From 71131a5290c10c9edc03056ccbf9e6eb0e70e9b4 Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Sat, 16 Jan 2016 16:41:59 -0800 Subject: [PATCH] Add documentation for SPV file format. --- acinclude.m4 | 28 + configure.ac | 1 + doc/automake.mk | 15 + doc/dev/spv-file-format.texi | 1111 ++++++++++++++++++++++++++++++++++ doc/dev/spv-structure.eps | 626 +++++++++++++++++++ doc/dev/spv-structure.gv | 25 + doc/dev/spv-structure.pdf | Bin 0 -> 16814 bytes doc/pspp-dev.texi | 4 +- 8 files changed, 1809 insertions(+), 1 deletion(-) create mode 100644 doc/dev/spv-file-format.texi create mode 100644 doc/dev/spv-structure.eps create mode 100644 doc/dev/spv-structure.gv create mode 100644 doc/dev/spv-structure.pdf diff --git a/acinclude.m4 b/acinclude.m4 index 3e16c68879..2924047230 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -303,3 +303,31 @@ AC_DEFUN([PSPP_ENABLE_WERROR], CFLAGS="$CFLAGS -Werror -Wno-error=deprecated-declarations" fi])]) +# The following comes from Open vSwitch: +# ---------------------------------------------------------------------- +# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +dnl Checks for dot. +AC_DEFUN([PSPP_CHECK_DOT], + [AC_CACHE_CHECK( + [for dot], + [pspp_cv_dot], + [dnl "dot" writes -V output to stderr: + if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then + pspp_cv_dot=yes + else + pspp_cv_dot=no + fi]) + AM_CONDITIONAL([HAVE_DOT], [test "$pspp_cv_dot" = yes])]) diff --git a/configure.ac b/configure.ac index 5fa4ea3843..9ce7699833 100644 --- a/configure.ac +++ b/configure.ac @@ -19,6 +19,7 @@ AC_PROG_LIBTOOL PKG_PROG_PKG_CONFIG m4_pattern_forbid([PKG_CHECK_MODULES]) PSPP_CHECK_CLICKSEQUENCE +PSPP_CHECK_DOT PSPP_ENABLE_WERROR diff --git a/doc/automake.mk b/doc/automake.mk index b4d93ce1b3..28866ca2e9 100644 --- a/doc/automake.mk +++ b/doc/automake.mk @@ -41,9 +41,24 @@ doc_pspp_dev_TEXINFOS = doc/version-dev.texi \ doc/dev/system-file-format.texi \ doc/dev/pc+-file-format.texi \ doc/dev/portable-file-format.texi \ + doc/dev/spv-file-format.texi \ doc/dev/encrypted-file-wrappers.texi \ doc/dev/q2c.texi +if HAVE_DOT +$(PDFS): doc/dev/spv-structure.pdf +$(srcdir)/doc/dev/spv-structure.pdf: doc/dev/spv-structure.gv + dot -Tpdf < $< > $@ + +$(DVIS): doc/dev/spv-structure.eps +$(srcdir)/doc/dev/spv-structure.eps: doc/dev/spv-structure.gv + dot -Teps < $< > $@ +endif +EXTRA_DIST += \ + doc/dev/spv-structure.gv \ + doc/dev/spv-structure.pdf \ + doc/dev/spv-structure.eps + dist_man_MANS += doc/pspp.1 \ doc/psppire.1 diff --git a/doc/dev/spv-file-format.texi b/doc/dev/spv-file-format.texi new file mode 100644 index 0000000000..18c44635cc --- /dev/null +++ b/doc/dev/spv-file-format.texi @@ -0,0 +1,1111 @@ +@node SPSS Viewer File Format +@chapter SPSS Viewer File Format + +SPSS Viewer or @file{.spv} files, here called SPV files, are written +by SPSS 16 and later to represent the contents of its output editor. +This chapter documents the format, based on examination of a corpus of +about 500 files from a variety of sources. This description is +detailed enough to read SPV files, but probably not enough to write +them. + +SPSS 15 and earlier versions use a completely different output format +based on the Microsoft Compound Document Format. This format is not +documented here. + +An SPV file is a Zip archive that can be read with @command{zipinfo} +and @command{unzip} and similar programs. The final member in the Zip +archive is a file named @file{META-INF/MANIFEST.MF}. This structure +makes SPV files resemble Java ``JAR'' files (and ODF files), but +whereas a JAR manifest contains a sequence of colon-delimited +key/value pairs, an SPV manifest contains the string +@samp{allowPivoting=true}, without a new-line. (This string may be +the best way to identify an SPV file; it is invariant across the +corpus.) + +The rest of the members in an SPV file's Zip archive fall into two +categories: @dfn{structure} and @dfn{detail} members. Structure +member names begin with @file{outputViewer@var{nnnnnnnnnn}}, where +each @var{n} is a decimal digit, and end with @file{.xml}, and often +include the string @file{_heading} in between. Each of these members +represents some kind of output item (a table, a heading, a block of +text, etc.) or a group of them. The member whose output goes at the +beginning of the document is numbered 0, the next member in the output +is numbered 1, and so on. + +Structure members contain XML. This XML is sometimes self-contained, +but it often references detail members in the Zip archive, which named +as follows: + +@table @asis +@item @file{@var{prefix}_table.xml} and @file{@var{prefix}_tableData.bin} +@itemx @file{@var{prefix}_lightTableData.bin} +The structure of a table plus its data. Older SPV files pair a +@file{@var{prefix}_table.xml} file that describes the table's +structure with a binary @file{@var{prefix}_tableData.bin} file that +gives its data. Newer SPV files (the majority of those in the corpus) +instead include a single @file{@var{prefix}_lightTableData.bin} file +that incorporates both into a single binary format. + +@item @file{@var{prefix}_warning.xml} and @file{@var{prefix}_warningData.bin} +@itemx @file{@var{prefix}_lightWarningData.bin} +Same format used for