This manual documents Guile-DSV version 0.7.0.
Copyright (C) 2014-2023 Artyom V. Poptsov
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License.”
| [ < ] | [ > ] | [Contents] | [Index] | [ ? ] |
This manual documents Guile-DSV version 0.7.0.
Copyright (C) 2014-2023 Artyom V. Poptsov
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License.”
| 1 Introduction | ||
| 2 Installation | ||
| 3 API Reference | ||
Appendices | ||
|---|---|---|
| Appendix A GNU Free Documentation License | The license of this manual. | |
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Guile-DSV is a module that provides procedures for working with delimiter-separated values (DSV) format for programs written in GNU Guile.
Guile-DSV supports both the Unix-style DSV format and RFC 4180.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Guile-DSV sources are available from GitHub at https://github.com/artyom-poptsov/guile-dsv/. This section describes requirements of Guile-DSV and installation process.
Guile-DSV depends on the following packages:
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
On GNU Guix the package can be installed as follows:
$ guix install guile-dsv
If you want to install the most recent version of Guile-DSV right from the “master” branch (on your own risk), you can use the following set of commands:
$ git clone git@github.com:artyom-poptsov/guile-dsv.git $ cd guile-dsv $ guix package -f guix.scm
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
On Ubuntu GNU/Linux, you will need the following packages:
$ sudo apt install \
make \
automake \
autoconf \
guile-3.0 \
guile-3.0-dev \
guile-library \
texinfo \
help2man
Get the sources of Guile-DSV from GitHub using Git (a good introduction to Git is Pro Git book, which is available online):
$ git clone git@github.com:artyom-poptsov/guile-dsv.git
Configure the sources:
$ cd guile-dsv/ $ autoreconf -vif $ ./configure --prefix=/usr
Build and install the library:
$ make -j$(nproc) $ make install
For a basic explanation of the installation of the package, see the ‘INSTALL’ file.
Please note that you will need
Automake version 1.12 or
later to run self-tests with make check (but the library
itself can be built with older Automake version such as 1.11).
important You probably want to call configure with
the ‘--with-guilesitedir’ option so that this package is
installed in Guile’s default path. But, if you don’t know where your
Guile site directory is, run configure without the option,
and it will give you a suggestion.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
These procedures are provided by (dsv) module.
All the procedures accept an optional format argument that specifies the format of DSV data. Allowed formats are the following symbols:
By default a format is set to 'unix.
Read DSV data in a specified format from a port. If the port is not set, read from the default input port. If a delimiter is not set, use the default delimiter for the format.
When a format is set to 'unix, lines commented with a
comment-prefix will be skipped. comment-prefix is expected to be
either a string or 'default symbol (which means to use the default
prefix for the format), or 'none symbol (that tells the procedure not
to skip anything); default value of comment-prefix for Unix format is
“#”.
Empty lines in DSV data will be converted to lists that contain one element (an empty string.)
When format is set to 'unix, then following nonprintable characters
will be escaped with backslashes: #\page, #\newline,
#\return, #\tab, #\vtab. E.g. #\page will become
“\f”.
The procedure returns a list of lists that represents a DSV table, or throws an error.
log-driver allows to set the logging driver. Possible values are:
“syslog” (used by default when log-driver is set to #f),
“file”, “null”. Using log-opt parameter one can pass additional
options for a logging driver.
The dsv-string->scm procedure works the same way as dsv->scm,
except it takes a DSV string instead of a port.
Examples:
(dsv->scm (open-input-file "/etc/passwd"))
⇒
(...
("news" "x" "9" "13" "news" "/usr/lib/news" "/bin/false")
("root" "x" "0" "0" "root" "/root" "/bin/zsh"))
(dsv-string->scm "a:b:c")
⇒ '(("a" "b" "c"))
(dsv-string->scm "a;b;c" #\;)
⇒ '(("a" "b" "c"))
(dsv-string->scm "a,b\\,c" #\,)
⇒ '(("a" "b,c"))
;; Handle backslash escapes:
(dsv-string->scm "a\\nb\\\\c\n")
⇒ '(("a\nb\\c"))
;; Handle record continuation by ignoring backslash-escaped newlines:
(dsv-string->scm "a \\\nb:c")
⇒ '(("a b" "c"))
Write a list of values list as a sequence of DSV strings in a specified format to a port. If the port is not set, write to the default output port. If a delimiter is not set, use the default delimiter for a format.
The procedure accepts either a DSV table (as a two-dimensional list), or a single table row (as a one-dimesional list of strings).
When format is set to 'unix, then the following escaped nonprintable
characters will be accepted: #\page, #\newline, #\return,
#\tab, #\vtab. E.g. “\f” will be read as #\page.
