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SEPIA provides implementations for various types of Petri nets. Along Place/Transition-nets, it supports Petri nets with distinguishable token colors and defines coloured workflow nets, where coloured tokens are interpreted as data elements used during process execution. To support information flow analysis of processes, SEPIA defines so-called IF-Nets, tailored for security-oriented workflow modeling which enable users to assign security-levels (HIGH, LOW) to transitions, data elements and persons/agents participating in the process execution.

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		RELAX NG implementation of the Petri Net Type Definition for
		IF-Nets. This PNTD re-defines the value of nettype.uri for
		IF-Nets.
		
		File name: ifnet.pntd
		Version: 2014
		(c) 2014
		Adrian Lange
		IIG Telematics
		University of Freiburg
		Germany
	

	
		The IF-Net type definition.
		This document also declares its namespace.
		
			T. Stocker, F. Böhr: IF-Net: A Meta-model for Security-oriented Process Specification. University of Freiburg. 2013.
		
	
	
	
	
	

	
		
			The URI value for the net type attribute, declaring the type of IF-Nets.
		
		
			http://ifnml.process-security.de/grammar/v1.0/ifnet
		
	

	
		
			Access function of a transition. A transition has 
			zero or more of these.
		
		
			
				
				
			
		
	

	
		
			An element declaring the positions of the subject clearances and of the token labels.
		
		
			
				
					
				
				
					
				
			
		
	

	
		
			Label definition for the initial marking in CWNs.
			It consists of the element initialMarking containing
			an non-negative integer value for the amount of
			control-flow tokens.
		
		
			
				
					
						
					
				
				
				
			
		
	

	
		
			A place of a CWN may have an initial marking of
			control flow tokens and color tokens and a capacity
			for the token colors.
		
		
			
			
		
	

	
		
			A transition of an IF-Net may be silent and has a transition type, a
			subject and may have an access function.
		
		
			
			
			
			
				
					
						
					
					
				
			
		
	

	
		
			Label definition for the arc inscriptions in IF-nets.
			It consists of the element inscription containing
			an non-negative integer value for the amount of
			control-flow tokens and a set of color token names.
		
		
			
				
					
				
				
				
			
		
	

	
		
			An arc of a colored workflow net may have an inscription.
		
		
	

	
		
			Adds a list of color labels with their specific RGB representation.
			Adds the graphical information for token labels and subject clearances,
			the token color capacity, and a list of color labels with their
			specific RGB representation.
		
		
			
			
				
			
		
	
        
        

	
		
			A color label, represented as a string value.
			Its sub-elements occur in any order.
		
		
			
		
	

	
		
			Color set used in the initial marking of places and the inscription of arcs.
			It consists of color elements for each color other than black.
		
		
			
				
					
				
			
		
	

	
		
			An annotation graphics  element for the subject descriptor of a transition.
			Its sub-elements occur in any order.
			It contains the standard annotation content.
		
		
			
		
	

	
		
			An access mode label, represented as some boolean values.
			Its sub-elements occur in any order.
		
		
			
				
					
						
					
				
				
					
						
					
				
				
					
						
					
				
				
					
						
					
				
			
		
	

	
		
			A transition type label, represented as an
			enum value with the choice between "regular"
			and "declassification".
			Its sub-elements occur in any order.
		
		
			
				regular
				declassification
			
		
	

	
		
			A list assigning a RGB color representation to each token label.
		
		
			
				
			
		
	

	
		
			A list entry assigning a RGB color representation to a token label.
		
		
			
				
				
			
		
	

	
		
			A RGB color element containing an integer value for red, green and blue.
			Its sub-elements occur in any order.
		
		
			
				
				
				
			
		
	

	
		
			A color value must be an integer value of the interval [0; 255].
		
		
			0
			255
		
	

	
		
			A list entry for places assigning a token color to capacity.
		
		
			
				
				
					
				
			
		
	

	
		
			A list declaring the capacity per token color for a place.
		
		
			
				
			
		
	

	
		
			The silent element can contain either the value true or false.
		
		
			
				true
				false