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| Simple:: Message Sets theorotical doubts. |
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| _novice_ |
 Posted: Sat Oct 30, 2004 8:34 pm Post subject: Simple:: Message Sets theorotical doubts. |
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Novice
Joined: 22 Oct 2004
Posts: 15
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Hi Gurus
In Message Sets::
1. A Message definition is supposed to be based on a single compound type.
2. A message is built up of Types and Elements.
Arent these 2 statement contradicting..?
What I am getting confused with is that when I define a new Message in a message set , I can only base that Message definition on a compound type. Which impies that my message structure is fundamentally based on the compound type skeleton. So If I add more elements , how is my message going to be..? Is it like a "compound type + a couple of elements" . .?
No hurries , pls take ur time..
Thnx in advance |
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| fjb_saper |
| Posted: Sun Oct 31, 2004 4:40 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Just a little bit of speculation and let the experts correct me if I am wrong:
The base type of the message would be compound (i.e. structure)
The base type of the constituants of a compound would be Types
Now an element would be made of Types/compound
A message would always be a compound because made of elements...
Type = atomical set (String, numerical, etc...)
Element= construct representing a structure made of types and/or elements
Compound= collection of elements.
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| kimbert |
| Posted: Mon Nov 01, 2004 3:08 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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There's no contradiction. A type is either simple ( i.e. a scalar value like integer or string) or compound ( i.e. it contains other elements, or even embedded types).
Almost all messages contain a hierarchy of simple data items, so we impose the restriction that all messages are based on a compound type.
When the docs say
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| A message is built up of Types and Elements |
it just means that a message is a hierarchy of data, defined by a compound type.
By the way, I believe you are a 2.1 user, so I've used 2.1 terminology. In version 5, a message is based on a global complex element. |
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