| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go.opentelemetry.io/otel/attribute | Package attribute provides key and value attributes. |
| go.opentelemetry.io/otel/internal/global | |
| go.opentelemetry.io/otel/sdk/instrumentation | Package instrumentation provides types to represent the code libraries that provide OpenTelemetry instrumentation. |
| go.opentelemetry.io/otel/sdk/metric/aggregation | |
| regexp | Package regexp implements regular expression search. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |