sys-file-reader: Add tests.

[pspp-builds.git] / doc / dev / system-file-format.texi

diff --git a/doc/dev/system-file-format.texi b/doc/dev/system-file-format.texi
index 972b1331b4fb0f0be54ff7b2118f8bb204a71293..1c3e4349c79380edf70b7d1ced83cafecf6f148e 100644 (file)
--- a/doc/dev/system-file-format.texi
+++ b/doc/dev/system-file-format.texi
@@ -774,8 +774,8 @@ Ordinal Scale
 Continuous Scale
 @end table
 
-SPSS 14 sometimes writes a @code{measure} of 0.  PSPP interprets this
-as nominal scale.
+SPSS 14 sometimes writes a @code{measure} of 0 for string variables.
+PSPP interprets this as nominal scale.
 
 @item int32 width;
 The width of the display column for the variable in characters.