This document will give the main rules and instructions for
version control of models.
|Saved model||Model, which must be saved when a new model has taken place.|
|Model modification||Every modification of a model. Please compare FORMAL MODIFICATION and REVISION.|
|Formal modifications||Modifications that WILL NOT have any effect on the contents of data of the model.|
|Revision (of the model)||Modifications that will have effect on the contents of data of the model.|
|Revision position, Rev (revision position of model)||Additional notation of models name, which is specifying a particular model.|
2. REVISION OR FORMAL MODIFICATION
Model modifications are divided into two categories:
Revision is a modification, addition or deletion of the contents of data in a
When the contents of data of a model is changed a new model is taken place.
Every model is identified with a notation, called "revision position"
(abbreviated Rev-position or Rev). The revision is marked with a new revision
position according to part 3.
2.2 Formal modification
Formal modification is a modification that WILL NOT have any effect on the contents of data of the model e.g.
A formal modification is marked with the new date. Se items 3 and 3.2. If you are in doubt whether or not a formal modification is of essence or not, choose
3. REVISION POSITION
The revision position is the characteristics of model. These are included in
COMPLETE identity of the model and make up the MODEL NAME + REVISION POSITION.
|Name of model||Revision Position|
3.1 REVISION POSITION FOR (ORIGINAL) MODEL
Revision position for fixed (original) model should be in CAPITAL LETTERS in
alphabetical order A-Z, AA-Z. The letters I, O, P, Q, R and W must not be used.
First edition should be "A".
A First fixed edition
B Revision 1
C Revision 2
In the model should the date of present Revision position be given.
3.2 FORMALLY MODIFIED MODEL
A formal modification is indicated by a NEW DATE. The revision position should
not be changed.
3.3 REVISION POSITION FOR PRELIMINARY MODEL
The revision position for a preliminary model, that is a model during
development is given the letter P as notification (P is for preliminary). The P
is followed by the same letter as in the next revision position as well as a
number that will differ the preliminary model.
1997-04-23 Björn Norén