Metadata editor idea. This is just a dirty sketch that shows how I want to make metaeditor work.

MoinMoin/templates/forms.html

 {#
 Helpers for using flatland with jinja2 to create html forms.
 
 @copyright: Thomas Waldmann, Jason Kirtland, Scott Wilson, Cheer Xiao
 @license: see flatland license
 #}
 
 {% macro render_errors(field) %}
   {% if field.errors %}
     <ul class="moin-error">
@@ skipping 32 matching lines @@
       'text': annotated_input,
       'url': annotated_input,
       'email': annotated_input,
       'password': annotated_input,
       'file': annotated_input,
       'checkbox': annotated_input,
       'multiline_text': multiline_text,
       'inline_checkbox': inline_checkbox,
       'any_integer': any_integer,
       'small_natural': small_natural,
+      'datetime': datetime,
       'search': search,
       'submit': raw_input,
       'hidden': raw_input,
       'select': select,
   }[field.properties.widget] or stub -%}
   {{ macro(field, *varargs, **kwargs) }}
 {% endmacro %}
 
 {% macro stub(field) %}
   <fieldset>
@@ skipping 61 matching lines @@
 {% macro small_natural(field) %}
     {{ gen.label(field) }}
     <dd>
         {% for i in range(field.properties.lower, field.properties.upper+1) %}
             {{ gen.input(field, type='radio', value=i|string) }}
             {{ _radio_label(field, value=i|string) }}
         {% endfor %}
     </dd>
 {% endmacro %}
 
+{% macro datetime(field) %}
+  {{ annotated_input(field, 'text') }}
+{% endmacro %}
+
 {% macro search(field) %}
   {{ raw_input(field, id='moin-search-query') }}
 {% endmacro %}
 
 {% macro select(field) %}
   <dt>
     {{ gen.label(field) }}
   </dt>
   <dd>
     {{ gen.select.open(field) }}
@@ skipping 26 matching lines @@
                 <td class="file_upload_cancel"><button>{{ _("Cancel") }}</button></td>
                 <td class="file_name"></td>
                 <td class="file_upload_progress"><div></div></td>
             </tr>
         </table>
     </div>
     <link rel="stylesheet" href="{{ url_for('serve.files', name='jquery_file_upload', filename='jquery.fileupload-ui.css') }}">
     <script src="{{ url_for('serve.files', name='jquery_file_upload', filename='jquery.fileupload.js') }}"></script>
     <script src="{{ url_for('serve.files', name='jquery_file_upload', filename='jquery.fileupload-ui.js') }}"></script>
 {% endmacro %}