WS-Eventing Optionality Analysis

Version 1.2 - October 7, 2010

wse:Subscribe

Optionality: required for event sources

Sub-Elements/Features:

wse:EndTo

optional for subscribers, optional for event sources

potentially at-risk

wse:Delivery

required for subscribers, required for event sources

wse:NotifyTo

optional for subscribers, required for event sources

wse:Format

optional for subscribers, optional for event sources

implied value is "http://www.w3.org/2010/08/ws-evt/DeliveryFormats/Unwrap"

potentially at-risk

wse:Expires

optional for subscribers, optional for event sources

potentially at-risk

The linkage of this element with the same sub-element of the wse:Renew message is unclear. Common sense would seem to dictate that, if an event source supports the use of this element, the subscription manager referenced by wse:SubscribeResponse/wse:SubscriptionManager must support wse:Renew/wse:Expires – but the WS-Eventing specification is silent on this matter.

xs:duration

optional for subscribers, required for event sources

xs:dateTime

optional for subscribers, optional for event sources

@BestEffort

optional for subscribers, required for event sources

wse:Filter

optional for subscribers, optional for event sources

potentially at-risk

@Dialect

optional for subscribers (default/implied value is "http://www.w3.org/2010/08/ws-evt/Dialects/XPath10"), event sources are not required to support any particular value – including the default

wse:SubscribeResponse

Optionality: linked to the use of wse:Subscribe

Sub-Elements/Features:

wse:SubscriptionManager

required for event sources, required for subscribers

wse:GrantedExpires

linked to the use of wse:Subscribe/wse:Expires

wse:Renew

Optionality: required for subscription managers.

Note that support for this operation is required even in cases where the event source/subscription manager doesn't support any notion of subscription expiration; the Renew operation is effectively a no-op for such implementations.

Sub-Elements/Features:

wse:Expires

optional for subscribers, optional for subscription managers

potentially at-risk

The linkage of this element with the same sub-element of the wse:Subscribe message is unclear. Common sense would seem to dictate that, if a subscription manager supports the use of this element, the event source to which the original Subscribe request was targeted must support wse:Subscribe/wse:Expires – but the WS-Eventing specification is silent on this matter.

xs:duration

optional for subscribers, required for subscription managers

xs:dateTime

optional for subscribers, optional for subscription managers

@BestEffort

optional for subscribers, required for subscription managers

wse:RenewResponse

Optionality: linked to the use of wse:Renew

wse:GetStatus

Optionality: required for subscription managers

wse:GetStatusResponse

Optionality: linked to the use of wse:GetStatus

Sub-Elements/Features:

wse:GrantedExpires

linked to the use of wse:Subscribe/wse:Expires and wse:Renew/wse:Expires

wse:Unsubscribe

Optionality: required for subscription managers

wse:UnsubscribeResponse

Optionality: linked to the use of Unsubscribe

wse:SubscriptionEnd

Optionality: optional for subscribers, optional for subscription managers

linked to the use of/support for wse:Subscribe/wse:EndTo

potentially at-risk

Sub-Elements/Features:

wse:Status

required for subscription managers

wse:Reason

optional for subscription managers, optional for subscribers

potentially at-risk