tables, with a different name. + +@item @file{@var{prefix}_notes.xml} and @file{@var{prefix}_notesData.bin} +@itemx @file{@var{prefix}_lightNotesData.bin} +Same format used for tables, with a different name. + +@item @file{@var{prefix}_chartData.bin} and @file{@var{prefix}_chart.xml} +The structure of a chart plus its data. Charts do not have a +``light'' format. + +@item @file{@var{prefix}_model.scf} +@itemx @file{@var{prefix}_pmml.scf} +Not yet investigated. The corpus contains only one example of each. + +@item @file{@var{prefix}_stats.xml} +Not yet investigated. The corpus contains few examples. +@end table + +The @file{@var{prefix}} in the names of the detail members is +typically an 11-digit decimal number that increases for each item, +tending to skip values. Older SPV files use different naming +conventions. Structure member refer to detail members by name, and so +their exact names do not matter to readers as long as they are unique. + +@menu +* SPV Structure Member Format:: +* SPV Light Detail Member Format:: +* SPV Legacy Detail Member Binary Format:: +@end menu + +@node SPV Structure Member Format +@section Structure Member Format + +Structure members' XML files claim conformance with a collection of +XML Schemas. These schemas are distributed, under a nonfree license, +with SPSS binaries. Fortunately, the schemas are not necessary to +understand the structure members. To a degree, the schemas can even +be deceptive because they document elements and attributes that are +not in the corpus and do not document elements and attributes that are +commonly found there. + +Structure members use a different XML namespace for each schema, but +these namespaces are not entirely consistent. In some SPV files, for +example, the @code{viewer-tree} schema is associated with namespace +@indicateurl{http://xml.spss.com/spss/viewer-tree} and in others with +@indicateurl{http://xml.spss.com/spss/viewer/viewer-tree} (note the +additional @file{viewer/}). Under either name, the schema URIs are +not resolvable to obtain the schemas themselves. + +One may ignore all of the above in interpreting a structure member. +The actual XML has a simple and straightforward form that does not +require a reader to take schemas or namespaces into account. + +The elements found in structure members are documented below. For +each element, we note the possible parent elements and the element's +contents. The contents are specified as pseudo-regular expressions +with the following conventions: + +@table @asis +@item text +XML text content. + +@item CDATA +XML CDATA content. + +@item @code{element} +The named element. + +@item (@dots{}) +Grouping multiple elements. + +@item [@var{x}] +An optional @var{x}. + +@item @var{a} @math{|} @var{b} +A choice between @var{a} and @var{b}. + +@item @var{x}* +Zero or more @var{x}. +@end table + +@ifnottex +For a diagram illustrating the hierarchy of elements within an SPV +structure member, please refer to a PDF version of the manual. +@end ifnottex + +@iftex +The following diagram shows the hierarchy of elements within an SPV +structure member. Edges point from parent to child elements. +Unlabeled edges indicate that the child appears exactly once; edges +labeled with *, zero or more times; edges labeled with ?, zero or one +times. +@center @image{dev/spv-structure, 5in} +@end iftex + +@menu +* SPV heading Element:: +* SPV label Element:: +* SPV container Element:: +* SPV text Element (Inside @code{container}):: +* SPV html Element:: +* SPV table Element:: +* SPV tableStructure Element:: +* SPV dataPath Element:: +* SPV pageSetup Element:: +* SPV pageHeader and pageFooter Elements:: +* SPV pageParagraph Element:: +* SPV @code{text} Element (Inside @code{pageParagraph}):: +@end menu + +@node SPV heading Element +@subsection The @code{heading} Element + +Parent: Document root or @code{heading} @* +Contents: [@code{pageSetup}] @code{label} (@code{container} @math{|} @code{heading})* + +The root of a structure member is a @code{heading}, which represents a +section of output beginning with a title (the @code{label}) and +ordinarily followed by content containers or further nested +(sub)-sections of output. + +The document root heading, only, may also contain a @code{pageSetup} +element. + +The following attributes have been observed on both document root and +nested @code{heading} elements. + +@defvr {Optional} creator-version +The version of the software that created this SPV file. A string of +the form @code{xxyyzzww} represents software version xx.yy.zz.ww, +e.g.@: @code{21000001} is version 21.0.0.1. Trailing pairs of zeros +are sometimes omitted, so that @code{21}, @code{210000}, and +@code{21000000} are all version 21.0.0.0 (and the corpus contains all +three of those forms). +@end defvr + +@noindent +The following attributes have been observed on document root +@code{heading} elements only: + +@defvr {Optional} @code{creator} +The directory in the file system of the software that created this SPV +file. +@end defvr + +@defvr {Optional} @code{creation-date-time} +The date and time at which the SPV file was written, in a +locale-specific format, e.g. @code{Friday, May 16, 2014 6:47:37 PM +PDT} or @code{lunedì 17 marzo 2014 3.15.48 CET} or even @code{Friday, +December 5, 2014 5:00:19 o'clock PM EST}. +@end defvr + +@defvr {Optional} @code{lockReader} +Whether a reader should be allowed to edit the output. The possible +values are @code{true} and @code{false}, but the corpus only contains +@code{false}. +@end defvr + +@defvr {Optional} @code{schemaLocation} +This is actually an XML Namespace attribute. A reader may ignore it. +@end defvr + +@noindent +The following attributes have been observed only on nested +@code{heading} elements: + +@defvr {Required} @code{commandName} +The locale-invariant name of the command that produced the output, +e.g.