def tag(self, task):
update = Ontology(self.env, 'ns.medium.resource.meta.tag')
meta = self.meta.project('ns.medium.resource.meta.tag')
knowledge = Ontology(self.env, 'ns.medium.resource.meta.tag', self.knowledge['body'])
genealogy = Ontology(self.env, 'ns.service.genealogy', self.knowledge['head']['genealogy'])
knowledge.merge_all(genealogy)
# Everything that is in meta but doesn't fit knowledge
# should be replaced with the value in knowledge
for i in meta.keys():
if meta[i] != knowledge[i]:
update[i] = knowledge[i]
# Everything that is in knowledge but not in meta
# should be set to the value in knowledge
for i in knowledge.keys():
if i not in meta:
update[i] = knowledge[i]
modify = []
for k,v in update.iteritems():
prototype = update.namespace.find(k)
if prototype and prototype.node['subler']:
modify.append(u'{{{}:{}}}'.format(prototype.node['subler'],v))
print unicode(modify).encode('utf-8')
