From 088921a203a1d32f22dfb66958a282a62857a68e Mon Sep 17 00:00:00 2001
From: Ruben Vargas Palma <ruben.vp8510@gmail.com>
Date: Tue, 19 May 2020 14:13:21 -0500
Subject: [PATCH] =?UTF-8?q?docs:=20document=20CorrelationContext=20propaga?=
 =?UTF-8?q?tor=20under=20Built-in=20Implement=E2=80=A6=20(#1080)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/opentelemetry-core/README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/opentelemetry-core/README.md b/packages/opentelemetry-core/README.md
index 491c1041f8..8aa5f23148 100644
--- a/packages/opentelemetry-core/README.md
+++ b/packages/opentelemetry-core/README.md
@@ -13,6 +13,7 @@ This package provides default implementations of the OpenTelemetry API for trace
   * [HttpTraceContext Propagator](#httptracecontext-propagator)
   * [B3 Propagator](#b3-propagator)
   * [Composite Propagator](#composite-propagator)
+  * [Correlation Context Propagator](#correlation-context-propagator)
 - [Built-in Sampler](#built-in-sampler)
   * [Always Sampler](#always-sampler)
   * [Never Sampler](#never-sampler)
@@ -55,6 +56,17 @@ const { CompositePropagator } = require("@opentelemetry/core");
 api.propagation.setGlobalPropagator(new CompositePropagator());
 ```
 
+#### Correlation Context Propagator
+Provides a text-based approach to propagate [correlation context](https://w3c.github.io/correlation-context/) to remote services using the [OpenTelemetry CorrelationContext Propagation](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/correlationcontext/api.md#header-name) HTTP headers.
+
+```js
+const api = require("@opentelemetry/api");
+const { HttpCorrelationContext } = require("@opentelemetry/core");
+
+/* Set Global Propagator */
+api.propagation.setGlobalPropagator(new HttpCorrelationContext());
+```
+
 ### Built-in Sampler
 Sampler is used to make decisions on `Span` sampling.