1# DFX 2 3- [Development of Application Event Logging](hiappevent-guidelines.md) 4- [Development of Performance Tracing](hitracemeter-guidelines.md) 5- [Development of Distributed Call Chain Tracing](hitracechain-guidelines.md) 6- Error Management 7 - [Development of Error Manager](errormanager-guidelines.md) 8 - [Development of Application Recovery](apprecovery-guidelines.md) 9