// ~->[DNET-1]->~

// File created by Norsys using Netica 1.05a on Feb 06, 1998 at 05:05:25.

bnet Zhang93_p55 {
comment = "The 'Two Spy' example of a non-SDDN decision network.\n\
	Policies must be found for 2 agents which will then go into \
	enemy territory and not be able to communicate with each \
	other.  Based on the type of enemy movement they observe, \
	each must decide whether to send a report back to home base, \
	knowing they may be dangerously exposed if they do, and that \
	the report might be useless if the other agent has already \
	reported.\n\
	This network contains only dependence information; it has no \
	numerical probabilities.\n\
	From Lian Wen (Nevin) Zhang's 1993 PhD thesis, University of \
	British Columbia (also UBC Computer Science tech. report \
	94-8, page 55)";
whochanged = "BoerlageB";
whenchanged = 767571672;

visual V2 {
	defdispform = LABELBOX;
	nodelabeling = TITLE;
	nodefont = font {shape= "Arial"; size= 10;};
	linkfont = font {shape= "Arial"; size= 9;};
	commentfont = font {shape= "Arial"; size= 10;};
	windowposn = (153, 35, 574, 418);
	resolution = 72;
	drawingbounds = (1152, 752);
	showpagebreaks = FALSE;
	usegrid = TRUE;
	gridspace = (6, 6);
	};

node M {
	kind = NATURE;
	discrete = TRUE;
	numstates = 2;
	parents = ();
	title = "Enemy Movement";
	visual V2 {
		center = (186, 36);
		height = 5;
		};
	};

node O1 {
	kind = NATURE;
	discrete = TRUE;
	numstates = 2;
	parents = (M);
	title = "Observed by Agent 1";
	visual V2 {
		center = (84, 90);
		height = 1;
		};
	};

node O2 {
	kind = NATURE;
	discrete = TRUE;
	numstates = 2;
	parents = (M);
	title = "Observed by Agent 2";
	visual V2 {
		center = (288, 90);
		height = 6;
		};
	};

node R1 {
	kind = DECISION;
	discrete = TRUE;
	numstates = 2;
	parents = (O1);
	title = "Agent 1 Reports";
	visual V2 {
		center = (84, 150);
		height = 2;
		};
	};

node E1 {
	kind = NATURE;
	discrete = TRUE;
	numstates = 2;
	parents = (R1);
	title = "Agent 1 Exposed";
	visual V2 {
		center = (84, 216);
		height = 3;
		};
	};

node R2 {
	kind = DECISION;
	discrete = TRUE;
	numstates = 2;
	parents = (O2);
	title = "Agent 2 Reports";
	visual V2 {
		center = (288, 150);
		height = 7;
		};
	};

node E2 {
	kind = NATURE;
	discrete = TRUE;
	numstates = 2;
	parents = (R2);
	title = "Agent 2 Exposed";
	visual V2 {
		center = (288, 216);
		height = 8;
		};
	};

node V {
	kind = UTILITY;
	discrete = FALSE;
	parents = (M, R1, E1, R2, E2);
	title = "Value";
	visual V2 {
		center = (186, 276);
		height = 4;
		link 2 {
			path = ((92, 159), (150, 210), (182, 268));
			};
		link 4 {
			path = ((279, 159), (216, 210), (189, 268));
			};
		};
	};
};