Just to clarify, the credit for the language (static vs. dynamic) belongs
to Wes, not me. Credit where it's due....
Joe
Joseph Chiusano
Associate
Booz Allen Hamilton
700 13th St. NW
Suite 1100
Washington, DC 20005
O: 202-508-6514
C: 202-251-0731
Visit us online@ http://www.boozallen.com
From: Bashioum, Christopher D
[mailto:]
Sent: Thursday, December 08, 2005
11:24 AM
To: Chiusano Joseph;
Subject: RE: [soa-rm] RE: Act versus
Object versus...both?
<Quote>
Is it
fair to say the thing is the static view and the action the dynamic
one?
</Quote>
Yup
- I also like the language you used.
From: Chiusano Joseph
[mailto:]
Sent: Thursday, December 08,
2005 11:19 AM
To:
Subject:
RE: [soa-rm] RE: Act versus Object versus...both?
<Quote>
Is
it fair to say the thing is the static view and the action the dynamic
one?
</Quote>
Yes - I like
that.
Joe
Joseph Chiusano
Associate
Booz Allen Hamilton
700 13th St. NW
Suite 1100
Washington, DC 20005
O: 202-508-6514
C: 202-251-0731
Visit us online@ http://www.boozallen.com
From:
[mailto:]
Sent: Thursday, December
08, 2005 11:17 AM
To: ; Metz Rebekah;
Chiusano Joseph; ;
Subject: RE: [soa-rm] RE: Act versus
Object versus...both?
The
notion of duality for a service is
nice.
Is
it fair to say the thing is the static view and the action the dynamic
one?
Wes
-----Original
Message-----
From:
Bashioum, Christopher D [mailto:]
Sent: December 8, 2005 11:11
AM
To: Metz Rebekah;
Chiusano Joseph; Laskey, Ken;
Subject: [soa-rm] RE: Act versus
Object versus...both?
Wow
- that was a mouthful! ; )
So I
think you said that its ok as long as we all agree that a service is
both a thing and an action - is that correct?
From: Metz Rebekah
[mailto:]
Sent: Thursday, December 08, 2005
10:26 AM
To: Bashioum,
Christopher D; Chiusano Joseph; Laskey, Ken;
Subject: Act versus Object
versus...both?
The
phrasing Chris selected prompted something for me…let me see if I can put
words to it. After the discussions yesterday, I spent some time last
night reading linguistic research to try and better understand what about
the relationship between noun and verb forms of ‘service’ are sticking
points for me. As I suspected; it has to with the implications about
the relationships between these lexical forms. What was most
interesting was to realize the variety of aspects to be considered.
However, I think that I found what makes me want to tread careful and
clearly understand and distinguish between service as a noun and service
as a verb.
In
addition, the phrasing you selected suggested that there are two active
portions of the ‘service scenario’:
1)
That
‘of bringing a
desired capability to bear’
2)
That
of the capability itself
I’m
looking right now at the first active portion only. I think we
already recognize the distinction between the two in wd-10. But this
served as a reminder to me.
Essentially, when
using the nominalized form of an active verb like ‘to serve’ in a
sentence; an abstract noun performs most of the work. Nominalization
can also permit the elision of the subject and object of a verb.
Therefore, we can write about a process or action and yet not mention who
is involved. This is part of the sticking point for me when it comes
to a reference model in which we’re trying to unambiguously define key
concepts – because we’re using terminology that permits us to
unintentionally cloud the concepts when we are seeking
clarity.
Harrumph.
To me this still wasn’t completely satisfying.
So I
dug a bit further and discovered that there are many ‘types’ of
nominalizations, including ‘episodic nominalizations.’
An episodic nominalization takes an active process and
conceives it as a noun. So far so good, for service as both noun and
verb. However, here’s where I found some interesting information
about the intuition of language that is captured by these different
forms. Although quite similar, these two forms represent a different
semantics which conceptually develop. In an episodic nominalization,
the conception is no longer viewed as a process but rather as a single
episode (i.e. only as the sum rather than the sum of its parts). Yes
this starts to get into cognitive psychology and linguistics ( and I
apologize to those who just want to know what does the word service mean
within the context of SOA but bear with me).
