From 8c0319895ca7f739e7f7125bc7c2dcce81a411b6 Mon Sep 17 00:00:00 2001
From: Dave Longley <dlongley@digitalbazaar.com>
Date: Mon, 15 Jul 2013 14:10:29 -0400
Subject: [PATCH] Do not include '@' for empty language tag.

---
 jsonld.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/jsonld.php b/jsonld.php
index 369ccca..3afabb6 100644
--- a/jsonld.php
+++ b/jsonld.php
@@ -1638,7 +1638,9 @@ class JsonLdProcessor {
         $o->value);
       $quad .= '"' . $escaped . '"';
       if($o->datatype === self::RDF_LANGSTRING) {
-        $quad .= "@{$o->language}";
+        if($o->language) {
+          $quad .= "@{$o->language}";
+        }
       }
       else if($o->datatype !== self::XSD_STRING) {
         $quad .= "^^<{$o->datatype}>";