We goal to simplify the suggests of data sharing and to visualize the data which can be meaningless to normal people. Retrieves a historic Edition of a selected data dictionary (provided in its dataset url) depending on the presented day. Retrieves a historical Variation of a certain schema (given in https://datahongkong91225.bloguerosa.com/36231828/how-much-you-need-to-expect-you-ll-pay-for-a-good-data-hk-lengkap