def render_meta(canteen, menu_feed_url):
"""Render a OpenMensa XML meta feed for a given canteen.
:param Canteen canteen: the canteen
:param menu_feed_url: the canteen menu URL
:return: the XML meta feed as string
"""
builder = LazyBuilder()
builder.name = canteen.name
builder.address = canteen.street
builder.city = canteen.city
builder.define(name='full',
priority='0',
url=menu_feed_url,
source=None,
dayOfWeek='*',
dayOfMonth='*',
hour='8-18',
minute='0',
retry='30 1')
return builder.toXMLFeed()
