Notice to Users

• The Consumer Price Index (CPI) Microdata is now divided into three components:

1. cpi_extended_dataset_199802_to_200905:  A historical dataset with limited metadata
2. cpi_microdata_200906_to_201412: A second historical dataset with additional geographic and product labels. The additional metadata can found in prov_city_list_200906_to_201412 and rp_list_2009_to_201412. 
3. cpi_microdata_201501_to_202508: A new microdata set, revising earlier periods back to 201501.  This dataset uses modernized product codes for item_id and refines the mapping of basket weights for basic aggregate product classes.  Basket weights at the Canada level are provided in the cda_basic_weight_link_201501_to_202508 file for published classes.  Data in this format will continue to be provided into the future.

• Column names in both of the historical datasets has been updated to match those in the modern dataset, except for “ITEM” which has be renamed “old_item_id”. 
• To support users transitioning items between the historical datasets and the modern series, an rp_id_concordance key file is provided showing the relationship between old_item_id and item_id.