@: @code{Frequencies}, @code{T-Test}, @code{Non Par Corr}. +@end defvr + +@defvr {Optional} @code{visibility} +To what degree the output represented by the element is visible. The +only observed value is @code{collapsed}. +@end defvr + +@defvr {Optional} @code{locale} +The locale used for output, in Windows format, which is similar to the +format used in Unix with the underscore replaced by a hyphen, e.g.@: +@code{en-US}, @code{en-GB}, @code{el-GR}, @code{sr-Cryl-RS}. +@end defvr + +@defvr {Optional} @code{olang} +The output language, e.g.@: @code{en}, @code{it}, @code{es}, +@code{de}, @code{pt-BR}. +@end defvr + +@node SPV label Element +@subsection The @code{label} Element + +Parent: @code{heading} or @code{container} @* +Contents: text + +Every @code{heading} and @code{container} holds a @code{label} as its +first child. The root @code{heading} in a structure member always +contains the string ``Output''. Otherwise, the text in @code{label} +describes what it labels, often by naming the statistical procedure +that was executed, e.g.@: ``Frequencies'' or ``T-Test''. Labels are +often very generic, especially within a @code{container}, e.g.@: +``Title'' or ``Warnings'' or ``Notes''. Label text is localized +according to the output language, e.g.@: in Italian a frequency table +procedure is labeled ``Frequenze''. + +The corpus contains one example of an empty label, one that contains +no text. + +This element has no attributes. + +@node SPV container Element +@subsection The @code{container} Element + +Parent: @code{heading} @* +Contents: @code{label} [@code{table} @math{|} @code{text}] + +A @code{container} serves to label a @code{table} or a @code{text} +item. + +This element has the following attributes. + +@defvr {Required} @code{visibility} +Either @code{visible} or @code{hidden}, this indicates whether the +container's content is displayed. +@end defvr + +@defvr {Optional} @code{text-align} +Presumably indicates the alignment of text within the container. The +only observed value is @code{left}. Observed with nested @code{table} +and @code{text} elements. +@end defvr + +@defvr {Optional} @code{width} +The width of the container in the form @code{@var{n}px}, e.g.@: +@code{1097px}. +@end defvr + +@node SPV text Element (Inside @code{container}) +@subsection The @code{text} Element (Inside @code{container}) + +Parent: @code{container} @* +Contents: @code{html} + +This @code{text} element is nested inside a @code{container}. There +is a different @code{text} element that is nested inside a +@code{pageParagraph}. + +This element has the following attributes. + +@defvr {Required} @code{type} +One of @code{title}, @code{log}, or @code{text}. +@end defvr + +@defvr {Optional} @code{commandName} +As on the @code{heading} element. For output not specific to a +command, this is simply @code{log}. The corpus contains one example +of where @code{commandName} is present but set to the empty string. +@end defvr + +@defvr {Optional} @code{creator-version} +As on the @code{heading} element. +@end defvr + +@node SPV html Element +@subsection The @code{html} Element + +Parent: @code{text} @* +Contents: CDATA + +The CDATA contains an HTML document. In some cases, the document +starts with @code{} and ends with @code{}. The actual content ranges from trivial to simple: +just discarding the CSS and tags yields readable results. + +This element has the following attributes. + +@defvr {Required} @code{lang} +This always contains @code{en} in the corpus. +@end defvr + +@node SPV table Element +@subsection The @code{table} Element + +Parent: @code{container} @* +Contents: @code{tableStructure} + +This element has the following attributes. + +@defvr {Required} @code{commandName} +As on the @code{heading} element. +@end defvr + +@defvr {Required} @code{type} +One of @code{table}, @code{note}, or @code{warning}. +@end defvr + +@defvr {Required} @code{subType} +The locale-invariant name for the particular kind of output that this +table represents in the procedure. This can be the same as +@code{commandName} e.g.@: @code{Frequencies}, or different, e.g.@: +@code{Case Processing Summary}. Generic subtypes @code{Notes} and +@code{Warnings} are often used. +@end defvr + +@defvr {Required} @code{tableId} +A number that uniquely identifies the table within the SPV file, +typically a large negative number such as @code{-4147135649387905023}. +@end defvr + +@defvr {Optional} @code{creator-version} +As on the @code{heading} element. In the corpus, this is only present +for version 21 and up and always includes all 8 digits. +@end defvr + +@node SPV tableStructure Element +@subsection The @code{tableStructure} Element + +Parent: @code{table} @* +Contents: @code{dataPath} + +This element has no attributes. + +@node SPV dataPath Element +@subsection The @code{dataPath} Element + +Parent: @code{tableStructure} @* +Contents: text + +Contains the name of the Zip member that holds the table details, +e.g.