The Ministry of International Trade & Industry is studying the use of artificial intelligence techniques in the database for the Sigma project to create a comprehensive software development framework, particularly for program retrieval and maintenance; the Sigma database machine has now been installed in the project centre in Harumi, and the process of data accumulation is underway in the second stage of the project, which is due to continue until March 1990; the connection of external data sources such as the database maintained by the Japan Information Centre for Science and Technology is also likely.