Return value is undefined. The procedure throws a dsv-parser-error on
an error.
The scm->dsv-string procedure works the same way as scm->dsv,
except it returns DSV data as a string instead of printing it to a port.
Examples:
(scm->dsv '("news" "x" "9" "13" "news" "/usr/lib/news" "/bin/false"))
-| news:x:9:13:news:/usr/lib/news:/bin/false
(scm->dsv '(("news" "x" "9" "13" "news" "/usr/lib/news" "/bin/false")
("root" "x" "0" "0" "root" "/root" "/bin/zsh")))
-|
news:x:9:13:news:/usr/lib/news:/bin/false
root:x:0:0:root:/root:/bin/zsh
(scm->dsv-string '("a" "b" "c"))
⇒ "a:b:c\n"
;; If a delimiter occures inside a field, it will be escaped with a backslash:
(scm->dsv-string '("a" "b:c"))
⇒ "a:b\\:c\n"
;; Use a custom field delimiter:
(scm->dsv-string '("a" "b" "c") #\,)
⇒ "a,b,c\n"
;; Make use of RFC 4180:
(scm->dsv-string '("a" "b" "c,d") #:format 'rfc4180)
⇒ "a,b,\"c,d\"\r\n"
;; Escape non-printable characters and backslashes:
(scm->dsv-string '("a\nb" "c\\d"))
⇒ "a\\nb:c\\\\d\n"
Guess a DSV string delimiter. Optionally accept a list of
known-delimiters as an argument. Default known delimiters are:
#\,, #\:, #\;, #\|, #\tab, #\space.
The procedure returns #f if it cannot determine a delimiter based on
the given arguments. If an error occured then it throws
dsv-parser-error.
Note that when known-delimiters list contains less than two elements,
the procedure returns #f.
Examples:
(guess-delimiter "a:b,c,d") ⇒ #\, (guess-delimiter "a,b:c") ⇒ #f (guess-delimiter "a,b,c" #:format 'rfc4180) ⇒ #\, ;; Using custom known delimiters list: (guess-delimiter "a-b-c" '(#\- #\,)) ⇒ #\-
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Module (dsv table) provides procedures for working with parsed DSV
tables.
Multiply a string str by k in a Python way to construct a new string from Kth instances of str. Return the new string.
Use a style terminal escape codes to change the style of a string str. Return the styled string with escape codes.
Print an element of a table to a port. If an element is
#f, then print a single space.
Print all known table parameters to a port.
Convert a shorthand sh to a table parameter.
Get maximum field width for each row of table.
Print a formatted table to a port, using borders specification.
Apply a procedure PROC to each cell of a table. Return a new table.
Remove all the rows from a table for which procedure proc returns
#f.
Remove all the columns from a table for which procedure proc
returns #f.
Wrap a table in such way that the table will fit into width columns.
current-column-widths should be the value returned by get-width
procedure.
Wrap a table row to fit each cell it into the specified widths. Return a list where each row is represented as a sub-list of strings.
Slice a string s into parts of width length. Return the list of strings.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Module (dsv table-preset) provides procedures for working with table
presets. A table preset is a pre-defined table style that specifies table
outer borders, row separators etc.
Print all known table presets to a port.
Read table preset name from a file. Return the preset as a list.
Override a table preset with a borders specification. Return the updated table preset.
Check if a string is a table preset name.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Module (dsv version) contains procedures that allow to acquire
information about the Guile-DSV version in the Semantic Versioning format.
Guile-DSV version consists of three parts:
MAJOR.MINOR.PATCH
The procedures below allow to get any of the version part or the version as a whole.
Get the raw Guile-DSV version as a string.
Return the Guile-DSV version as a list of the following form:
'(MAJOR MINOR PATCH)
Get the MAJOR, MINOR or PATCH parts of the Guile-DSV version.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Enable or disable debugging traces by setting the debug mode to an enabled? boolean value.
By default the debug mode is disabled.
| [ << ] | [ < ] | [ Up ] | [ > ] | [ >> ] | [Top] | [Contents] | [Index] | [ ? ] |
Version 1.3, 3 November 2008
Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. http://fsf.org/ Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
The purpose of this License is to make a manual, textbook, or other functional and useful document free in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others.
This License is a kind of “copyleft”, which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software.
We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference.
This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The “Document”, below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as “you”. You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law.
A “Modified Version” of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.
A “Secondary Section” is a named appendix or a front-matter section of the Document that deals exclusively with the relationship of the publishers or authors of the Document to the Document’s overall subject (or to related matters) and contains nothing that could fall directly within that overall subject. (Thus, if the Document is in part a textbook of mathematics, a Secondary Section may not explain any mathematics.) The relationship could be a matter of historical connection with the subject or with related matters, or of legal, commercial, philosophical, ethical or political position regarding them.
