lexicon-search-order
                                                    Specifies the list of active lexicon URIs and their search order.
| 
                                                                     Value  | 
                                                                
                                                                     String of absolute URIs, separated by spaces, in search order. DEFAULT: (none)  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     In the browser, using the Lexicon-Search-Order header in a SPEAK, GET-PARAMS, or SET-PARAMS method. For the synthesizer—In the application’s session.xml in the <speechsynth> section of <speechserver> under <sessionparameters>.  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Rarely used.  |