| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| go.opencensus.io/stats | Package stats contains support for OpenCensus stats recording. |
| go.opencensus.io/stats/view | Package view contains support for collecting and exposing aggregates over stats. |
| go.opencensus.io/tag | Package tag contains OpenCensus tags. |
| go.opencensus.io/trace | Package trace contains support for OpenCensus distributed tracing. |
| log | Package log implements a simple logging package. |