diff --git a/html/labels.html b/html/labels.html
index 83846264445a8d115ba477951977c52a76e15fc4..67d411af4e497d5cae3e92ecc1612baae7318ecb 100644
--- a/html/labels.html
+++ b/html/labels.html
@@ -49,6 +49,8 @@
 <dl>
 <dt>http://knowledgeweb.semanticweb.org/heterogeneity/alignment#id</dd>
 <dd>URI identifying the alignment.</dd>
+<dt>http://exmo.inrialpes.fr/align/ext/1.0/#version</dd>
+<dd>STRING identifying the version of the alignment.</dd>
 <dt>http://exmo.inrialpes.fr/align/ext/1.0/#method</dd>
 <dd>CLASSNAME of the generating matching method (or operation).</dd>
 <dt>http://exmo.inrialpes.fr/align/ext/1.0/#methodVersion</dd>