REL-21 & REL39 proposal

["Goodner, Marc Andrue" <marc.andrue.goodner@sap.com>]

REL-21 Proposal: 
3.1.1. <From> Element
The REQUIRED <From> element is used to specify the original sender node of the message. This is used by the WS-RM layer to unambiguously identify the original sender as there may be higher level addressing or routing schemes in place that have delivered the message to the current receiver node making the true origin of the message ambiguous to the current receiver node. The <From> element identifies the initial sender's endpoint to send the Acknowledgment or Fault Message to when the <ReplyTo> element in the ReliableMessage header is not present.
The value of this element MUST be a URI as defined in [RFC 2396].

3.1.2. <To> Element
The <REQUIRED> element is used to specify the ultimate receiver node of the message known to the sender.
The value of this element MUST be a URI as defined in [RFC 2396].

REL-39 Proposal:
3.2.2. <ReplyTo> Element
This OPTIONAL element is used to specify a different endpoint than the initial sender to reply to with an Acknowledgment or Fault Message. Higher level addressing or routing schemes MAY supercede the value of the From element when <ReplyTo> is not used to indicate the endpoint to receive an Acknowledgment or Fault Message. Higher level addressing or routing schemes MUST NOT supercede the value of the ReplyTo element when it is used.
The value of this element MUST be a URI as defined in [RFC 2396].