From a93ed395912130c4a91cfad19861b3fb3fd5371e Mon Sep 17 00:00:00 2001
From: Baojing Zuo <zuobaojing@gmail.com>
Date: Fri, 21 Apr 2017 19:35:40 +0800
Subject: [PATCH] should not double encode blank node primaryKey

---
 lib/util/Util.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/util/Util.js b/lib/util/Util.js
index b270d24..285b71f 100644
--- a/lib/util/Util.js
+++ b/lib/util/Util.js
@@ -122,10 +122,10 @@ class Util {
 
         let primaryKey = item.primaryKey;
         delete item.primaryKey;
-        if (!primaryKey.startsWith('<')) {
+        if (!primaryKey.startsWith('<') && !primaryKey.startsWith('_:')) {
           primaryKey = '<' + primaryKey;
         }
-        if (!primaryKey.endsWith('>')) {
+        if (!primaryKey.endsWith('>') && !primaryKey.startsWith('_:')) {
           primaryKey += '>';
         }