--- a/src/pyams_default_theme/templates/layout.pt Thu Jul 05 12:32:47 2018 +0200
+++ b/src/pyams_default_theme/templates/layout.pt Thu Jul 05 15:10:47 2018 +0200
@@ -2,7 +2,7 @@
<html lang="en" i18n:domain="pyams_default_theme"
tal:define="config extension:configuration;"
tal:attributes="lang request.locale_name">
-<head>
+<head prefix="og: http://ogp.me/ns# article: http://ogp.me/ns/article#">
<tal:var replace="structure extension:metas" />
<tal:if define="icon config.icon | nothing; url extension:absolute_url(icon);" condition="icon">