X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=doc%2Fdev%2Fsystem-file-format.texi;h=b1be385334bf5ef3f8aa1adfcfdecb10d9adaf3d;hb=e624e2da6ea68d22e6d4fba4eaa96d37d07a6730;hp=70fa385c7525efea051a5bfb90fbf046bdb7e14b;hpb=59990cb7ac648d05a8fe981def5433e5496d0efa;p=pspp-builds.git

diff --git a/doc/dev/system-file-format.texi b/doc/dev/system-file-format.texi
index 70fa385c..b1be3853 100644
--- a/doc/dev/system-file-format.texi
+++ b/doc/dev/system-file-format.texi
@@ -884,6 +884,9 @@ value @var{code} - @var{bias}, where
 variable @code{bias} from the file header.  For example,
 code 105 with bias 100.0 (the normal value) indicates a numeric variable
 of value 5.
+One file has been seen written by SPSS 14 that contained such a code
+in a @emph{string} field with the value 0 (after the bias is
+subtracted) as a way of encoding null bytes.
 
 @item 252
 End of file.  This code may or may not appear at the end of the data