Metadata are written as a python dictionary. They have to meet following requirements:

Supported metadata

Example

metadata = {
	"category": "example",
  "table": "table_name"
	"features": {
			"feature1": {
			    "description": "Feature 1",
		 	    "tags": ["tag1", "tag2"],
			    "fillna_with": 0
			},
			"feature2": {
			    "description": "Feature 2",
			    "tags": ["tag1", "tag2"]
			},
	}
}