Where I got to is
that yes, we may actually be talking about the same thing but from
different angles. What I’m recognizing is that those angles come
with specific inferences and assumptions that stem from language itself
that we may not be explicitly aware of and which set up
confusion.
So
what am I saying? That the text in the draft works well to recognize that
the term service(noun) unifies several related concepts – and we do it
justice to recognize those interrelated concepts. Using the
terminology above, they’re conceptualized into a single episode. If
we are clear about that, then I’ll accept that a service can be intended
as either.
(Now
you all know how I spent my evening)
Rebekah
Rebekah
Metz
Associate
Booz Allen
Hamilton
Voice:
(703) 377-1471
Fax: (703)
902-3457
From: Bashioum,
Christopher D [mailto:]
Sent: Thursday, December 08, 2005
9:52 AM
To:
Chiusano Joseph;
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
Thanks - that was
helpful.
That
being the case, the RM concept of a service maps to a concrete "thing"
called a service, that performs the action of bringing a desired
capability to bear when invoked in the context of an SOA - or at least an
RM conformant SOA.
How's that for a
beltway insider?
From:
Chiusano Joseph
[mailto:]
Sent: Thursday, December 08, 2005
9:41 AM
To:
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
Please see
comments below, marked with [JMC].
Joe
Joseph
Chiusano
Associate
Booz Allen
Hamilton
700 13th St.
NW
Suite
1100
Washington,
DC 20005
O:
202-508-6514
C:
202-251-0731
Visit us online@
http://www.boozallen.com
From: Bashioum,
Christopher D [mailto:]
Sent: Thursday, December 08, 2005
9:31 AM
To:
Chiusano Joseph;
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
Does that mean
that all the elements in the concept map are only concepts - none of them
translate into objects or actions (or any other concrete
thing)?
[JMC] They
translate into concrete things when an implementation is created that
conforms to the reference model (or an existing implementation is mapped
to it).
I thought one of
the purposes of a RM was to identify and give a language to the basic
elements of the thing being modeled. I.e., and SOA will have all the
elements that are identified in the RM.
[JMC] A SOA
*implementation* may have concrete elements that map to the abstract
elements (concepts) that are identified in the RM.
I think Ken's
description is still the best one, that "a service is a means to
bring a capability to bear in an SOA context". In this case,
it is still a noun (or a thing) (or at least I think so, my wife is the
English major - not me)
[JMC] It is a
noun, as well as an action (alluding to my prior recent post on this). So
in comparison, a political compaign (sorry, I live in Washington DC;) can be thought of as a means to
potentially bring a candidate into elected political office (using very
loose wording here), while "to campaign" is the action that is associated
with that noun. If one had a reference model for campaigns, it would
contain concepts such as "candidate", "policitical party", "regions"
(perhaps the region(s) of the country that their campaign would cover - a
gubernatorial campaign would cover one state, a presidential campaign all
states), etc. In order to campaign (the action), one would leverage the
campaign reference model as a means to guide them in their action of
campaigning.
Joe
From:
Chiusano Joseph
[mailto:]
Sent: Thursday, December 08, 2005
6:58 AM
To:
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
I know we're trying to avoid "+1"'s as much as
possible on this list, so I will put it into words: I completely agree
with Duane on all his points just below.
Duane, I'm glad
you've started your guide to concept maps - hopefully in time this will
help the situation. We have used concept maps for the DRM as
well.
Joe
From: Duane Nickull
[mailto:]
Sent: Thu 12/8/2005 1:40
AM
To: Metz Rebekah;
Bashioum, Christopher D;
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
I believe that
the problem, with is largely due to the fact there is no normative
reference for how to interpret concept maps. In this case, a service
is neither an action nor an object. It is imply an abstract
concept.
D
*******************************
Adobe
Systems, Inc. - http://www.adobe.com
Vice Chair -
UN/CEFACT http://www.uncefact.org/
Chair - OASIS SOA Reference Model
Technical Committee
Personal Blog - http://technoracle.blogspot.com/
*******************************
From: Metz Rebekah
[mailto:]
Sent: Wednesday, December 07, 2005
7:18 PM
To: Bashioum,
Christopher D;
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
From: Bashioum,
Christopher D [mailto:]
Sent: Wednesday, December 07, 2005
5:06 PM
To: Metz Rebekah;
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
Rebekah,
what about the
potential of an act?
