Specify dimension list at beginning of data.

[pspp] / spv-file-format.texi

diff --git a/spv-file-format.texi b/spv-file-format.texi
index c58723379517a7ddfd275184a96020313f147703..bb615a2384333bd3fd4166b21a38f04dceffeefd 100644 (file)
--- a/spv-file-format.texi
+++ b/spv-file-format.texi
@@ -554,3 +554,20 @@ are terminal categories that directly represent data values for a
 variable (e.g. in a frequency table or crosstabulation, a group of
 values in a variable being tabulated) and i0 otherwise, but this might
 be naive.
+
+@example
+data := int[layers] int[rows] int[columns] int*[n-dimensions]
+@end example
+
+The values of @code{layers}, @code{rows}, and @code{columns} each
+specifies the number of dimensions represented in layers or rows or
+columns, respectively, and their values sum to the number of
+dimensions.
+
+The @code{n-dimensions} integers are a permutation of the 0-based
+dimension numbers.  The first @code{layers} of them specify each of
+the dimensions represented by layers, the next @code{rows} of them
+specify the dimensions represented by rows, and the final
+@code{columns} of them specify the dimensions represented by columns.
+When there is more than one dimension of a given kind, the inner
+dimensions are given first.