diff --git a/src/main/java/common/CanBeTagged.java b/src/main/java/common/CanBeTagged.java
new file mode 100644
index 0000000000000000000000000000000000000000..1439b08bdf413ecd842650a95a2744eb20851b0c
--- /dev/null
+++ b/src/main/java/common/CanBeTagged.java
@@ -0,0 +1,66 @@
+/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
+ *
+ * ludovic.apvrille AT enst.fr
+ *
+ * This software is a computer program whose purpose is to allow the
+ * edition of TURTLE analysis, design and deployment diagrams, to
+ * allow the generation of RT-LOTOS or Java code from this diagram,
+ * and at last to allow the analysis of formal validation traces
+ * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
+ * from INRIA Rhone-Alpes.
+ *
+ * This software is governed by the CeCILL license under French law and
+ * abiding by the rules of distribution of free software. You can use,
+ * modify and/ or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ *
+ * As a counterpart to the access to the source code and rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty and the software's author, the holder of the
+ * economic rights, and the successive licensors have only limited
+ * liability.
+ *
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading, using, modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean that it is complicated to manipulate, and that also
+ * therefore means that it is reserved for developers and experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and, more generally, to use and operate it in the
+ * same conditions as regards security.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+
+
+
+
+package common;
+
+import java.util.List;
+
+/**
+ * Class CanBeTagged
+ * Creation: 12/07/2024
+ * @version 1.1 12/07/2024
+ * @author Ludovic APVRILLE
+ */
+public interface CanBeTagged {
+
+ void addTag();
+ void removeAllTags();
+ void removeTag(Tag g);
+
+ void removeTag(String tag);
+
+ List<Tag> getAllTags();
+
+ boolean hasTag(Tag g);
+
+ boolean hasTag(String tag);
+
+}
diff --git a/src/main/java/common/Tag.java b/src/main/java/common/Tag.java
new file mode 100644
index 0000000000000000000000000000000000000000..9cabfdf96dc7fd582a96c2d72046d1b4b355fad7
--- /dev/null
+++ b/src/main/java/common/Tag.java
@@ -0,0 +1,61 @@
+/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
+ *
+ * ludovic.apvrille AT enst.fr
+ *
+ * This software is a computer program whose purpose is to allow the
+ * edition of TURTLE analysis, design and deployment diagrams, to
+ * allow the generation of RT-LOTOS or Java code from this diagram,
+ * and at last to allow the analysis of formal validation traces
+ * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
+ * from INRIA Rhone-Alpes.
+ *
+ * This software is governed by the CeCILL license under French law and
+ * abiding by the rules of distribution of free software. You can use,
+ * modify and/ or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ *
+ * As a counterpart to the access to the source code and rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty and the software's author, the holder of the
+ * economic rights, and the successive licensors have only limited
+ * liability.
+ *
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading, using, modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean that it is complicated to manipulate, and that also
+ * therefore means that it is reserved for developers and experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and, more generally, to use and operate it in the
+ * same conditions as regards security.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+
+
+
+
+package common;
+
+/**
+ * Class Tag
+ * Creation: 12/07/2024
+ * @version 1.1 12/07/2024
+ * @author Ludovic APVRILLE
+ */
+public class Tag {
+
+ private String tag;
+
+ public Tag(String _tag) {
+ tag = _tag;
+ }
+
+ public String getTag() {
+ return tag;
+ }
+}
diff --git a/src/main/java/common/Tags.java b/src/main/java/common/Tags.java
new file mode 100644
index 0000000000000000000000000000000000000000..57a8cd2a875c73ee8ddf6365690b184ece74c17e
--- /dev/null
+++ b/src/main/java/common/Tags.java
@@ -0,0 +1,81 @@
+/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
+ *
+ * ludovic.apvrille AT enst.fr
+ *
+ * This software is a computer program whose purpose is to allow the
+ * edition of TURTLE analysis, design and deployment diagrams, to
+ * allow the generation of RT-LOTOS or Java code from this diagram,
+ * and at last to allow the analysis of formal validation traces
+ * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
+ * from INRIA Rhone-Alpes.
+ *
+ * This software is governed by the CeCILL license under French law and
+ * abiding by the rules of distribution of free software. You can use,
+ * modify and/ or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ *
+ * As a counterpart to the access to the source code and rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty and the software's author, the holder of the
+ * economic rights, and the successive licensors have only limited
+ * liability.
+ *
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading, using, modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean that it is complicated to manipulate, and that also
+ * therefore means that it is reserved for developers and experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and, more generally, to use and operate it in the
+ * same conditions as regards security.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+
+
+
+
+package common;
+
+import java.util.ArrayList;
+
+/**
+ * Class Tags
+ * Creation: 12/07/2024
+ * @version 1.1 12/07/2024
+ * @author Ludovic APVRILLE
+
+ */
+public class Tags {
+
+ private ArrayList<Tag> tags;
+
+ public Tags() {
+ tags = new ArrayList<>();
+ }
+
+ public boolean hasTag(String s) {
+ return getTag(s) != null;
+ }
+
+ public void addTag(String s) {
+ if (!hasTag(s)) {
+ Tag newTag = new Tag(s);
+ tags.add(newTag);
+ }
+ }
+
+ public Tag getTag(String _tag) {
+ for(Tag g: tags) {
+ if (g.getTag().compareTo(_tag) == 0) {
+ return g;
+ }
+ }
+ return null;
+ }
+
+}