anchor.diff:  Specifies the configuration for the Portable Data eXchange (PDX) method of serialization.
   
   **API:** `org.apache.geode.cache.CacheFactory.setPdxReadSerialized`, `setPdxDiskStore`, `setPdxPersistent`, `setPdxIgnoreUnreadFields` and `org.apache.geode.cache.ClientCacheFactory.setPdxReadSerialized`, `setPdxDiskStore`, `setPdxPersistent`, `setPdxIgnoreUnreadFields`
  -
  -<a id="cc-pdx__d93e2117"></a>
   
   | Attribute            | Description                                                                                                                                                                                                | Default |
   |----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
  
positive.code: </tr>
  </tbody>
  </table>
  
  : <span class="tablecap">Table 9. Attributes</span>
  
  **Example:**
  
  
negative.code: </tbody>
  </table>
  
  ## <a id="cc-index" class="no-quick-link"></a>&lt;index&gt;
  
  Describes an index to be created on a region. The index node, if any, should all come immediately after the "region-attributes" node. The "name" attribute is a required field which identifies the name of the index. See [Working with Indexes](../../developing/query_index/query_index.html) for more information on indexes.
  
  **Default:**
  
  **API:** `org.apache.geode.cache.query.QueryService.createIndex, createKeyIndex, createHashIndex`
  
  **&lt;index&gt; Attributes**
  
  | Attribute   | Description | Default |
  |-------------|-------------|---------|
  | name        | Required. Name of the index. |         |
  | from-clause | Specifies the collection(s) of objects that the index ranges over. The from-clause must only contain one and only one region path. |         |
  | expression  | Specifies the lookup value of the index. |         |
  | imports     | String containing the imports used to create the index. String should be specified in the query language syntax with each import statement separated by a semicolon. The imports statement provides packages and classes used in variable typing in the indexed and FROM expressions. |         |
  | key-index   | True or false. Whether the index should be a key index. If true, the region key specified in the indexed expression is used to evaluate queries |         |
  | type        | Possible values are "hash" or "range". | range   |
  
  **Example:**
  
  