Using:

    <span tal:condition="python:not InBatchUpdate"
          tal:content="structure
                       python:context.title.field(id='title',
                       required=None)">title</span>

does generate:

    <input name="title" required value="test" type="text" id="title" size="30">

This is now documented at https://rouilj.dynamic-
dns.net/~rouilj/roundup_docs/docs/reference.html#hyperdb-property-wrapper