@: @code{0000000001437_lightTableData.bin}. + +This element has no attributes. + +@node SPV pageSetup Element +@subsection The @code{pageSetup} Element + +Parent: @code{heading} @* +Contents: @code{pageHeader} @code{pageFooter} + +This element has the following attributes. + +@defvr {Required} @code{initial-page-number} +Always @code{1}. +@end defvr + +@defvr {Optional} @code{chart-size} +Always @code{as-is} or a localization (!) of it (e.g.@: @code{dimensione +attuale}, @code{Wie vorgegeben}). +@end defvr + +@defvr {Optional} @code{margin-left} +@defvrx {Optional} @code{margin-right} +@defvrx {Optional} @code{margin-top} +@defvrx {Optional} @code{margin-bottom} +Margin sizes in the form @code{@var{size}in}, e.g.@: @code{0.25in}. +@end defvr + +@defvr {Optional} @code{paper-height} +@defvrx {Optional} @code{paper-width} +Paper sizes in the form @code{@var{size}in}, e.g.@: @code{8.5in} by +@code{11in} for letter paper or @code{8.267in} by @code{11.692in} for +A4 paper. +@end defvr + +@defvr {Optional} @code{reference-orientation} +Always @code{0deg}. +@end defvr + +@defvr {Optional} @code{space-after} +Always @code{12pt}. +@end defvr + +@node SPV pageHeader and pageFooter Elements +@subsection The @code{pageHeader} and @code{pageFooter} Elements + +Parent: @code{pageSetup} @* +Contents: @code{pageParagraph}* + +This element has no attributes. + +@node SPV pageParagraph Element +@subsection The @code{pageParagraph} Element + +Parent: @code{pageHeader} or @code{pageFooter} @* +Contents: @code{text} + +Text to go at the top or bottom of a page, respectively. + +This element has no attributes. + +@node SPV @code{text} Element (Inside @code{pageParagraph}) +@subsection The @code{text} Element (Inside @code{pageParagraph}) + +Parent: @code{pageParagraph} @* +Contents: [CDATA] + +This @code{text} element is nested inside a @code{pageParagraph}. There +is a different @code{text} element that is nested inside a +@code{container}. + +The element is either empty, or contains CDATA that holds almost-XHTML +text: in the corpus, either an @code{html} or @code{p} element. It is +@emph{almost}-XHTML because the @code{html} element designates the +default namespace as +@code{http://xml.spss.com/spss/viewer/viewer-tree} instead of an XHTML +namespace, and because the CDATA can contain substitution variables: +@code{&[Page]} for the page number and @code{&[PageTitle]} for the +page title. + +Typical contents (indented for clarity): + +@example + + + +

Page &[Page]

+ + +@end example + +This element has the following attributes. + +@defvr {Required} @code{type} +Always @code{text}. +@end defvr + +@node SPV Light Detail Member Format +@section Light Detail Member Format + +This section describes the format of ``light'' detail member +@file{.bin} files. These files have a binary format which we describe +here in terms of a context-free grammar using the following conventions: + +@table @asis +@item NonTerminal +Names of nonterminals are written in CamelCaps style. + +@item 00, 01, @dots{}, ff. +Bytes with fixed values are written in hexadecimal: + +@item i0, i1, @dots{}, i9, i10, i11, @dots{} +32-bit integers with fixed values are written in decimal, prefixed by +@samp{i}. + +@item byte +An arbitrary byte. + +@item int +An arbitrary 32-bit integer. + +@item double +An arbitrary 64-bit IEEE floating-point number. + +@item string +A 32-bit integer followed by the specified number of bytes of +character data, encoded in UTF-8. + +@item @var{x}? +@var{x} is optional, e.g.@: 00? is an optional zero byte. + +@item @var{x}*@var{n} +@var{x} is repeated @var{n} times, e.g. byte*10 for ten arbitrary bytes. + +@item @var{x}[@var{name}] +Gives @var{x} the specified @var{name}. Names are useful in textual +explanations. They are also used, also bracketed, to indicate counts, +e.g.@: int[@t{n}] byte*[@t{n}] for a 32-bit integer followed by the +specified number of arbitrary bytes. + +@item @var{a} @math{|} @var{b} +Either @var{a} or @var{b}. + +@item (@var{x}) +Parentheses are used for grouping to make precedence clear, especially +in the presence of @math{|}, e.g.@: in 00 (01 @math{|} 02 @math{|} 03) +00. + +@item count(@var{x}) +A 32-bit integer that indicates the number of bytes in @var{x}, +followed by @var{x} itself. + +@item v1(@var{x}) +In a version 1 @file{.bin} file, @var{x}; in version 3, nothing. +(The @file{.bin} file header indicates the version.) + +@item v3(@var{x}) +In a version 3 @file{.bin} file, @var{x}; in version 1, nothing. +@end table + +All integer and floating-point values in this format use little-endian +byte order. + +A ``light'' detail member @file{.bin} consists of a number of sections +concatenated together, terminated by a byte 01: + +@format +LightMember @result{} Header Title Styles Dimensions Data 01 +@end format + +The first section is a 0x27-byte header: + +@format +Header @result{} + 01 00 + (i1 @math{|} i3)[@t{version}] + 01 (00 @math{|} 01) byte*21 00 00 + int[@t{table-id}] byte*4 +@end format + +The Header includes @code{version}, a version number that affects the +interpretation of some of the other data in the member. We will refer +to ``version 1'' and ``version 3'' members later on. @code{table-id} +is a binary version of the @code{tableId} attribute in the structure +member that refers to the detail member. For example, if +@code{tableId} is @code{-4154297861994971133}, then @code{table-id} +would be 0xdca00003. The meaning of the other variable parts of the +header is not known. + +@format +Title @result{} + Value[@t{local}] 01? + Value[@t{subtype}] 01? 