diff --git a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/MultiInstanceAnnotationValueProviderBase.java b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/MultiInstanceAnnotationValueProviderBase.java
index 832cc75bada4778036a6f3c1285dba8ba7a3b869..97f068506ec790b6ba2e5716735a4c4640bb171d 100644
--- a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/MultiInstanceAnnotationValueProviderBase.java
+++ b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/MultiInstanceAnnotationValueProviderBase.java
@@ -51,13 +51,15 @@ public abstract class MultiInstanceAnnotationValueProviderBase<T extends IAnnota
 		extends SingleEStructuralFeatureValueProviderBase<T> {
 
 	/**
-	 * {@link EDataType} of the value type V of the underlying EMap<String, V> storing the annotation
+	 * {@link EDataType} of the value type V of the underlying EMap<String, V> storing the
+	 * annotation
 	 * instances.
 	 */
 	EDataType valueDataType;
 
 	/**
-	 * {@link EFactory} to construct (in particular from a {@link String} representation instances of
+	 * {@link EFactory} to construct (in particular from a {@link String} representation instances
+	 * of
 	 * the value type V of the underlying EMap<String, V> storing the annotation instances.
 	 */
 	EFactory valueFactory;
@@ -90,13 +92,22 @@ public abstract class MultiInstanceAnnotationValueProviderBase<T extends IAnnota
 
 	}
 
+	/**
+	 * Sets a value for a multi-instance {@link IAnnotatedSpecification} from a {@link String}
+	 * representation of the input.
+	 */
+	@SuppressWarnings("unchecked")
+	private <V> void setAnnotationValueFromString(String value, T specification, String instanceKey) {
+		((EMap<String, V>)getAnnotationValue(specification)).put(instanceKey,
+				(V)valueFactory.createFromString(valueDataType, value));
+	}
+
 	/** {@inheritDoc} */
 	@SuppressWarnings("unchecked")
 	@Override
 	public <V> void setAnnotationValue(V value, T specification, String instanceKey) {
 		if(value instanceof String) {
-			((EMap<String, V>)getAnnotationValue(specification)).put(instanceKey,
-					(V)valueFactory.createFromString(valueDataType, (String)value));
+			setAnnotationValueFromString((String)value, specification, instanceKey);
 		} else {
 			((EMap<String, V>)getAnnotationValue(specification)).put(instanceKey, value);
 		}
@@ -104,11 +115,9 @@ public abstract class MultiInstanceAnnotationValueProviderBase<T extends IAnnota
 	}
 
 	/** {@inheritDoc} */
-	@SuppressWarnings("unchecked")
 	@Override
 	public void setAnnotationValue(String value, T specification, String instanceKey) {
-		((EMap<String, String>)getAnnotationValue(specification)).put(instanceKey, value);
-
+		setAnnotationValueFromString(value, specification, instanceKey);
 	}
 
 	/** {@inheritDoc} */
diff --git a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/SingleEStructuralFeatureValueProviderBase.java b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/SingleEStructuralFeatureValueProviderBase.java
index 1a33ffcc44db346facab116058962df4acc49d85..1cbd3bb58fbc7f7d3c805f9731cdb47adf21754b 100644
--- a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/SingleEStructuralFeatureValueProviderBase.java
+++ b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/annotation/valueprovider/SingleEStructuralFeatureValueProviderBase.java
@@ -95,20 +95,32 @@ public abstract class SingleEStructuralFeatureValueProviderBase<T extends IAnnot
 		this.structuralFeatureDefaultValue = structuralFeatureDefaultValue;
 	}
 
+	/**
+	 * Sets a value for a {@link IAnnotatedSpecification} from a {@link String} representation of
+	 * the input.
+	 */
+	private <V> void setAnnotationValueFromString(String value, T specification) {
+		specification.eSet(
+				structuralFeature,
+				structuralFeatureFactory.createFromString(
+						((EAttribute)structuralFeature).getEAttributeType(), value));
+	}
+
 	/** {@inheritDoc} */
 	@Override
 	public <U> void setAnnotationValue(U value, T specification) throws Exception {
-		specification.eSet(structuralFeature, value);
+		if(value instanceof String) {
+			setAnnotationValueFromString((String)value, specification);
+		} else {
+			specification.eSet(structuralFeature, value);
+		}
 	}
 
 	/** {@inheritDoc} */
 	@Override
 	public void setAnnotationValue(String value, T specification) throws Exception {
 		if(structuralFeature instanceof EAttribute) {
-			setAnnotationValue(
-					structuralFeatureFactory.createFromString(
-							((EAttribute)structuralFeature).getEAttributeType(), value),
-					specification);
+			setAnnotationValueFromString(value, specification);
 		} else {
 			throw new Exception(
 					"setAnnotationValue(String, T) is not supported / has not been implemented the annotation type " +