Opentelemetry-proto

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v1.0.0...v1.1.0).

Added

* Add `flags` field to `Span` and `Span/Link` for W3C-specified Trace Context flags.
[503](https://github.com/open-telemetry/opentelemetry-proto/pull/503)
* Indicate if a `Span`'s parent or link is remote using 2 bit flag.
[484](https://github.com/open-telemetry/opentelemetry-proto/pull/484)

Changed

* Update and fix OTLP JSON examples. [516](https://github.com/open-telemetry/opentelemetry-proto/pull/516),
[510](https://github.com/open-telemetry/opentelemetry-proto/pull/510),
[499](https://github.com/open-telemetry/opentelemetry-proto/pull/499)
* Remove irrelevant comments from metric name field. [512](https://github.com/open-telemetry/opentelemetry-proto/pull/512)
* Add comment to explain schema_url fields. [504](https://github.com/open-telemetry/opentelemetry-proto/pull/504)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.20.0...v1.0.0).

Maturity

* Add note about the possibility to have unstable components after 1.0.0
[489](https://github.com/open-telemetry/opentelemetry-proto/pull/489)
* Add maturity JSON entry per package
[490](https://github.com/open-telemetry/opentelemetry-proto/pull/490)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.19.0...v0.20.0).

Maturity

* Declare OTLP/JSON Stable.
[436](https://github.com/open-telemetry/opentelemetry-proto/pull/436)
[435](https://github.com/open-telemetry/opentelemetry-proto/pull/435)
* Provide stronger symbolic stability guarantees.
[432](https://github.com/open-telemetry/opentelemetry-proto/pull/432)
* Clarify how additive changes are handled.
[455](https://github.com/open-telemetry/opentelemetry-proto/pull/455)

Changed

* Change the exponential histogram boundary condition.
[409](https://github.com/open-telemetry/opentelemetry-proto/pull/409)
* Clarify behavior for empty/not present/invalid trace_id and span_id fields.
[442](https://github.com/open-telemetry/opentelemetry-proto/pull/442)
* Change the collector trace endpoint to /v1/traces.
[449](https://github.com/open-telemetry/opentelemetry-proto/pull/449)

Added

* Introduce `zero_threshold` field to `ExponentialHistogramDataPoint`.
[441](https://github.com/open-telemetry/opentelemetry-proto/pull/441)
[453](https://github.com/open-telemetry/opentelemetry-proto/pull/453)

Removed

* Delete requirement to generate new trace/span id if an invalid id is received.
[444](https://github.com/open-telemetry/opentelemetry-proto/pull/444)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.18.0...v0.19.0).

Changed

* Add `csharp_namespace` option to protos.
([399](https://github.com/open-telemetry/opentelemetry-proto/pull/399))
* Fix some out-of-date urls which link to [specification](https://github.com/open-telemetry/opentelemetry-specification). ([#402](https://github.com/open-telemetry/opentelemetry-proto/pull/402))
* :stop_sign: [BREAKING] Delete deprecated InstrumentationLibrary,
InstrumentationLibraryLogs, InstrumentationLibrarySpans and
InstrumentationLibraryMetrics messages. Delete deprecated
instrumentation_library_logs, instrumentation_library_spans and
instrumentation_library_metrics fields.

Added

* Introduce Scope Attributes. [395](https://github.com/open-telemetry/opentelemetry-proto/pull/395)
* Introduce partial success fields in `Export<signal>ServiceResponse`.
[414](https://github.com/open-telemetry/opentelemetry-proto/pull/414)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.17.0...v0.18.0).

Changed

* Declare logs Stable.
[(376)](https://github.com/open-telemetry/opentelemetry-proto/pull/376)
* Metrics ExponentialHistogramDataPoint makes the `sum` optional
(follows the same change in HistogramDataPOint in 0.15). [392](https://github.com/open-telemetry/opentelemetry-proto/pull/392)

Full list of differences found in [this compare](https://github.com/open-telemetry/opentelemetry-proto/compare/v0.16.0...v0.17.0).

Changed

* Introduce optional `min` and `max` fields to the Histogram and ExponentialHistogram data points.
[(279)](https://github.com/open-telemetry/opentelemetry-proto/pull/279)