoint>
     <defaultOperation>
       <request/>
       <response/>
       <fault/>
     </defaultOperation>
   </endpoint>
   <defaultEndpoint>
     <defaultOperation>
       <request/>
       <response/>
       <fault/>
     </defaultOperation>
   </defaultEndpoint>
 </mappings>
 <policies>
   <wsp:Policy>
     <wssp:Confidentiality>
       <wssp:KeyInfo>
         <wssp:SecurityToken>
           <wssp:TokenType></wssp:TokenType>
         </wssp:SecurityToken>
       </wssp:KeyInfo>
       <wssp:MessageParts></wssp:MessageParts>
     </wssp:Confidentiality>
   </wsp:Policy>
   <wsp:Policy>
     <wssp:Confidentiality>
       <wssp:KeyInfo>
         <wsse:SecurityTokenReference>
           <wsse:KeyIdentifier></wsse:KeyIdentifier>
         </wsse:SecurityTokenReference>
       </wssp:KeyInfo>
       <wssp:MessageParts></wssp:MessageParts>
     </wssp:Confidentiality>
   </wsp:Policy>
   <wsp:Policy>
     <wssp:Integrity>
       <wssp:TokenInfo>
         <wssp:SecurityToken>
           <wssp:TokenType></wssp:TokenType>
         </wssp:SecurityToken>
       </wssp:TokenInfo>
       <wssp:MessageParts></wssp:MessageParts>
     </wssp:Integrity>
   </wsp:Policy>
   <wsp:Policy>
     <wssp:Integrity>
       <wssp:TokenInfo>
         <wsp:OneOrMore>
           <wssp:SecurityToken>
             <wssp:TokenType></wssp:TokenType>
           </wssp:SecurityToken>
           <wssp:SecurityToken>
             <wssp:TokenType></wssp:TokenType>
           </wssp:SecurityToken>
         </wsp:OneOrMore>
       </wssp:TokenInfo>
       <wssp:MessageParts></wssp:MessageParts>
     </wssp:Integrity>
   </wsp:Policy>
 </policies>
</policyDocument>

Thanks,