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diff --git a/sandbox/kgoodson/mappingFramework/sdo-snapshot/src/main/java/com/agfa/hap/sdo/mapper/PropertyAccessor.java b/sandbox/kgoodson/mappingFramework/sdo-snapshot/src/main/java/com/agfa/hap/sdo/mapper/PropertyAccessor.java
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+++ b/sandbox/kgoodson/mappingFramework/sdo-snapshot/src/main/java/com/agfa/hap/sdo/mapper/PropertyAccessor.java
@@ -0,0 +1,45 @@
+/**
+ *
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package com.agfa.hap.sdo.mapper;
+
+import java.util.Collection;
+
+import com.agfa.hap.sdo.DataMapper;
+import com.agfa.hap.sdo.Property;
+import com.agfa.hap.sdo.SnapshotDefinition;
+
+/**
+ * Interface that allows property values to be accessed in a generic way from any instance.
+ * Typically propertyaccessors will be registered in a sdo-propertyaccessors.properties file which is read by ExtendablePropertyAccessorBuilder
+ * 
+ * To allow for efficient retrieval, some properties are always accessed in bulk. A typical
+ * example is a property for which a query needs to be made.
+ * 
+ * @author AMOCZ
+ * 
+ */
+public interface PropertyAccessor {
+
+	Object getValue(Object instance, Property property, DataMapper dataMapper);
+	void setValue(Object instance, Property property, Object value, DataMapper dataMapper);
+
+	boolean isBulkAccessor();
+	Collection<?> getValues(Collection<?> instances, Property property, SnapshotDefinition def, DataMapper dataMapper);
+}