want to protect a 
ve have a complex 
ented on the figure 
tements). 
  
CONSTRAINT. 
create a hyperclass 
h carries, among 
MULA; all classes 
inherit of the 
expressed in an 
being rather simple, 
v. This body may 
ips belonging to the 
CANNOT, linking 
ts. 
X 
MISES 
CANNOT | 
JLA 
STRAINT and its 
STRAINT has to be 
are various a.d.t.; a 
According to a 
theory of categories 
be associated with 
uild these necessary 
ositionning (Titeux, 
/ork structuring, the 
:d tool. 
In the following example, shown on the figure 16, 
we want to express that any arc of the water network 
cannot intersect any arc of the medium-voltage 
network. Of course, it requires some computation in 
3-D in order to determine the superimposition of 
VERTEX 
  
   
  
  
  
  
  
  
  
  
URNHURE — VERTEX 
   
  
   
Ar 
+ 
X 
= 
VHVAREA 
  
  
  
    
arcs, and the distance between the two superimposed 
auxiliary points. The structure of figure 15 uses 
simultaneously the concepts of prototype, of 
structure, and of constraint. 
  
LINEAR 
VOMPONEN 
POINT 
[pa uem 
VERY HIGH 
| VOLTAGE 
HIGH 
| VOLTAGE 
  
Ww. ue = 
VERTEX: 
FURNITURE 
  
  
| | end 
; [M MV AREA 
MV:VERTEX 
+ 
À 
  
  
   
   
  
COMPONENT 
  
NV: 
POIN 
FURNITURE: 
STRUCTURE 
MEDIUM 
VOLTAGE 
  
  
  
  
  
  
ly 
A 
ufi 
LV-VERTEX n 
  
  
  
  
   
  
  
  
  
  
  
x LOW 
:( VOLTAGE 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
LV:AREA 
A 
WATER: | 
VERTEX LA S 
FURNITURE LH 
Le] mr 
LA | WATER 
[xl WATER: 
AREA WATER:ARC \ 
WATER: am 
VERTEX : 
POINT 
\ ) C FURNITURE 
eie, oos m 
WATER: 
LINEAR 
COMPONENT 
N 
Fig. 16 : A complex constraint working on two networks. 
45 
| 
| 
| 
| 
| 
| 
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