From d0b9f2ca67f03cde63bb5e28294ff688d8e02208 Mon Sep 17 00:00:00 2001
From: "David I. Lehn" <dlehn@digitalbazaar.com>
Date: Tue, 10 Mar 2020 17:51:33 -0400
Subject: [PATCH] Fix for Merge Node Maps algorithm.

- Exclude `@type` from added values in Merge Node Maps step 2.2.1.
- Fix for https://github.com/w3c/json-ld-api/issues/407.
---
 CHANGELOG.md   | 3 +++
 lib/nodeMap.js | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d47eabe4..cd42cfa5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # jsonld ChangeLog
 
+### Fixed
+- Exclude `@type` from added values in Merge Node Maps step 2.2.1.
+
 ## 3.0.0 - 2020-03-10
 
 ### Notes
diff --git a/lib/nodeMap.js b/lib/nodeMap.js
index 9fe58e50..9e61d5e0 100644
--- a/lib/nodeMap.js
+++ b/lib/nodeMap.js
@@ -241,7 +241,7 @@ api.mergeNodeMapGraphs = graphs => {
       const mergedNode = merged[id];
 
       for(const property of Object.keys(node).sort()) {
-        if(isKeyword(property)) {
+        if(isKeyword(property) && property !== '@type') {
           // copy keywords
           mergedNode[property] = util.clone(node[property]);
         } else {