[->]
The potential of service is an offer.
I have a problem
with the following
<Snip>
The actual
invocation and performance of the capability is the service; i.e. the
action.
</Snip>
if I understand
what you are saying here, it would imply that a service is not a service
until it is actually performing an action. During the time that it
is "waiting" to perform an action it is not a service, nor is it after it
has completed the action it was created to do.
[->]
yes, you are right. That is exactly what I’m implying. The
service isn’t performing the action, the implementation of the action
is. The service is the performance.
In Duane's
diagram, the service exists independent of the interaction. However,
the interaction is what causes the real-world effect.
I'm not sure I
buy the other statement that a service is an act as opposed to an
object. Isn't it an object (in that it exists) who's purpose is to
perform an act?
[->]
So I’ll ask a question in return. Let’s assume the statement is
true. If a service exists as an object that is independent of the
capability who’s purpose it is to perform; what differentiates the service
from the capability?
For that
matter, is the capability what is actually providing the "action" and the
service is the means to access that action?
[->]
From this perspective, what differentiates the service from the service
access point?
[->]
My point is that the conceptualization of service as an object doesn’t
provide resolution to these questions. It is for this reason that I
started examining service as a verb rather than a noun. From that
perspective, the concepts and the relationships between them
clarified.
Rebekah
From: Metz Rebekah
[mailto:]
Sent: Wednesday, December 07, 2005
4:37 PM
To:
Subject: RE: [soa-rm] Proposal:
Reorganization of SOA-RM Draft for Better
Gosh – if this
email came through in some weird format for everyone else, I am terribly
sorry about the wacky formatting of this email thread. Not sure if
everyone saw it as I did, but at least my outlook client puked
=)
Uh-oh. We
seem to be starting to head back to the service as an object as opposed to
an act. I still do not believe that a service is an ‘object.’
In fact, I believe that assumption has caused much of the
difficulty in figuring out what a service actually is.
What is invoked
is a capability, consistent with the execution context and so to produce
real world effects. The actual invocation and performance of the
capability is the service; i.e. the action. Hence I maintain that
visibility, interaction and effect are the interrelated concepts often
(yet confusingly) referred to with a shorthand nomenclature of
‘service.’
As far as roles
go, the very essence of the word service is the recognition that
<someone> does <something> for <someone else>. I
would agree that any other specification of this generalization (uh…isn’t
that an ontology) belongs in something other than the RM.
Rebekah
Rebekah Metz
Associate
Booz Allen
Hamilton
Voice: (703)
377-1471
Fax: (703)
902-3457
From: Ken Laskey
[mailto:]
Sent: Wednesday, December 07, 2005 4:19
PM
To: Metz Rebekah
Cc: Jones, Steve G; ;
; ; ;
; ;
; ;
Subject: Re: [soa-rm] Proposal: Reorganization
of SOA-RM Draft for Better
inline
On Dec 7, 2005,
at 4:00 PM, Metz Rebekah wrote:
Comments inline…
From: Ken Laskey
[mailto:]
Sent: Wednesday,
December 07, 2005 3:43 PM
To: Jones, Steve
G
Cc:
; ; ;
; ;
; ;
;
Subject: Re:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
If I invoke a
service, I am a service consumer. It does not matter if I invoke the
service on my own initiative or am told to do it (through a targeted
instruction or as part of a more complex set of instructions), I am still
the service consumer.
[->] Agreed.
I could glibly
say that if I "provide" a service, I'm a service provider, but I fear
things are not that simple. Is the entity that created the service its
provider, or the one who maintains it, or the one who hosts it, or the one
who pays for it, or ...?
[->] I see
this being a question of ‘what are the roles’ versus ‘who plays the
roles’. At first pass, it seems right that we recognize the
roles @ the RM level and leave the details of determining the best way to
decide how to assign some entity into that role to the RA.
I think it is
easy to start naming roles but difficult to stop, and the roles will get
more use-specific.
