040000 tree d405221b632469e16dd98601a7c4a3a10579d73d	aggregation
040000 tree c3cb19aebc8a54fc4081be255903f6765b84d00f	filter
040000 tree caec86f6b467ecc661a8207e3f655d84e0336fbb	join
040000 tree 20524af7fe3ac040ae81d9939078023570efa0d4	projection
040000 tree 7cca7a90bf805508f5daf3e08ca01015b651ac40	sp
040000 tree c9c9b28a8e7471488d2b185edde41499cee43c1e	temporal