Incorrect schema
The schema of https://gitlab.com/datadrivendiscovery/metalearning/blob/master/example.yml#L2 should be "https://metadata.datadrivendiscovery.org/schemas/v0/pipeline.json"
The schema of https://gitlab.com/datadrivendiscovery/metalearning/blob/master/example.yml#L2 should be "https://metadata.datadrivendiscovery.org/schemas/v0/pipeline.json"