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,