Indicators have been prepared by national statistical agencies primarily to meet the requirements of users within their own country. In most instances, the indicators are compiled in accordance with international statistical guidelines and recommendations. However, national practices may depart from these guidelines, and these departures may impact on comparability between countries; in such cases the deviations from practices are described in metadata for the relevant county and subject coordinates. There is an on-going process to review and improve the contents of the database in order to maximise the relevance of the database for short-term economic analysis, for example, through the inclusion of new indicators reflecting new areas of analysis and policy making. In June 2010, the way of calculating CPI target series has been reviewed. As a result, some CPI series have been revised. For further information, please see:
Changes to the OECD Consumer Price Indices (CPI) series