1.4 Relationship to Other Protocols
The Security Assertion Markup Language (SAML) Proxy Request Signing Protocol (SAMLPR) uses SOAP over TCP for local connections, as shown in the following layering diagram:

Figure 1: SAMLPR SOAP over TCP layer diagram
The Security Assertion Markup Language (SAML) Proxy Request Signing Protocol (SAMLPR) uses SOAP over HTTPS for remote connections, as shown in the following layering diagram:

Figure 2: SAMLPR SOAP over HTTPS layer diagram