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diff --git a/src/main/java/org/onap/schema/RelationshipSchema.java b/src/main/java/org/onap/schema/RelationshipSchema.java
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+/**
+ * ============LICENSE_START=======================================================
+ * Gizmo
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property.
+ * Copyright © 2017 Amdocs
+ * All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.schema;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import org.codehaus.jackson.map.ObjectMapper;
+import org.onap.crud.exception.CrudException;
+
+import java.io.IOException;
+import java.util.*;
+import java.util.stream.Collectors;
+import javax.ws.rs.core.Response.Status;
+
+
+public class RelationshipSchema {
+  private static final Gson gson = new GsonBuilder().create();
+
+  public static final String SCHEMA_SOURCE_NODE_TYPE = "from";
+  public static final String SCHEMA_TARGET_NODE_TYPE = "to";
+  public static final String SCHEMA_RELATIONSHIP_TYPE = "label";
+  public static final String SCHEMA_RULES_ARRAY = "rules";
+
+
+  private Map<String, Map<String, Class<?>>> relations = new HashMap<>();
+  /**
+   * Hashmap of valid relationship types along with properties.
+   */
+  private Map<String, Map<String, Class<?>>> relationTypes  = new HashMap<>();
+
+
+  public RelationshipSchema(List<String> jsonStrings) throws CrudException, IOException {
+    String edgeRules = jsonStrings.get(0);
+    String props = jsonStrings.get(1);
+
+    HashMap<String, ArrayList<LinkedHashMap<String, String>>> rules = new ObjectMapper().readValue(edgeRules, HashMap.class);
+    HashMap<String, String> properties = new ObjectMapper().readValue(props, HashMap.class);
+    Map<String, Class<?>> edgeProps = properties.entrySet().stream().collect(Collectors.toMap(p -> p.getKey(), p -> {
+      try {
+        return resolveClass(p.getValue());
+      } catch (CrudException | ClassNotFoundException e) {
+        e.printStackTrace();
+      }
+      return null;
+    }));
+
+    rules.get(SCHEMA_RULES_ARRAY).forEach(l -> {
+      relationTypes.put(l.get(SCHEMA_RELATIONSHIP_TYPE), edgeProps);
+      relations.put(buildRelation(l.get(SCHEMA_SOURCE_NODE_TYPE), l.get(SCHEMA_TARGET_NODE_TYPE), l.get(SCHEMA_RELATIONSHIP_TYPE)), edgeProps);
+    });
+  }
+
+
+
+  public Map<String, Class<?>> lookupRelation(String key) {
+    return this.relations.get(key);
+  }
+
+  public Map<String, Class<?>> lookupRelationType(String type) {
+    return this.relationTypes.get(type);
+  }
+
+  public boolean isValidType(String type) {
+    return relationTypes.containsKey(type);
+  }
+
+
+  private String buildRelation(String source, String target, String relation){
+    return source + ":" + target + ":" + relation;
+  }
+
+  private Class<?> resolveClass(String type) throws CrudException, ClassNotFoundException {
+    Class<?> clazz = Class.forName(type);
+    validateClassTypes(clazz);
+    return clazz;
+  }
+
+  private void validateClassTypes(Class<?> clazz) throws CrudException {
+    if (!clazz.isAssignableFrom(Integer.class) && !clazz.isAssignableFrom(Double.class)
+            && !clazz.isAssignableFrom(Boolean.class) && !clazz.isAssignableFrom(String.class)) {
+      throw new CrudException("", Status.BAD_REQUEST);
+    }
+  }
+}
+
+