31 + Value[@t{c}] 01? 00? 58 + (58 @math{|} 31 Value[@t{caption}]) + int[@t{n}] Footnote*[@t{n}] +Footnote @result{} + Value[@t{text}] + (58 @math{|} 31 Value[@t{marker}]) + byte*4 +@end format + +@format +Styles @result{} + 00 Font*8 + int[@t{n1}] byte*[@t{n1}] + int[@t{n2}] byte*[@t{n2}] + int[@t{n3}] byte*[@t{n3}] + int[@t{n4}] int*[@t{n4}] + string[@t{encoding}] + (i0 @math{|} i-1) (00 @math{|} 01) 00 (00 @math{|} 01) + int + byte[@t{decimal}] byte[@t{grouping}] + int[@t{n-ccs}] string*[@t{n-ccs}] + v1(i0) + v3(count(count(X5) count(X6))) + +X5 @result{} byte*33 int[@t{n}] int*[@t{n}] +X6 @result{} + 01 00 (03 @math{|} 04) 00 00 00 + string[@t{command}] string[@t{subcommand}] + string[@t{language}] string[@t{charset}] string[@t{locale}] + (00 @math{|} 01) 00 (00 @math{|} 01) (00 @math{|} 01) + int + byte[@t{decimal}] byte[@t{grouping}] + byte*8 01 + (string[@t{dataset}] string[@t{datafile}] i0 int i0)? + int[@t{n-ccs}] string*[@t{n-ccs}] + 2e (00 @math{|} 01) (i2000000 i0)? +@end format + +In every example in the corpus, @code{n1} is 240. The meaning of the +bytes that follow it is unknown. + +In every example in the corpus, @code{n2} is 18 and the bytes that +follow it are @code{00 00 00 01 00 00 00 00 00 00 00 00 00 02 00 00 00 +00}. The meaning of these bytes is unknown. + +In every example in the corpus for version 1, @code{n3} is 16 and the +bytes that follow it are @code{00 00 00 01 00 00 00 01 00 00 00 00 01 +01 01 01}. In version 3, observed @code{n3} varies from 117 to 150, +and its bytes include a 1-byte count at offset 0x34. When the count +is nonzero, a text string of that length at offset 0x35 is the name of +a ``TableLook'', e.g. ``Default'' or ``Academic''. + +Observed values of @code{n4} vary from 0 to 17. Out of 7060 examples +in the corpus, it is nonzero only 36 times. + +@code{encoding} is a character encoding, usually a Windows code page +such as @code{en_US.windows-1252} or @code{it_IT.windows-1252}. The +encoding string is itself encoded in US-ASCII. The rest of the +character strings in the file use this encoding. + +@code{decimal} is the decimal point character. The observed values +are @samp{.} and @samp{,}. + +@code{grouping} is the grouping character. The observed values are +@samp{,}, @samp{.}, @samp{'}, @samp{ }, and zero (presumably +indicating that digits should not be grouped). + +@code{n-ccs} is observed as either 0 or 5. When it is 5, the +following strings are CCA through CCE format strings. Most commonly +these are all @code{-,,,} but other strings occur. + +@format +Font @result{} + byte[@t{index}] 31 string[@t{typeface}] + 00 00 + (10 @math{|} 20 @math{|} 40 @math{|} 50 @math{|} 70 @math{|} 80)[@t{f1}] + 41 + (i0 @math{|} i1 @math{|} i2)[@t{f2}] + 00 + (i0 @math{|} i2 @math{|} i64173)[@t{f3}] + (i0 @math{|} i1 @math{|} i2 @math{|} i3)[@t{f4}] + string[@t{fgcolor}] string[@t{bgcolor}] + i0 i0 00 + v3(int[@t{f5}] int[@t{f6}] int[@t{f7}] int[@t{f8}])) +@end format + +Each Font, in order, represents the font style for a different +element: title, caption, footnote, row labels, column labels, corner +labels, data, and layers. + +@code{index} is the 1-based index of the Font, i.e. 1 for the first +Font, through 8 for the final Font. + +@code{typeface} is the string name of the font. In the corpus, this +is @code{SansSerif} in over 99% of instances and @code{Times New +Roman} in the rest. + +@code{fgcolor} and @code{bgcolor} are the foreground color and +background color, respectively. In the corpus, these are always +@code{#000000} and @code{#ffffff}, respectively. + +The meaning of the remaining data is unknown. It seems likely to +include font sizes, horizontal and vertical alignment, attributes such +as bold or italic, and margins. @code{f1} is @code{40} most of the +time. @code{f2} is @code{i1} most of the time for the title and +@code{i0} most of the time for other fonts. + +The table below lists the values observed in the corpus. When a cell +contains a single value, then 99@math{+}% of the corpus contains that value. +When a cell contains a pair of values, then the first value is seen in +about two-third of the corpus and the second value in about the +remaining one-third. In fonts that include multiple pairs, values are +correlated, that is, for font 3, f5 = 24, f6 = 24, f7 = 2 appears +about two-thirds of the time, as does the combination of f4 = 0, f6 = +10 for font 7. + +@multitable {font} {40} {f2} {64173} {0/1} {24/11} {10/11} {2/3} {f8} +@headitem font @tab f1 @tab f2 @tab f3 @tab