how make policy files

 hello,

i've to secure a web service client by wsse digital signature.

I use jdev 11g to make it.

Where can i find documentation to make a policy file to do that?

Algorithm: rsa-sha1

Canonicalization: xml-exc-c14n#

Now i've only that :

<?xml version="1.0"?>

<wsp:Policy

  xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy"

  xmlns:sp="http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200512"

  >

  <sp:SignedParts>

    <sp:Body/>

  </sp:SignedParts>

</wsp:Policy>

and don't know for the end with Algo and Can.

Thank in advance