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spv-file-format: Better document MANIFEST.MF.
author
Ben Pfaff
<blp@cs.stanford.edu>
Mon, 28 Dec 2020 19:39:12 +0000
(11:39 -0800)
committer
Ben Pfaff
<blp@cs.stanford.edu>
Mon, 28 Dec 2020 19:40:22 +0000
(11:40 -0800)
doc/dev/spv-file-format.texi
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diff --git
a/doc/dev/spv-file-format.texi
b/doc/dev/spv-file-format.texi
index f3548382ef12bf0aabbb95639d44c19d5d5aa5bc..ca0cb7d94c639302b4d307231ed1cc6bf0dbb93b 100644
(file)
--- a/
doc/dev/spv-file-format.texi
+++ b/
doc/dev/spv-file-format.texi
@@
-31,7
+31,10
@@
manifest contains the string @samp{allowPivoting=true}, without a
new-line. PSPP uses this string to identify an SPV file; it is
invariant across the corpus.@footnote{SPV files always begin with the
7-byte sequence 50 4b 03 04 14 00 08, but this is not a useful magic
new-line. PSPP uses this string to identify an SPV file; it is
invariant across the corpus.@footnote{SPV files always begin with the
7-byte sequence 50 4b 03 04 14 00 08, but this is not a useful magic
-number because most Zip archives start the same way.}
+number because most Zip archives start the same way.}@footnote{SPSS
+writes @file{META-INF/MANIFEST.MF} to every SPV file, but it does not
+read it or even require it to exist, so using different contents,
+e.g.@: as @samp{allowingPivot=false} has no effect.}
The rest of the members in an SPV file's Zip archive fall into two
categories: @dfn{structure} and @dfn{detail} members. Structure
The rest of the members in an SPV file's Zip archive fall into two
categories: @dfn{structure} and @dfn{detail} members. Structure