Important
JDemetra+ v3 is under active development and improvement, while v2 is in maintenance mode. The v3 has all the features of v2, and it can use v2 workspaces. However, note that the opposite is not true: once a v2 workspace is modified by v3, v2 cannot read it anymore. JDemetra+ v2 will reach its end of life in December 2026, which coincides with the end of Java 8's official support.
The JDemetra+ core libraries contain all the algorithmic part of the software and numerous peripheral services around time series (access to data providers, formatting...). JDemetra-core doesn't provide any graphical component.
A large part of the core of JDemetra+ is based on the programs TRAMO-SEATS(+) and X12-ARIMA.
The program TRAMO-SEATS+ is developed by Gianluca Caporello and Agustin Maravall -with programming support from Domingo Perez and Roberto Lopez- at the Bank of Spain. It is based on the program TRAMO-SEATS, previously developed by Victor Gomez and Agustin Maravall. The original software can be downloaded from the following address: http://www.bde.es
The program X12-ARIMA was produced by the US-Census Bureau. It can be downloaded from the following address: https://www.census.gov/data/software/x13as.html