1 2#------------------------------------------------------------------------------ 3# $File: statistics,v 1.3 2022/03/24 15:48:58 christos Exp $ 4# statistics: file(1) magic for statistics related software 5# 6 7# From Remy Rampin 8 9# Stata is a statistical software tool that was created in 1985. While I 10# don't personally use it, data files in its native (proprietary) format 11# are common (.dta files). 12# 13# Because they are so common, especially in statistical and social 14# sciences, Stata files and SPSS files can be opened by a lot of modern 15# software, for example Python's pandas package provides built-in 16# support for them (read_stata() and read_spss()). 17# 18# I noticed that the magic database includes an entry for SPSS files but 19# not Stata files. Stata files for Stata 13 and newer (formats 117, 118, 20# and 119) always begin with the string "<stata_dta><header>" as per 21# https://www.stata.com/help.cgi?dta#definition 22# 23# The format version number always follows, for example: 24# <stata_dta><header><release>117</release> 25# <stata_dta><header><release>118</release> 26# 27# Therefore the following line would do the trick: 28# 0 string <stata_dta><header> Stata Data File 29# 30# (I'm sure the version number could be captured as well but I did not 31# manage this without a regex) 32# 33# Unfortunately the previous formats (created by Stata before 13, which 34# was released 2013) are harder to recognize. Format 115 starts with the 35# four bytes 0x73010100 or 0x73020100, format 114 with 0x72010100 or 36# 0x72020100, format 113 with 0x71010101 or 0x71020101. 37# 38# For additional reference, the Library of Congress website has an entry 39# for the Stata Data File Format 118: 40# https://www.loc.gov/preservation/digital/formats/fdd/fdd000471.shtml 41# 42# Example of those files can be found on Zenodo: 43# https://zenodo.org/search?page=1&size=20&q=&file_type=dta 440 string \<stata_dta\>\<header\>\<release\> Stata Data File 45>&0 regex [0-9]+ (Release %s) 46