1e41f4b71Sopenharmony_ci# DFX Subsystem Changelog 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci## cl.hiviewdfx.1 Event Verification Specification Change for the write Method of the HiAppEvent Module 4e41f4b71Sopenharmony_ci 5e41f4b71Sopenharmony_ciExtended the event verification specifications for the **write** method of the HiAppEvent module to support predefined events of HUAWEI Analytics. Specific changes are as follows: 6e41f4b71Sopenharmony_ci 7e41f4b71Sopenharmony_ci - The event name can start with a dollar sign ($) and can contain uppercase letters, lowercase letters, digits, and underscores (_). Before the change, the event name can contain lowercase letters, digits, and underscores (_). 8e41f4b71Sopenharmony_ci - The event parameter name can start with a dollar sign ($) and can contain uppercase letters, lowercase letters, digits, and underscores (_). Before the change, the event parameter name can contain lowercase letters, digits, and underscores (_). 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci**Change Impact** 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ciMore event definition formats are supported for event logging. 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci**Key API/Component Changes** 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ciInvolved APIs: 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci - hiAppEvent.write; 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci**Adaptation Guide** 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ciThe event verification specifications are downward compatible. No additional adaptation is required. 23