The “Invariant Sections” are certain Secondary Sections whose titles are designated, as being those of Invariant Sections, in the notice that says that the Document is released under this License. If a section does not fit the above definition of Secondary then it is not allowed to be designated as Invariant. The Document may contain zero Invariant Sections. If the Document does not identify any Invariant Sections then there are none.
The “Cover Texts” are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at most 25 words.
A “Transparent” copy of the Document means a machine-readable copy, represented in a format whose specification is available to the general public, that is suitable for revising the document straightforwardly with generic text editors or (for images composed of pixels) generic paint programs or (for drawings) some widely available drawing editor, and that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. A copy made in an otherwise Transparent file format whose markup, or absence of markup, has been arranged to thwart or discourage subsequent modification by readers is not Transparent. An image format is not Transparent if used for any substantial amount of text. A copy that is not “Transparent” is called “Opaque”.
Examples of suitable formats for Transparent copies include plain ASCII without markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly available DTD, and standard-conforming simple HTML, PostScript or PDF designed for human modification. Examples of transparent image formats include PNG, XCF and JPG. Opaque formats include proprietary formats that can be read and edited only by proprietary word processors, SGML or XML for which the DTD and/or processing tools are not generally available, and the machine-generated HTML, PostScript or PDF produced by some word processors for output purposes only.
The “Title Page” means, for a printed book, the title page itself, plus such following pages as are needed to hold, legibly, the material this License requires to appear in the title page. For works in formats which do not have any title page as such, “Title Page” means the text near the most prominent appearance of the work’s title, preceding the beginning of the body of the text.
The “publisher” means any person or entity that distributes copies of the Document to the public.
A section “Entitled XYZ” means a named subunit of the Document whose title either is precisely XYZ or contains XYZ in parentheses following text that translates XYZ in another language. (Here XYZ stands for a specific section name mentioned below, such as “Acknowledgements”, “Dedications”, “Endorsements”, or “History”.) To “Preserve the Title” of such a section when you modify the Document means that it remains a section “Entitled XYZ” according to this definition.
The Document may include Warranty Disclaimers next to the notice which states that this License applies to the Document. These Warranty Disclaimers are considered to be included by reference in this License, but only as regards disclaiming warranties: any other implication that these Warranty Disclaimers may have is void and has no effect on the meaning of this License.
You may copy and distribute the Document in any medium, either commercially or noncommercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3.
You may also lend copies, under the same conditions stated above, and you may publicly display copies.
If you publish printed copies (or copies in media that commonly have printed covers) of the Document, numbering more than 100, and the Document’s license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a computer-network location from which the general network-using public has access to download using public-standard network protocols a complete Transparent copy of the Document, free of added material. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public.
It is requested, but not required, that you contact the authors of the Document well before redistributing any large number of copies, to give them a chance to provide you with an updated version of the Document.
You may copy and distribute a Modified Version of the Document under the conditions of sections 2 and 3 above, provided that you release the Modified Version under precisely this License, with the Modified Version filling the role of the Document, thus licensing distribution and modification of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in the Modified Version:
If the Modified Version includes new front-matter sections or appendices that qualify as Secondary Sections and contain no material copied from the Document, you may at your option designate some or all of these sections as invariant. To do this, add their titles to the list of Invariant Sections in the Modified Version’s license notice. These titles must be distinct from any other section titles.
You may add a section Entitled “Endorsements”, provided it contains nothing but endorsements of your Modified Version by various parties—for example, statements of peer review or that the text has been approved by an organization as the authoritative definition of a standard.
You may add a passage of up to five words as a Front-Cover Text, and a passage of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts in the Modified Version. Only one passage of Front-Cover Text and one of Back-Cover Text may be added by (or through arrangements made by) any one entity. If the Document already includes a cover text for the same cover, previously added by you or by arrangement made by the same entity you are acting on behalf of, you may not add another; but you may replace the old one, on explicit permission from the previous publisher that added the old one.
The author(s) and publisher(s) of the Document do not by this License give permission to use their names for publicity for or to assert or imply endorsement of any Modified Version.
You may combine the Document with other documents released under this License, under the terms defined in section 4 above for modified versions, provided that you include in the combination all of the Invariant Sections of all of the original documents, unmodified, and list them all as Invariant Sections of your combined work in its license notice, and that you preserve all their Warranty Disclaimers.
