def populate_payload(self, _container=None):
"""
Translates the contents of this object into a payload for sending across to the storage entity.
:return: the populated form
"""
if _container:
container = _container
else:
container = Form()
if self.about:
container.add_field(var=str(RDF.about), value=str(self.about), ftype='text-single')
if len(self._types):
container.add_field(var=str(RDF.type), value=self._types, ftype='list-multi')
for key, value in self._properties.iteritems():
property_field = container.add_field(var=str(key), value=value, ftype='list-multi')
type_stanza = FormValidation()
type_stanza['datatype'] = 'xs:string'
property_field.append(type_stanza)
for key, value in self._references.iteritems():
reference_field = container.add_field(var=str(key), value=value, ftype='list-multi')
type_stanza = FormValidation()
type_stanza['datatype'] = 'xs:anyURI'
reference_field.append(type_stanza)
for key, value in self._flags.iteritems():
container.add_field(var=key.var, value=value, ftype=key.field_type)
return container