Luckily, from the
RM standpoint, we don't care.
[->] or do we
just delegate =)
... to someone
who has no choice but to care ;-)
To be used within
the context of SOA, the service must be visible, must be able to take part
in an interaction
[->] Here it
sounds like the service is an active player in an interaction. Isn’t
it that the service consumer and provider interact (as specified…?
Isn't the service
an active player? I invoke it to get its real world effect, so it
certainly sounds like it does something.
(as specified by
the established execution context), and must produce a real world effect
(which I assume may in some circumstances be null). It has been "provided"
but we don't care how or by whom.
So, in summary,
there's a lot of muddy water but sometimes we can avoid playing in it. :-)
[->] Or we can
draw a circle around it and leave that to the RA =)
... at which
point you initially choose RA cases that you can more cleanly defined. You
eventually get to the tougher ones, but we should learn to ride a bicycle
before we get a motorcycle (unless Duane has a different perspective)
Ken
[->] Rebekah
Ken
If I make a
service available for someone to invoke (and here I would say that "make
available"
On Dec 7, 2005,
at 4:47 AM, Jones, Steve G wrote:
To add some mud
into the water…
Many Bus
architectures do “enrichment” of messages between consumer and producer,
including the invocation of other services to perform that enrichment (e.g
stock quote returns current price, enrichment provides the last ten days
closing price). They may also do calculations that result in the
non-connection or “empty” return from the service (e.g. if you call for
“last five minutes trades” after the market has closed… its an empty set).
So while I agree that the service consumer is key it’s sometimes
hard to identify the true consumer and the true producer of a service
within a virtualised bus.
Steve
From:
[mailto:]
Sent: 06 December
2005 19:09
To:
; ; ;
; ; ;
;
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
I agree with Ken.
The service
consumer is the key concept that indicates the entity that invoked the
service in the first place.
A brokering
service or service actor is merely a middle-man.
Wes
-----Original
Message-----
From: Ken Laskey
[mailto:]
Sent: December 6,
2005 2:02 PM
To:
; ; ;
; ; ;
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
I could argue
that a broker consumes the service on someone else's behalf. In
reality, service actor seems too nondescriptive because either the
consumer or the provider can be thought of as an actor.
Ken
At 01:45 PM
12/6/2005, wrote:
I hate to stir
things up a bit, but can you change the service consumer term to service
actor?
Since in the case
of brokering the service actor is not consuming but brokering a request to
another service.
The broker
service can be a service actor upon the service but might not really
consume any part of the service since it is a pass through.
But I guess this
is a matter of opinion.
- Dan
-----Original
Message-----
From: Ken Laskey
[ mailto:]
Sent: Tuesday,
December 06, 2005 10:39 AM
To: Duane
Nickull; Goran Zugic; Matt MacKenzie; MATHEWS, Tim; Sally St. Amand;
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
I think we need
to add some words to the RM to capture this discussion. We cover
part of this in the beginning of Section 3.2.1 but need to be more
specific that:
- a service
consumer can be a human or a software agent;
- a service
consumer can invoke any number of services (including a single service in
isolation) and can chain the output of some services to act as the input
of others;
- from the
perspective of a given service, the occurrence of such chaining would not
be visible;
- the service
consumer can be implementing a business process;
- the specific of
a business process do not change the basic SOA concepts as described in
the RM; however, the specific architecture that one designs and implements
will reflect the business process and make use of specific service
instances that corresponds to the real world effects that the business
process hopes to realize.
Now that said,
and in full appreciation that we agreed earlier that mechanisms which
combine services (e.g. choreography, orchestration) are out of scope, is
it sufficient for words, such as those suggested above, to be included
somewhere within the current discussion or do we need to pull it out into
a subsection on its own? As an example of the former, we tried to
deal with loose-coupling and coarse-grained with words at the end of
Section 2.1.
Ken
At 12:23 PM
12/6/2005, Duane Nickull wrote:
Goran:
I slightly
disagree with your assertions, probably based on semantics. For a
service to "participate" in a process, it would have to be aware of the
process (which many will not be). A better way to depict this may be
to state "services may be aggregated and used by processes" and "processes
may be represented/exposed as services". There are really no limits
to the number of layers that can be present. Attached is a UML CVD
depicting such.
