Glossary of expectations¶
Dataset objects model tabular data and include expectations with row and column semantics. Many Dataset expectations are implemented using column_map_expectation and column_aggregate_expectation decorators.
Not all expectations are currently available for each backend. A table describing available implementations per-backend is available here: Table of Expectation Implementations By Backend.
Missing values, unique values, and types¶
Sets and ranges¶
Datetime and JSON parsing¶
File data assets reason at the file level, and the line level (for text data).