Describe the main elements in the assertion

Author: vrajmohan

_pages/saml/authentication.md

@@ -174,6 +174,14 @@ A proofed identity request at AAL2, with phishing resistent MFA, for email, phon
         <p markdown="1">After the user authenticates, Login.gov will redirect and POST a form back to your registered Assertion Consumer Service URL with a hidden form control named `SAMLResponse`.</p>
         <p markdown="1">`SAMLResponse` contains a base64-encoded XML payload that contains data that is encrypted with the service provider's public key.</p>
         <p markdown="1"> The decrypted `SAMLResponse` contains a `<saml:Assertion>` element, which in turn contains elements like `<saml:Subject>`, `<saml:AttributeStatement>` and `<saml:AuthnStatement>`. </p>
+        <dl>
+            <dt markdown="1">`Subject`</dt>
+            <dd>Contains the NameID, the Recipient of this information and the validity period.</dd>
+            <dt markdown="1">`AttributeStatement`</dt>
+            <dd>All the requested attributes.</dd>
+            <dt markdown="1">`AuthnStatement`</dt>
+            <dd>Contains the AAL that was used.</dd>
+        </dl>
         <p>For example, {{ decrypted_response | markdownify }}</p>
           <a href="{{ '/saml/logout/' | prepend: site.baseurl }}" class="usa-link margin-top-4 mobile:display-none desktop:display-block">Next step: Logout</a>
     </div>