diff --git a/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/Activator.java b/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/Activator.java
index 8c9e7b587aac9eecd16c7d4a0027a188cde101f8..6cdb5b58b7ac1f271e3c960c431020b9273f73c9 100644
--- a/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/Activator.java
+++ b/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/Activator.java
@@ -19,6 +19,7 @@ import org.eclipse.ui.plugin.AbstractUIPlugin;
 import org.osgi.framework.BundleContext;
 import org.polarsys.chess.checkers.core.checkerManager.CheckerManager;
 import org.polarsys.chess.checkers.core.checkerManager.CheckersContainer;
+import org.polarsys.chess.checkers.core.impl.IdentifiersChecker;
 import org.polarsys.chess.checkers.core.impl.NameDistance;
 import org.polarsys.chess.checkers.core.impl.StateStatus;
 import org.polarsys.chess.checkers.core.impl.TestChecker1;
@@ -82,6 +83,7 @@ public class Activator extends AbstractUIPlugin {
 
 		new NameDistance(1, 1);
 		new StateStatus();
+		new IdentifiersChecker();
 
 		started = true;
 	}
diff --git a/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/core/impl/IdentifiersChecker.java b/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/core/impl/IdentifiersChecker.java
new file mode 100644
index 0000000000000000000000000000000000000000..62be6d48a9f860af1a2bc4cacab10415d4c6fb58
--- /dev/null
+++ b/plugins/org.polarsys.chess.checkers/src/org/polarsys/chess/checkers/core/impl/IdentifiersChecker.java
@@ -0,0 +1,154 @@
+package org.polarsys.chess.checkers.core.impl;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.log4j.Logger;
+import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.emf.common.util.BasicEList;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.uml2.uml.Behavior;
+import org.eclipse.uml2.uml.Class;
+import org.eclipse.uml2.uml.NamedElement;
+import org.eclipse.uml2.uml.Operation;
+import org.eclipse.uml2.uml.Package;
+import org.eclipse.uml2.uml.Port;
+import org.eclipse.uml2.uml.Property;
+import org.polarsys.chess.checkers.core.checkerManager.Checker;
+import org.polarsys.chess.checkers.core.checkerManager.CheckerMessage;
+import org.polarsys.chess.contracts.profile.chesscontract.util.EntityUtil;
+
+public class IdentifiersChecker extends Checker {
+	protected Package systemViewPackage;
+	private static final Logger logger = Logger.getLogger(IdentifiersChecker.class);
+	private static final String checkerName = "IdentifierChecker";
+
+	/**
+	 * Default constructor
+	 */
+	public IdentifiersChecker() {
+		super(checkerName, getTags());
+	}
+
+	/**
+	 * Creates the checker with the given priority.
+	 * @param priority the priority
+	 */
+	public IdentifiersChecker(int priority) {
+		super(checkerName, getTags(), priority);
+	}
+
+	/**
+	 * Constructor with explicit tags.
+	 * @param tags the tags identifying this checker
+	 */
+	public IdentifiersChecker(Set<String> tags) {
+		super(checkerName, tags);
+	}
+
+	/**
+	 * Constructor with explicit tags and priority.
+	 * @param tags the tags identifying this checker
+	 * @param priority the priority
+	 */
+	public IdentifiersChecker(Set<String> tags, int priority) {
+		super(checkerName, tags, priority);
+	}
+
+	@Override
+	public List<CheckerMessage> check(IProgressMonitor monitor) throws Exception {
+		List<CheckerMessage> messages = new ArrayList<CheckerMessage>();
+		Collection<Class> blocks = null;
+		try {
+			blocks = (Collection<Class>) EntityUtil.getInstance().getAllClasses(systemViewPackage);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+		monitor.beginTask(checkerName, blocks.size());
+		for (Class block : blocks) {
+			messages.addAll(processBlock(block));
+			if (monitor.isCanceled())
+				throw new Exception("Checker interrupted");
+			monitor.worked(1);
+		}
+		return messages;
+	}
+
+	/**
+	 * Processes the given block.
+	 * 
+	 * @param block
+	 *            the block to process
+	 * @return a list of messages
+	 */
+	protected List<CheckerMessage> processBlock(Class block) {
+		final EList<NamedElement> elements = filterElements(block);
+		return processElements(elements);
+	}
+
+	/**
+	 * Processes the given list of elements.
+	 * 
+	 * @param block
+	 *            the list to process
+	 * @return a list of warnings
+	 */
+	protected List<CheckerMessage> processElements(EList<NamedElement> elements) {
+		List<CheckerMessage> messages = new ArrayList<CheckerMessage>();
+
+		for (NamedElement element : elements) {
+			final String name = element.getName();
+			logger.debug("Processing " + name);
+			if (!isValidId(name)) {
+				logger.debug("The element name is not a valid identifier: " + name);
+				final String msg = "The element name is not a valid identifier: " + name;
+				messages.add(new CheckerMessage(msg, IMarker.SEVERITY_WARNING, element, checkerName));
+			}
+		}
+		return messages;
+	}
+
+	protected boolean isValidId(String id) {
+		return javax.lang.model.SourceVersion.isIdentifier(id) && (!javax.lang.model.SourceVersion.isKeyword(id));
+	}
+	
+	/**
+	 * Creates the list of elements to be analized (incuding the block itself). Can be overridden if necessary.
+	 * @param elements
+	 * @return the filtered elements
+	 */
+	protected EList<NamedElement> filterElements(Class block) {
+		final EList<Property> attributes = block.getOwnedAttributes();
+		final EList<Operation> operations = block.getOwnedOperations();
+		final EList<Behavior> behaviors = block.getOwnedBehaviors();
+		final EList<Port> ports = block.getOwnedPorts();
+
+		final EList<NamedElement> elements = new BasicEList<NamedElement>(attributes.size() + 
+				operations.size() + behaviors.size() + ports.size() + 1);
+		elements.addAll(attributes);
+		elements.addAll(operations);
+		elements.addAll(behaviors);
+		elements.addAll(ports);
+		elements.add(block);
+		return elements;
+	}
+
+	private static Set<String> getTags() {
+		Set<String> tags = new HashSet<String>();
+		tags.add("fast");
+		tags.add("warnings");
+		tags.add("sysml");
+		return tags;
+	}
+	
+	@Override
+	public void init() throws Exception {
+		systemViewPackage = EntityUtil.getInstance().getCurrentSystemView();
+	}
+}