The combined work need only contain one copy of this License, and multiple identical Invariant Sections may be replaced with a single copy. If there are multiple Invariant Sections with the same name but different contents, make the title of each such section unique by adding at the end of it, in parentheses, the name of the original author or publisher of that section if known, or else a unique number. Make the same adjustment to the section titles in the list of Invariant Sections in the license notice of the combined work.
In the combination, you must combine any sections Entitled “History” in the various original documents, forming one section Entitled “History”; likewise combine any sections Entitled “Acknowledgements”, and any sections Entitled “Dedications”. You must delete all sections Entitled “Endorsements.”
You may make a collection consisting of the Document and other documents released under this License, and replace the individual copies of this License in the various documents with a single copy that is included in the collection, provided that you follow the rules of this License for verbatim copying of each of the documents in all other respects.
You may extract a single document from such a collection, and distribute it individually under this License, provided you insert a copy of this License into the extracted document, and follow this License in all other respects regarding verbatim copying of that document.
A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, is called an “aggregate” if the copyright resulting from the compilation is not used to limit the legal rights of the compilation’s users beyond what the individual works permit. When the Document is included in an aggregate, this License does not apply to the other works in the aggregate which are not themselves derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to these copies of the Document, then if the Document is less than one half of the entire aggregate, the Document’s Cover Texts may be placed on covers that bracket the Document within the aggregate, or the electronic equivalent of covers if the Document is in electronic form. Otherwise they must appear on printed covers that bracket the whole aggregate.
Translation is considered a kind of modification, so you may distribute translations of the Document under the terms of section 4. Replacing Invariant Sections with translations requires special permission from their copyright holders, but you may include translations of some or all Invariant Sections in addition to the original versions of these Invariant Sections. You may include a translation of this License, and all the license notices in the Document, and any Warranty Disclaimers, provided that you also include the original English version of this License and the original versions of those notices and disclaimers. In case of a disagreement between the translation and the original version of this License or a notice or disclaimer, the original version will prevail.
If a section in the Document is Entitled “Acknowledgements”, “Dedications”, or “History”, the requirement (section 4) to Preserve its Title (section 1) will typically require changing the actual title.
You may not copy, modify, sublicense, or distribute the Document except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense, or distribute it is void, and will automatically terminate your rights under this License.
However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, receipt of a copy of some or all of the same material does not give you any rights to use it.
The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See http://www.gnu.org/copyleft/.
Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License “or any later version” applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation. If the Document specifies that a proxy can decide which future versions of this License can be used, that proxy’s public statement of acceptance of a version permanently authorizes you to choose that version for the Document.
“Massive Multiauthor Collaboration Site” (or “MMC Site”) means any World Wide Web server that publishes copyrightable works and also provides prominent facilities for anybody to edit those works. A public wiki that anybody can edit is an example of such a server. A “Massive Multiauthor Collaboration” (or “MMC”) contained in the site means any set of copyrightable works thus published on the MMC site.
“CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0 license published by Creative Commons Corporation, a not-for-profit corporation with a principal place of business in San Francisco, California, as well as future copyleft versions of that license published by that same organization.
“Incorporate” means to publish or republish a Document, in whole or in part, as part of another Document.
An MMC is “eligible for relicensing” if it is licensed under this License, and if all works that were first published under this License somewhere other than this MMC, and subsequently incorporated in whole or in part into the MMC, (1) had no cover texts or invariant sections, and (2) were thus incorporated prior to November 1, 2008.
The operator of an MMC Site may republish an MMC contained in the site under CC-BY-SA on the same site at any time before August 1, 2009, provided the MMC is eligible for relicensing.
To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page:
Copyright (C) year your name. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''.
If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the “with…Texts.” line with this:
with the Invariant Sections being list their titles, with
the Front-Cover Texts being list, and with the Back-Cover Texts
being list.
If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation.
If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.
| [Top] | [Contents] | [Index] | [ ? ] |
| [Top] | [Contents] | [Index] | [ ? ] |
This document was generated on September 2, 2023 using texi2html 5.0.
The buttons in the navigation panels have the following meaning:
| Button | Name | Go to | From 1.2.3 go to |
|---|---|---|---|
| [ << ] | FastBack | Beginning of this chapter or previous chapter | 1 |
| [ < ] | Back | Previous section in reading order | 1.2.2 |
| [ Up ] | Up | Up section | 1.2 |
| [ > ] | Forward | Next section in reading order | 1.2.4 |
| [ >> ] | FastForward | Next chapter | 2 |
| [Top] | Top | Cover (top) of document | |
| [Contents] | Contents | Table of contents | |
| [Index] | Index | Index | |
| [ ? ] | About | About (help) |
where the Example assumes that the current position is at Subsubsection One-Two-Three of a document of the following structure:
This document was generated on September 2, 2023 using texi2html 5.0.