RELAX NG implementation of Petri Net Type Definition for Symmetric nets. This PNTD re-defines the value of nettype.uri for Symmetric nets and the grammars it needs for defining that type. File name: symmetricnet.rng Version: 2009 (c) 2007-2009 Lom Hillah (AFNOR) Revision: July 2008 - L.H Symmetric nets grammar uses the following grammars: HL Core Structure, Cyclic Enumerations, Finite Enumerations, Finite Integers, Booleans, Multisets. Dots and Partitions. We re-define the URI value for the net type attribute, declaring the type of Symmetric nets. http://www.pnml.org/version-2009/grammar/symmetricnet