f4 @tab f5 @tab f6 @tab f7 @tab f8 +@item 1 @tab 40 @tab 1 @tab 0 @tab 0 @tab 8 @tab 10/11 @tab 1 @tab 8 +@item 2 @tab 40 @tab 0 @tab 2 @tab 1 @tab 8 @tab 10/11 @tab 1 @tab 1 +@item 3 @tab 40 @tab 0 @tab 2 @tab 1 @tab 24/11 @tab 24/ 8 @tab 2/3 @tab 4 +@item 4 @tab 40 @tab 0 @tab 2 @tab 3 @tab 8 @tab 10/11 @tab 1 @tab 1 +@item 5 @tab 40 @tab 0 @tab 0 @tab 1 @tab 8 @tab 10/11 @tab 1 @tab 4 +@item 6 @tab 40 @tab 0 @tab 2 @tab 1 @tab 8 @tab 10/11 @tab 1 @tab 4 +@item 7 @tab 40 @tab 0 @tab 64173 @tab 0/1 @tab 8 @tab 10/11 @tab 1 @tab 1 +@item 8 @tab 40 @tab 0 @tab 2 @tab 3 @tab 8 @tab 10/11 @tab 1 @tab 4 +@end multitable + +@format +Dimensions @result{} int[@t{n-dims}] Dimension*[@t{n-dims}] +Dimension @result{} + value[@t{name}] + byte[@t{d1}] + (00 @math{|} 01 @math{|} 02)[@t{d2}] + (i0 @math{|} i2)[@t{d3}] + (00 @math{|} 01)[@t{d4}] + (00 @math{|} 01)[@t{d5}] + 01 + int[@t{d6}] + int[@t{n-categories}] category*[@t{n-categories}] +@end format + +@code{name} is the name of the dimension, e.g. @code{Variables}, +@code{Statistics}, or a variable name. + +@code{d1} is usually 0 but many other values have been observed. + +@code{d3} is 2 over 99% of the time. + +@code{d5} is 0 over 99% of the time. + +@code{d6} is either -1 or the 0-based index of the dimension, e.g.@: 0 +for the first dimension, 1 for the second, and so on. The latter is +the case 98% of the time in the corpus. + +@format +Category @result{} value[@t{name}] (Terminal @math{|} Group) +Terminal @result{} 00 00 00 i2 int[@t{index}] i0 +Group @result{} + (00 @math{|} 01)[@t{merge}] 00 01 (i0 @math{|} i2)[@t{data}] + i-1 int[@t{n-subcategories}] category*[@t{n-subcategories}] +@end format + +@code{name} is the name of the category (or group). + +A Category can represent a terminal category. In that case, +@code{index} is a nonnegative integer less than @code{n-categories} in +the Dimension in which the Category is nested (directly or +indirectly). + +Alternatively, a Category can represent a Group of nested categories. +Usually a Group has some nested content, so that +@code{n-subcategories} is positive, but a few Groups with +@code{n-subcategories} 0 has been observed. + +If a Group's @code{merge} is 00, the most common value, then the group +is really a distinct group that should be represented as such in the +visual representation and user interface. If @code{merge} is 01, +however, the categories in this group should be shown and treated as +if they were direct children of the group's containing group (or if it +has no parent group, then direct children of the dimension), and this +group's name is irrelevant and should not be displayed. (Merged +groups can be nested!) + +@code{data} appears to be i2 when all of the categories within a group +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. + +@format +Data @result{} + int[@t{layers}] int[@t{rows}] int[@t{columns}] int*[@t{n-dimensions}] + int[@t{n-data}] Datum*[@t{n-data}] +@end format + +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. + +@format +Datum @result{} int64[@t{index}] v3(00?) Value +@end format + +The format of a Datum varies slightly from version 1 to version 3: in +version 1 it allows for an extra optional 00 byte. + +A Datum consists of an @code{index} and a Value. Suppose there are +@math{d} dimensions and dimension @math{i}, @math{0 \le i < d}, has +@math{n_i} categories. Consider the datum at coordinates @math{x_i}, +@math{0 \le i < d}, and note that @math{0 \le x_i < n_i}. Then the +index is calculated by the following algorithm: + +@display +let @i{index} = 0 +for each @math{i} from 0 to @math{d - 1}: + @i{index} = @math{n_i \times} @i{index} @math{+} @math{x_i} +@end display + +For example, suppose there are 3 dimensions with 3, 4, and 5 +categories, respectively. The datum at coordinates (1, 2, 3) has +index @math{5 \times (4 \times (3 \times 0 + 1) + 2) + 3 = 33}. + +@format +Value @result{} 00? 00? 00? 00? RawValue +RawValue @result{} + 01 ValueMod int[@t{format}] double[@t{x}] + @math{|} 02 ValueMod int[@t{format}] double[@t{x}] + string[@t{varname}] string[@t{vallab}] (01 @math{|} 02 @math{|} 03) + @math{|} 03 string[@t{local}] ValueMod string[@t{id}] string[@t{c}] (00 @math{|} 01)[@t{type}] + @math{|} 04 ValueMod int[@t{format}] string[@t{vallab}] string[@t{varname}] + (01 @math{|} 02 @math{|} 03) string[@t{s}] + @math{|} 05 ValueMod string[@t{varname}] string[@t{varlabel}] (01 @math{|} 02 @math{|} 03) + @math{|} ValueMod string[@t{format}] int[@t{n-args}] Arg*[@t{n-args}] +Arg @result{} + i0 Value + @math{|} int[@t{x}] i0 Value*[@t{x}@math{+}1] /* @t{x} @math{>} 0 */ +@end format + +A Value boils down to a number or a string. There are several +possibilities, which one can distinguish by the first nonzero byte in +the encoding. + +@table @asis +@item 01 +The numeric value @code{x}, intended to be presented to the user +formatted according to @code{format}, which is in the format described +for system files. @xref{System File Output Formats}, for details. +Most commonly, @code{format} has width 40 (the maximum). + +When @code{x} is the maximum negative double value @code{-DBL_MAX}, it +represents the system-missing value SYSMIS. (HIGHEST and LOWEST have +not been observed.) @xref{System File Format}, for more about these +special values. + +@item 02 +Similar to @code{01}, with the additional information that @code{x} is +a value of variable @code{varname} and has value label @code{vallab}. +Both @code{varname} and @code{vallab} can be the empty string, the +latter very commonly. + +The meaning of the final byte is unknown. Possibly it is connected to +whether the value or the label should be displayed. + +@item 03 +A text string, in two forms: @code{c} is in English, and sometimes +abbreviated or obscure, and @code{local} is localized to the user's +locale. In an English-language locale, the two strings are often the +same, and in the cases where they differ, @code{local} is more +appropriate for a user interface, e.g.