'Populates a dictionary with the name/value pairs necessary
to identify this Tag in a request.'

def build_params(self, params, i):

    prefix = ('Tags.member.%d.' % i)
    params[(prefix + 'ResourceId')] = self.resource_id
    params[(prefix + 'ResourceType')] = self.resource_type
    params[(prefix + 'Key')] = self.key
    params[(prefix + 'Value')] = self.value
    if self.propagate_at_launch:
        params[(prefix + 'PropagateAtLaunch')] = 'true'
    else:
        params[(prefix + 'PropagateAtLaunch')] = 'false'
