Triple S (.SSS) is an open-source standard developed for survey data. The format typically consists of two files:
One file that contains all the metadata. This file is an XML file, with the extension of .SSS. See
http://www.triple-s.org/ for more detail about the file format.
- A second file that contains the raw data, which is either a fixed format or CSV file.
Additional files are included if the data contains multiple hierarchically-related files (e.g., one file containing variables describing characteristics of households, and a second data file containing variables describing characteristics of people)
The main benefit of the Triple-S format over the SPSS Data File is that it contains more metadata about different types of questions, and usually has a clearer distinction between when questions were not asked versus when they were not seen.