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diff --git a/src/diagram/Statement.hpp b/src/diagram/Statement.hpp
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+/*
+ * Statement.h
+ *
+ *  Created on: Nov 23, 2017
+ *      Author: naopross
+ */
+
+#ifndef SRC_STATEMENT_H_
+#define SRC_STATEMENT_H_
+
+#include <string>
+
+namespace samb {
+
+
+/*  Possible types of statement, according to the NS diagram paper
+ * 
+ * PROCESS,
+ * DECISION,
+ * SWITCH,
+ * WHILE,
+ * UNTIL,
+ * SCOPE,
+ * PARALLEL,
+ */
+
+/* this class should behave like a std::list,  or a std::map storing the data
+ * with a tree structure, BUT it is not a tree because allows 2 notes to point
+ * at a single node
+ *
+ * Normal Tree:          Statements:
+ * A - B - C - D         A - B - C - D - G
+ *     \                     \      /
+ *      E - F                 E - F
+ *
+ * Because a statement contains branching elmeents. (if / switch)
+ */
+class Statement {
+private:
+	Statement *next;
+	Statement *prev;
+
+public:
+	const enum Type {
+		PROCESS,
+		DECISION,
+		SWITCH,
+		WHILE,
+		UNTIL,
+		SCOPE,
+		PARALLEL,
+	} m_type;
+
+	Statement(Type type, Statement *prev): m_type(type), m_prev(prev);
+	virtual ~Statement();
+};
+
+} /* namespace samb */
+
+#endif /* SRC_STATEMENT_H_ */