X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=doc%2Fdev%2Fsystem-file-format.texi;h=a480195857f8d027cc910d9c9ac76b6d6ff26fb7;hb=008fe5fdec4f94535df888ff8cdd94f802a3660d;hp=0da1997b3f7f8b611040d62aa9d17dfefd752c76;hpb=e12c4fd7aa872268da1380e02a6d82e4222e8b26;p=pspp

diff --git a/doc/dev/system-file-format.texi b/doc/dev/system-file-format.texi
index 0da1997b3f..a480195857 100644
--- a/doc/dev/system-file-format.texi
+++ b/doc/dev/system-file-format.texi
@@ -316,6 +316,13 @@ the at-sign (@samp{@@}).  Subsequent characters may also be digits, octothorpes
 (@samp{#}), dollar signs (@samp{$}), underscores (@samp{_}), or full
 stops (@samp{.}).  The variable name is padded on the right with spaces.
 
+The @samp{name} fields should be unique within a system file.  System
+files written by SPSS that contain very long string variables with
+similar names sometimes contain duplicate names that are later
+eliminated by resolving the very long string names (@pxref{Very Long
+String Record}).  PSPP handles duplicates by assigning them new,
+unique names.
+
 @item int32 label_len;
 This field is present only if @code{has_var_label} is set to 1.  It is
 set to the length, in characters, of the variable label.  The