A key rationale
of why process is not part of SOA is that services cannot see
process. They are not aware of whether they are being called as part
of a process vs. as an individual service. If the "s" part of SOA
cannot see or touch that, it cannot be part of the RM.
The chicken and
egg discussion you bring forward is a requirement for those building
services to strongly consider the business process when designing their
service infrastructure. Accordingly, it is not really part of the RM
for SOA yet I agree that it is a very important consideration.
For your messages
to get to the list, you must join as a "applicant" rather than an
"observer" as per OASIS process.
Duane
*******************************
Adobe Systems,
Inc. - http://www.adobe.com
Vice
Chair - UN/CEFACT http://www.uncefact.org/
Chair - OASIS SOA
Reference Model Technical Committee
Personal Blog -
http://technoracle.blogspot.com/
*******************************
From: Goran Zugic
[ mailto:]
Sent: Monday,
December 05, 2005 8:47 PM
To: Duane
Nickull; Matt MacKenzie; MATHEWS, Tim; Sally St. Amand;
Cc:
Subject: Re:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
Duane,
Thanks for the
response. Yes I would like to see the PPT. I hope you do not mind if I add
few more thoughts related to services and business processes:
Services
participate in a business process to add some value to it. They can be
governed and evaluated using business process metrics. One service can
participate in many business processes and provide value to each of them
according to the context within that process. As far as SOA is concerned
it is as important to know what the service does, how it can be
discovered, contacted, invoked, executed, etc. as it is to be able to use
it within the process context, measure it and assess its value from the
business process requirements point of view. SOA needs to avoid typical
new technology chicken and egg syndrome, e.g. companies not producing
services because there are no service friendly process definitions to use
them and not having SOA friendly process definitions because there are no
services to use. Services do not have to know if they will be involved in
the process upfront, they will be contacted on demand according to the
process script that is in effect, and they will be contacted, checked if
available, passed the arguments, collected the response and according to
their procedure left alone to wait for another call. The process execution
engine however needs to invoke the service according to both service
specific information and the process specific information.
Having just the
service specific information in a model covers only one part of the
picture and I think it is fine as long as that model is a pure service
model. However I find it difficult to understand that the SOA RM TC model
is a SOA reference model when it does not include other concepts of SOA.
Unfortunately it seems that we cannot get to the point where we could
agree on a minimal set of supported SOA concepts by a model to be the
SOA
RM. We do not
have to and I do not want to argue with you or anybody else in SOA RM TC.
I am just trying to see how our works can fit together in a most efficient
way. We obviously need more time to better understand each others thoughts
and ideas and I strongly believe that a constructive respectable
discussion is helpful for everybody.
By the way, do
you know what I am supposed to do to get my messages to the SOA RM list.
In spite of that I am the SOA RM TC observer I get a faliure notice
whenever I send a note to the SOA RM.
Goran
----- Original
Message -----
From: Duane
Nickull
To: Matt
MacKenzie ; ; MATHEWS, Tim ; Sally St. Amand ;
Cc:
Sent: Monday,
December 05, 2005 5:02 PM
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
Goran:
The service layer
enables the process layer over top of it, however during runtime, services
do not know if they are part of a process or being called individually (it
would generally be a bad idea to try to maintain the overall state of a
process within each service, although it could be done). For maximum
repurposing of services, it would be better to have the service as a
simple slave to the processes that may use it.
Accordingly, we
made a decision that BPM, Orchestration, choreography is not a core part
of the RM for SOA. We generally seem to agree that many SOA
implementations will include a layer of BPM over top. We are only
addressing the SOA model, not the model for the underlying or overarching
layers.
I have a PPT that
explains this in more detail if you are interested.
Duane
*******************************
Adobe Systems,
Inc. - http://www.adobe.com
Vice
Chair - UN/CEFACT http://www.uncefact.org/
Chair - OASIS SOA
Reference Model Technical Committee
Personal Blog -
http://technoracle.blogspot.com/
*******************************
From: Matt
MacKenzie [ mailto:]
Sent: Monday,
December 05, 2005 12:51 PM
To:
; MATHEWS, Tim; Sally St. Amand;
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
Process
orientation is only one of multiple potential integration with service
oriented architecture. SOA-RM is laying the foundation for durable
architecture based on the core concept of service orientation. We
recognize that process oriented architecture is a natural fit with service
orientation...but so are things like event orientation.
