* Null identifiers can now be in targets, as long as one column can be used to identify a record as belonging to a case.
0.4.0
* [breaking] Loading actuals now expect a "columns" field to be present. This helps with handling empty data.
0.3.0
* Name of this project is now "Data Transform Spec". * Rudamentary method to convert spec into a markdown document. * Can now use "values" to specify constants in target data expectations. * Improved user-facing error messaging.
0.2.0
* Identifiers can now be null. * When data is serialized/deserialized, "{NULL}" string is treated as null/None. * Improved user-facing error messaging.
0.1.1
* Adds a `compare_via` option for data expectations.