[bt-spec] Issues related to the new draft model section of BTP Spec

[Tony Fletcher <Tony_Fletcher@btopenworld.com>]

Dear BTPers,

Peter has identified a number of the current Issues against the BTP
specification that should be answered by the new model section.  He has
asked me to read through and to try to indicate the particular parts of the
model draft that address particular issues.  I have tried to do this below
and have indicated who originated the issue.  It may will be that you will
consider other parts of the model to relevant to an issue as well (please
mail me with the issue number and the location of the relevant text /
diagram, if this is the case, so I can help Peter with the resolution of
these issues - Thanks).

Please would you all (not just the originators) like to look at the issues
and the
draft model text and satisfy yourselves that it does adequately address your
concerns.  It would be nice if you could indicate that you are satisfied.
If not, please contribute revised text / diagrams that would you would find
satisfactory.  Thank you.  I have attached the zip file of the version of
the model text I have used (resent to make reference easy for you).

Best regards  Tony
Choreology Ltd., 13 Austin Friars, London  EC2N 2JX
tony.fletcher@choreology.com
Tel +44 (0) 20 7670 1787      Mobile: +44 (0) 7801 948219
Home:
amfletcher@iee.org  or  tony_fletcher@btopenworld.com
Tel :    +44 (0) 1473 729537   or +44 (0) 7801 948219
----- Original Message -----
From: "Peter Furniss" <peter.furniss@choreology.com>
To: "Tony Fletcher" <tony.fletcher@choreology.com>
Subject: model


 9 Better explanation of Atom/Cohesion
Alastair Green
'Atoms and Cohesions' (Page 8-9)
'Evolution of confirm-set' (Page 14-17).

13 Definition of Terminator
Gordon Hamilton
'Atoms and Cohesions' (Page 9) - last paragraph.
'Business transaction creation' (Page 10) - and particularly the middle
paragraph.
'Control of inferiors' (Page 14).
'Terminator:Decider failures' (Page 24-25)

21 Multiple Superior:Inferior relationships within a Cohesion
Gordon Hamilton
'Control of inferiors' (Page 14).
'"Checking" and context-reply' (Page 11).

24 The apparent complexity of model is too great.
Bill Cox
'Model' and 'Example Core' (Page 2)
Whole of model section text.

25 Clarity needed between atomic and cohesion
Bill Cox
'Atoms and Cohesions' (Page 8-9)
'Evolution of confirm-set' (Page 14-17).

27 Draft 0.9 is opaque, difficult to read and to understand
Bill Cox
'Structure of this specification' (Page 1)
Whole of model section text.

28 Need for state diagrams and explanatory text
Bill Cox
Not addressed yet?

32 Italics for first use of "Business Transaction"
Mark Little
'Business Transactions' (Page 3) - convention used seems to be to use bold
for first occurance of a glossary term rather than italics.


34 Superior and Inferior
Mark Little
'Superior:Inferior relationship' (Page 6)
'Business transaction trees' (Page 6-7)

35 Superior and Inferior (2)
Mark Little
'Superior:Inferior relationship' (Page 6)
'Business transaction trees' (Page 6-7)

36 Two-phase cancel - NOT
Mark Little
'Two-phase outcome' (Page 5).
'Autonomous cancel and confirm' (Page 19-21).

37 Acceptable to application or participant
Mark Little
'External effects' (Page 4).

38 First use of "cohesion"
Mark Little
'Atoms and Cohesions' (Page 8-9) - Build up of the cohesion concept in the
model section overcomes original issue(?)

42 Cohesive Superior
Mark Little
'Atoms and Cohesions' (Page 8-9) - The model section provides the required
introduction(?)

43 REQUEST_STATUS and STATUS coupling
Mark Little
Comment needs to be addressed in Part 2 of spec. rather than the model
section?
Need to add to 'Terminator:Decider failures' section (Page 24-25) and / or
add section on status requestor 'entity'?

44 Decider and other terms
Mark Little
'Atoms and Cohesions' (Page 9) - last paragraph.
'Business transaction creation' (Page 10) - and particularly the middle
paragraph.

45 Compound addresses
Mark Little
Issue not properly addressed yet?
'Redirection' (Page 24) - particularly first bullet.

48 completion of enrolment
Mark Little
'Business transaction propagation' (Page 10).
'"Checking" and context-reply' (Page 11-12).
'Optimisations and variations'   'Spontaneous prepared' (Page 17) -
particularly middle paragraph.

53 will or may contradict ?
Mark Little
'Evolution of confirm-set' (Page 14-17).

56 State table text
Mark Little
Relevant text used as reference material for writing the model section.

59 Interposition description needed
Mark Little
'Business transaction trees' (Page 7-8) - particularly paragraph after
Figure 3 and associated Figure 4
'Creation of Intermediates (Sub-Coordinators and Sub-Composers)' (Page 11).

63 Clarify the terminology around actors, roles and relationships
Sazi Temel
'Actors and roles' (Page 5)

64 can inferior know type of superior ?
Pyounguk Cho
'Business transaction creation' (Page 10) - and particularly the last
paragraph.
'Business transaction propagation' (Page 10).

65 participant as immediate inferior of composer ?
Pyounguk Cho
'Participants, Sub-Coordinators and Sub-Composers' (Page 9)

66 Event diagram for termination protocol
Pyounguk Cho
Text and diagrams of model section may help - but what exactly did you have
in mind Pyounguk?  State table in Part 2 specifies the definitive permitted
sequences.  Message sequences that illustrate these could be added in model
section (but limited) or in Primer (more cases).

68 (sub)coordinators, (sub)composers with no inferiors
Pyounguk Cho
'Participants, Sub-Coordinators and Sub-Composers' (Page 9)

69 prepared subcomposer with unprepared inferiors ?
Pyounguk Cho
'Atoms and Cohesions' (Page 9) - see penultimate paragraph - NOT permitted.
'Creation of Intermediates (Sub-Coordinators and Sub-Composers)' (Page 11).

70 Confirm-set evolution
Pyounguk Cho
'Evolution of confirm-set' (Page 14-17).

72 Scope of Context
Pyounguk Cho
'Business transaction propagation' (Page 10).
'"Checking" and context-reply' (Page 11-12).
'Control of inferiors' (Page 13).

73 ACID relaxation in overview
Pyounguk Cho
'External Effects' and Table 1 (Page 4)

75 Ensure all participants are enrolled
Sazi Temel
'"Checking" and context-reply' (Page 11-12).
'Optimisations and variations'   'Spontaneous prepared' (Page 17) -
particularly middle paragraph.

76 Need for explanatory materiel
Mark Little
'Model' and 'Example Core' (Page 2)

88 Cohesion vs. Atomic
Geoff Brown
'Atoms and Cohesions' (Page 8-9)



> Peter
>
> ------------------------------------------
> Peter Furniss
> Technical Director, Choreology Ltd
> web: http://www.choreology.com
> email:  peter.furniss@choreology.com
> phone:  +44 20 7670 1679
> direct: +44 20 7670 1783
> mobile: 07951 536168
> 13 Austin Friars, London EC2N 2JX
>

2002-02-26.BTP_Model_draft.zip