-matt
From:
[ mailto:]
Sent: Monday,
December 05, 2005 3:36 PM
To: MATHEWS, Tim;
Matt MacKenzie; Sally St. Amand;
Cc:
Subject: Re:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
I think that SOA
RM has done good job documenting well-known service related concepts and
defining some new ones.
I do not see
other details besides service and service-related concept definitions in
the current SOA RM committee draft right now. I look forward to seeing the
completion of the model you are working on with the bottom-up approach.
Business,
business processes and collaboration aspects of business are important to
address in the model what is not the case with the current content of the
SOA RM committee draft. By a business process I mean a generic business
process entity which has common components (activities, decisions, etc)
and relationships between them that can be used to model a business
process in any environment regardless of what business we support and
technology we use. I agree with Sally that a link between business
processes and services should be one of key requirements any SOA reference
model should try to meet.
I am not sure
what SOA with services brings to business when the link between the
business processes and services and overall business process semantics in
the SOA context are not considered to be important aspects in a SOA-based
reference model.
Goran
-----Original
Message-----
From: MATHEWS,
Tim [ mailto:]
Sent: Monday,
December 5, 2005 12:34 PM
To: 'Matt
MacKenzie', 'Sally St. Amand',
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
"Componentization"
Matt - I am not
sure what point you are trying to make by this? I agree with your
premise of a bottom up effort, as this was one of the operating
assumptions that was made from the beginning.
But, I am
confident it is the business environment that is independent from the
reference model.
TM
From: Matt
MacKenzie [ mailto:]
Sent: Monday,
December 05, 2005 11:58 AM
To: Sally St.
Amand;
Cc:
Subject: RE:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
"Componentization"
Sally,
A reference model
actually needs to be a bottom up effort. We leave the ever so
popular ?top-down? approach to folks like ebSOA J
We?re creating a
vocabulary and general understanding of what I hope we can call a
discipline of computer science in the future. This means, we need a
durable reference model that is not dependent on the current business
environment.
-matt
From: Sally St.
Amand [ mailto:]
Sent: Monday,
December 05, 2005 10:19 AM
To:
Cc:
Subject: Re:
[soa-rm] Proposal: Reorganization of SOA-RM Draft for Better
"Componentization"
Frank
This is in
response to your request on last week?s conference call, if anyone has
comments speak now. I also think that the recent comments on clarifying
sections are a reflection of my issues with the specification.
I agree with the
majority of points made/described in ver 10. My issues are with what is
not in this draft. Based on Fig 1 the Refe! rence Model is guided by
Reference Architectures, Concrete Architectures, Profile & Related
Models. They in turn account for requirements, motivation & goals.
This is creating a Reference Model from the bottom up. I believe a
Reference Model should reflect a top down approach.
The Reference
Model needs to reflect the environment, the strategy and the priorities of
the business/mission/collaboration. This will impact the
construction of services. A service is a business task or activity that is
realized through technology. The draft does a good job of describing how
that realization happens. But it doesn?t provide a sufficient link between
processes and services. The draft makes the point that the central focus
of! SOA is the task of business function?getting something done. A
business process is made up of tasks and activities to achieve a goal
(getting something done). The concept of creating the service from the
tasks and activities in a process is important. For example, where on the
continuum of fine grained to coarse grained should a particular service
be; this will affect interaction, reusability. The relationship between
processes and services needs to be in the Reference Model.
While I saw that
there is a note saying the glossary is still in flux, since one of the
objective of the Reference Model is a vocabulary, having less in the
glossary might be a better option. Is semantic integration a guiding
principle of SOA?
With respect to
conformance there needs to be business results. That is an SOA should
provide demonstrable mission accomplishments, e.g. ROI, match a
competitors distribution channel. SOA is not a technology. Conformance
should provide operational accomplishments, these should be measurable.
Sally
!
