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diff --git a/sdo-java/branches/sdo-java-M2/sdo-api/src/main/java/commonj/sdo/Property.java b/sdo-java/branches/sdo-java-M2/sdo-api/src/main/java/commonj/sdo/Property.java
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+++ b/sdo-java/branches/sdo-java-M2/sdo-api/src/main/java/commonj/sdo/Property.java
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+/**
+ * <copyright>
+ *
+ * Service Data Objects
+ * Version 2.0
+ * Licensed Materials - Property of BEA and IBM
+ *
+ * (c) Copyright BEA Systems, Inc. and International Business Machines Corp 2005.  All rights reserved.
+ *
+ * </copyright>
+ * 
+ */
+
+package commonj.sdo;
+
+import java.util.List;
+
+/**
+ * A representation of a Property in the {@link Type type} of a {@link DataObject data object}.
+ */
+public interface Property
+{
+  /**
+   * Returns the name of the Property.
+   * @return the Property name.
+   */
+  String getName();
+  
+  /**
+   * Returns the type of the Property.
+   * @return the Property type.
+   */
+  Type getType();
+  
+  /**
+   * Returns whether the Property is many-valued.
+   * @return <code>true</code> if the Property is many-valued.
+   */
+  boolean isMany();
+  
+  /**
+   * Returns whether the Property is containment, i.e., whether it represents by-value composition.
+   * @return <code>true</code> if the Property is containment.
+   */
+  boolean isContainment();
+  
+  /**
+   * Returns the containing type of this Property.
+   * @return the Property's containing type.
+   * @see Type#getProperties()
+   */
+  Type getContainingType();
+
+  /**
+   * Returns the default value this Property will have in a {@link DataObject data object} where the Property hasn't been set.
+   * @return the default value.
+   */
+  Object getDefault();
+
+  /**
+   * Returns true if values for this Property cannot be modified using the SDO APIs.
+   * When true, DataObject.set(Property property, Object value) throws an exception.
+   * Values may change due to other factors, such as services operating on DataObjects.
+   * @return true if values for this Property cannot be modified.
+   */
+  boolean isReadOnly();
+
+  /**
+   * Returns the opposite Property if the Property is bi-directional or null otherwise.
+   * @return the opposite Property if the Property is bi-directional or null
+   */
+  Property getOpposite();
+
+  /**
+   * Return a list of alias names for this Property.
+   * @return a list of alias names for this Property.
+   */
+  List /*String*/ getAliasNames();
+}