Index: sites/all/modules/contrib/xmlsitemap/xmlsitemap.generate.inc
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- sites/all/modules/contrib/xmlsitemap/xmlsitemap.generate.inc	(revision bb70f9270ccf04ba766e3513ab7b0015dec2e00e)
+++ sites/all/modules/contrib/xmlsitemap/xmlsitemap.generate.inc	(revision )
@@ -538,7 +538,7 @@
         }
       }
       $xhtml_links[] = array(
-        'rel' => 'alternative',
+        'rel' => 'alternate',
         'href' => url($link['original'], array('language' => $lang, 'absolute' => TRUE)),
         'hreflang' => $lang->language,
       );
@@ -547,7 +547,7 @@
     if ($x_default != 'none') {
       $x_default_lang = $x_default == "default" ? language_default()->language : $x_default;
       $xhtml_links[] = array(
-        'rel' => 'alternative',
+        'rel' => 'alternate',
         'href' => url($link['original'], array('language' => $x_default_lang, 'absolute' => TRUE)),
         'hreflang' => 'x-default',
       );