Issue 5168: Service 9.10: Subscribe Interaction Class With Regions: passive indicator                                                                                                                               (dss2ftf)
Source: MITRE (Ms. Susan Symington, susan@mitre.org)
Nature: Clarification
Severity: Significant
Summary: This service description should be clarified regarding the intended use of the optional passive subscription indicator. The text does not explain what it means for a subscription with region to be passive or active. It is recommended that clarifying text be added that indicates that the intent is for invocations of the Subscribe Interaction Class With Regions service for any given interaction class to be cumulative with respect to the set of subscribed regions of a given interaction class, but substitutive with respect to whether each (interaction class, region) pair is subscribed actively or passively. If the current invocation of the Subscribe Interaction Class With Regions service includes a given (interaction class, region) subscription that already exists, the property of active versus passive for that (interaction class, region) subscription  is substituted according to the value (or absence) of the optional passive subscription indicator argument to the current invocation of the Subscribe Interaction Class With Regions service.
Resolution: Add text explaining the use of the optional passive subscription indicator.
Revised Text: Add the following to 1.4.7:
Service 9.10: Subscribe Interaction Class With Regions
Interpretation 1
The use of the optional passive subscription indicator is expected to work as follows:
Each subscribed interaction class with regions is subscribed either actively or passively
with a given region, but not both. Two different interaction classes that are subscribed at
the same region may be subscribed differently from each other: one active and one
passive, and the same interaction class that is subscribed with two different regions may
be subscribed differently (either actively or passively) with each region. Each (interaction
class, region) pair specified in a given invocation of the Subscribe Interaction Class With
Regions service will take on the effect of the optional active/passive subscription
indicator supplied (or not supplied) with that service invocation. Furthermore, if there is
an existing (interaction class, region) subscription that has the same interaction class and
region values as those specified in the current invocation of the Subscribe Interaction
Class With Regions service, it will take on the effect of the optional passive/active
subscription indicator supplied (or not supplied) with the service invocation.
Invoking the Subscribe Interaction Class With Regions service with an (interaction class,
region set) pair such that the region set is empty shall not change the active/passive
subscription nature of any of the (interaction class, region) pairs that are already
subscribed. Each use of the Subscribe Interaction Class With Regions service shall add
the specified regions to the set of subscriptions of the specified interaction class, if they
are not already in this set; and may change the active/passive nature of existing
subscriptions if they are. Rationale: The intent is for invocations of the Subscribe Interaction Class With Regions
service for any given interaction class to be cumulative with respect to the set of
subscribed regions of a given interaction class, but substitutive with respect to whether
each (interaction class, region) pair is subscribed actively or passively. If the current
invocation of the Subscribe Interaction Class With Regions service includes a given
(interaction class, region) subscription that already exists, the property of active versus
passive for that (interaction class, region) subscription is substituted according to the
value (or absence) of the optional passive subscription indicator argument to the current
invocation of the Subscribe Interaction Class With Regions service.
Actions taken:
April 10, 2002: received issue
October 23, 2002: closed issue
Discussion: 

End of Annotations:=====
59.	Issue Title: Service 9.10: Subscribe Interaction Class With
   Regions: passive indicator
Page: 174
Nature of Issue: Clarification
Severity of Issue: Significant
Full Description of the Issue:

This service description should be clarified regarding the intended
use of the optional passive subscription indicator. The text does not
explain what it means for a subscription with region to be passive or
active. It is recommended that clarifying text be added that indicates
that the intent is for invocations of the Subscribe Interaction Class
With Regions service for any given interaction class to be cumulative
with respect to the set of subscribed regions of a given interaction
class, but substitutive with respect to whether each (interaction
class, region) pair is subscribed actively or passively. If the
current invocation of the Subscribe Interaction Class With Regions
service includes a given (interaction class, region) subscription that
already exists, the property of active versus passive for that
(interaction class, region) subscription  is substituted according to
the value (or absence) of the optional passive subscription indicator
argument to the current invocation of the Subscribe Interaction Class
With Regions service.