--- a/src/pyams_form/interfaces/templates/form.pt	Mon Jul 02 08:49:41 2018 +0200
+++ b/src/pyams_form/interfaces/templates/form.pt	Mon Jul 09 13:40:22 2018 +0200
@@ -10,7 +10,7 @@
 				<i class="fa fa-fw fa-times-circle"></i>
 			</button>
 			<h3 class="modal-title"
-				tal:define="config extension:configuration;">
+				tal:define="config tales:configuration;">
 				<span class="title" tal:content="view.title | context.title | config.title">Title</span>
 			</h3>
 			<tal:var replace="structure provider:form_toolbar" />
@@ -34,7 +34,7 @@
 							  accept view.accept;
 							  autocomplete view.autocomplete;
 							  class view.css_class;
-							  data-ams-data extension:object_data(view);
+							  data-ams-data tales:object_data(view);
 							  data-ams-form-handler view.get_ajax_handler() | nothing;
 							  data-ams-form-options view.get_form_options() | nothing;
 							  data-ams-form-submit-target view.form_target | nothing;
@@ -70,7 +70,7 @@
 														data-ams-checker-mode 'disable' if group.checkbox_mode == 'disable' else None;
 														data-ams-checker-marker '{0}-empty-marker'.format(group.checkbox_widget.name);
 														data-ams-checker-state group.checker_state;
-														data-ams-data extension:object_data(group);">
+														data-ams-data tales:object_data(group);">
 									<label tal:content="legend">Legend</label>
 								</legend>
 							</tal:if>
@@ -83,7 +83,7 @@
 							<tal:var define="help group.help" condition="help">
 								<div class="alert alert-info padding-5"
 									 tal:define="i18n_help request.localizer.translate(help);"
-									 tal:content="structure extension:html(i18n_help)"></div>
+									 tal:content="structure tales:html(i18n_help)"></div>
 							</tal:var>
 							<tal:loop repeat="widget group.visible_widgets">
 								<input type="hidden"
@@ -105,7 +105,7 @@
 										<div tal:attributes="class widget.input_css_class | group.input_css_class | view.input_css_class">
 											<label class="input"
 												   tal:attributes="class widget.widget_css_class | default;
-																   data-ams-data extension:object_data(widget);
+																   data-ams-data tales:object_data(widget);
 																   data-ams-form-validator view.get_widget_callback(widget.field.getName())">
 												<div tal:define="notice widget.before_widget_notice | nothing"
 													 tal:condition="notice"