httpsClient : keyFile
                                                    Path and filename of a private key.
| 
                                                                     Value  | 
                                                                
                                                                     String. The filename of a private key file in Privacy Enhanced Mail (PEM) format. The filepath is relative to TEXTPROC_HOME/config. You can also specify an absolute path. For the recommended path, see Copying certificates and keys.  | 
                                                            
| 
                                                                     Default  | 
                                                                
                                                                     './keys/server.key'  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     Set on the Nuance Text Processing Engine service in Management Station. If not using Management Station, set in the NTpE service configuration file (User-ntpexx.yaml, see Configuration roadmap).  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Typically changed once, when setting up secure connections during the transition from development to production environments. See Securing connections with SSL/TLS.  | 
                                                            
The httpClient properties control how the service behaves when acting as a client.