@: @code{c} of ``Not a PxP table +for MCN...'' versus @code{local} of ``Computed only for a PxP table, +where P must be greater than 1.'' + +@code{c} and @code{local} are always either both empty or both +nonempty. + +@code{id} is a brief identifying string whose form seems to resemble a +programming language identifier, e.g.@: @code{cumulative_percent} or +@code{factor_14}. It is not unique. + +@code{type} is 00 for text taken from user input, such as syntax +fragment, expressions, file names, data set names, and 01 for fixed +text strings such as names of procedures or statistics. In the former +case, @code{id} is always the empty string; in the latter case, +@code{id} is still sometimes empty. + +@item 04 +The string value @code{s}, intended to be presented to the user +formatted according to @code{format}. The format for a string is not +too interesting, and the corpus contains many clearly invalid formats +like A16.39 or A255.127 or A134.1, so readers should probably ignore +the format entirely. + +@code{s} is a value of variable @code{varname} and has value label +@code{vallab}. @code{varname} is never empty but @code{vallab} is +commonly empty. + +The meaning of the final byte is unknown. + +@item 05 +Variable @code{varname}, which is rarely observed as empty in the +corpus, with variable label @code{varlabel}, which is often empty. + +The meaning of the final byte is unknown. + +@item 31 +@itemx 58 +(These bytes begin a ValueMod.) A format string, analogous to +@code{printf}, followed by one or more arguments, each of which has +one or more values. The format string uses the following syntax: + +@table @code +@item \% +@itemx \: +@itemx \[ +@itemx \] +Each of these expands to the character following @samp{\\}, to escape +characters that have special meaning in format strings. These are +effective inside and outside the @code{[@dots{}]} syntax forms +described below. + +@item \n +Expands to a new-line, inside or outside the @code{[@dots{}]} forms +described below. + +@item ^@var{i} +Expands to a formatted version of argument @var{i}, which must have +only a single value. For example, @code{^1} expands to the first +argument's @code{value}. + +@item [:@var{a}:]@var{i} +Expands @var{a} for each of the values in @var{i}. @var{a} +should contain one or more @code{^@var{j}} conversions, which are +drawn from the values for argument @var{i} in order. Some examples +from the corpus: + +@table @code +@item [:^1:]1 +All of the values for the first argument, concatenated. + +@item [:^1\n:]1 +Expands to the values for the first argument, each followed by +a new-line. + +@item [:^1 = ^2:]2 +Expands to @code{@var{x} = @var{y}} where @var{x} is the second +argument's first value and @var{y} is its second value. (This would +be used only if the argument has two values. If there were more +values, the second and third values would be directly concatenated, +which would look funny.) +@end table + +@item [@var{a}:@var{b}:]@var{i} +This extends the previous form so that the first values are expanded +using @var{a} and later values are expanded using @var{b}. For an +unknown reason, within @var{a} the @code{^@var{j}} conversions are +instead written as @code{%@var{j}}. Some examples from the corpus: + +@table @code +@item [%1:*^1:]1 +Expands to all of the values for the first argument, separated by +@samp{*}. + +@item [%1 = %2:, ^1 = ^2:]1 +Given appropriate values for the first argument, expands to @code{X = +1, Y = 2, Z = 3}. + +@item [%1:, ^1:]1 +Given appropriate values, expands to @code{1, 2, 3}. +@end table +@end table + +The format string is localized to the user's locale. +@end table + +@format +ValueMod @result{} + 31 i0 (i0 @math{|} i1 string[@t{subscript}]) + v1(00 (i1 @math{|} i2) 00 00 int 00 00) + v3(count(FormatString + (58 @math{|} 31 Style) + (58 + @math{|} 31 i0 i0 i0 i0 01 00 (01 @math{|} 02 @math{|} 08) + 00 08 00 0a 00))) + @math{|} 31 i1 int[@t{footnote-number}] Format + @math{|} 31 i2 (00 @math{|} 01 @math{|} 02) 00 (i1 @math{|} i2 @math{|} i3) Format + @math{|} 31 i3 00 00 01 00 i2 Format + @math{|} 58 + +Style @result{} 01? 00? 00? 00? 01 string[@t{fgcolor}] string[@t{bgcolor}] string[@t{font}] byte +Format @result{} 00 00 count(FormatString (58 @math{|} 31 Style) 58) +FormatString @result{} count((i0 (58 @math{|} 31 string))?) +@end format + +A ValueMod can specify special modifications to a Value: + +@itemize @bullet +@item +The @code{footnote-number}, if present, specifies a footnote that the +Value references. The footnote's marker is shown appended to the main +text of the Value, as a superscript. + +@item +The @code{subscript}, if present, specifies a string to append to the +main text of the Value, as a subscript. The subscript text is +normally a brief indicator, e.g.