A fully working version of the scheduling language with added examples

examples/petrinet/models/rules/all_incoming.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `True`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (p -> t)

examples/petrinet/models/rules/all_incomming.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `True`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (p -> t)

examples/petrinet/models/rules/all_outgoing.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `True`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (t -> p)

examples/petrinet/models/rules/increase_outgoing.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `get_value(this) + 1`;
+}
+:RAM_pn_of (ps -> p)
+
+# An outgoing arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (t -> p)

examples/petrinet/models/rules/input_without_token.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `get_value(this) == 0`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (p -> t)

examples/petrinet/models/rules/places.od

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+# A place with no tokens:
+
+p:RAM_PNPlace

examples/petrinet/models/rules/reduce_incoming.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `get_value(this) -1`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (p -> t)

examples/petrinet/models/rules/reduce_incomming.od

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+# A place with no tokens:
+
+p:RAM_PNPlace
+ps:RAM_PNPlaceState {
+  RAM_numTokens = `get_value(this) -1`;
+}
+:RAM_pn_of (ps -> p)
+
+# An incoming arc from that place to our transition:
+
+t:RAM_PNTransition
+
+:RAM_arc (p -> t)

examples/petrinet/models/rules/transition.od

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+t:RAM_PNTransition