@: @samp{a} or @samp{a,b}, with its +meaning indicated by the table caption. In this usage, subscripts are +similar to footnotes; one apparent difference is that a Value can only +reference one footnote but a subscript can list more than one letter. + +@item +The Format, if present, is a format string for substitutions using the +syntax explained previously. It appears to be an English-language +version of the localized format string in the Value in which the +Format is nested. + +@item +The Style, if present, changes the style for this individual Value. +@end itemize + +@node SPV Legacy Detail Member Binary Format +@section Legacy Detail Member Binary Format + +Whereas the light binary format represents everything about a given +pivot table, the legacy binary format conceptually consists of a +number of named sources, each of which consists of a number of named +series, each of which is a 1-dimensional array of numbers or strings +or a mix. Thus, the legacy binary file format is quite simple. + +This section uses the same context-free grammar notation as in the +previous section, with the following additions: + +@table @asis +@item vAF(@var{x}) +In a version 0xaf legacy member, @var{x}; in other versions, nothing. +(The legacy member header indicates the version; see below.) + +@item vB0(@var{x}) +In a version 0xb0 legacy member, @var{x}; in other versions, nothing. +@end table + +@format +LegacyBinary @result{} + 00 byte[@t{version}] int16[@t{n-sources}] int[@t{file-size}] + Metadata*[@t{n-sources}] Data*[@t{n-sources}] +@end format + +@code{version} is a version number that affects the interpretation of +some of the other data in the member. Versions 0xaf and 0xb0 are +known. We will refer to ``version 0xaf'' and ``version 0xb0'' members +later on. + +A legacy member consists of @code{n-sources} data sources, each of +which has Metadata and Data. + +@code{file-size} is the size of the file, in bytes. + +@format +Metadata @result{} + int[@t{per-series}] int[@t{n-series}] int[@t{ofs}] + vAF(byte*32[@t{source-name}]) + vB0(byte*64[@t{source-name}] int[@t{x}]) +@end format + +A data source consists of @code{n-series} series of data, with +@code{per-series} data values per series. + +@code{source-name} is a 32- or 64-byte string padded on the right with +zero bytes. The names that appear in the corpus are very generic, +usually @code{tableData} or @code{source0}. + +The @code{ofs} is the offset, in bytes, from the beginning of the file +to the start of this data source's Data. This allows programs to skip +to the beginning of the data for a particular source; it is also +important to determine whether a source includes any string data (see +below). + +The meaning of @code{x} in version 0xb0 is unknown. + +@format +Data @result{} NumericData StringData? +NumericData @result{} NumericSeries*[@t{n-series}] +NumericSeries @result{} byte*288[@t{series-name}] double*[@t{per-series}] +@end format + +Data follow the Metadata in the legacy binary format, with sources in +the same order. Each NumericSeries begins with a @code{series-name} +that generally indicates its role in the pivot table, e.g.@: ``cell'', +``cellFormat'', ``dimension0categories'', ``dimension0group0''. The +name is followed by the data, one double per element in the series. A +double with the maximum negative double @code{-DBL_MAX} represents the +system-missing value SYSMIS. + +@format +StringData @result{} i1 string[@t{source-name}] Pairs Labels + +Pairs @result{} int[@t{n-string-series}] PairSeries*[@t{n-string-series}] +PairSeries @result{} string[@t{pair-series-name}] int[@t{n-pairs}] Pair*[@t{n-pairs}] +Pair @result{} int[@t{i}] int[@t{j}] + +Labels @result{} int[@t{n-labels}] Label*[@t{n-labels}] +Label @result{} int[@t{frequency}] int[@t{s}] +@end format + +A source may include a mix of numeric and string data values. When a +source includes any string data, the data values that are strings are +set to SYSMIS in the NumericSeries, and StringData follows the +NumericData. A source that contains no string data omits the +StringData. To reliably determine whether a source includes +StringData, the reader should check whether the offset following the +Numericdata is the offset of the next series, as indicated by its +Metadata (or end of file, in the case of the last source in a file). + +StringData repeats the name of the source. + +The string data overlays the numeric data. @code{n-string-series} is +the number of series within the source that include string data. More +precisely, it is the 1-based index of the last series in the source +that includes any string data; thus, it would be 4 if there are 5 +series and only the fourth one includes string data. + +Each PairSeries consists a sequence of 0 or more pairs, each of which +maps from a 0-based index within the series @code{i} to a 0-based +label index @code{j}. 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