Keyboard Layout Editor GSOC project
I got accepted for a GSOC project with the X.Org Foundation. My mentor is Sergey Udaltsov and I look forward working with him.
The project is about creating a Keyboard Layout Editor, that can be used to edit XKB files with a nice GUI.
I will be blogging about these from here (fdo category at this blog).
OpenOffice Writer training notes (request: make training video plz!)
OpenOffice.org is one of the most important layers of the open-source stack. Although it does a superb job, we really need to make effort to get more users working on it.
Here we present training notes for the use of Writer, the word processor component of OpenOffice.org. We aim to make the best use of styles by creating well-structured documents. What we show here is built on work of others, including the OpenOffice Linux.com articles by Bruce Byfield, the amazing OpenOffice.org documentation and the spot-on article of Christian Paratschek at osnews.com. Actually, the following follow more or less Christian's article.
When training in OpenOffice.org, it is important to create a fluid workflow that starts from the basics and increases gradually in complexity. It would be great if someone could turn the notes in a training video.
- We start of with running OpenOffice.org Writer. The default windows appears. Compared with other word processors, in OOo we see this text boundary in the document (the dim rectangle that shows the area we can write in). We mention we can show/hide it with View/Text boundaries.
- When creating a document, it is good to set the properties such as Title and Subject. We do that from File/Properties/Description. It may look too much effort now, but it will help us later wherever we want to write the document title or subject. Use Using OpenOffice.org Writer for title and How to write nice document in OpenOffice.org Writer for subject.
- Writer supports styles which makes life much easier. You probably have used styles before; using Heading 1, Heading 2 for headings so that you can create easily the Table of Contents. Writer has a Styles and Formatting window that is accessible from the icon/button near the File menu. The icon looks like a hand clicking on a 3x3 grid. You can also get the windows from Format/Styles and Formatting, or by simply pressing F11. Once you do that, you get a floating window. You can dock it by dragging it to the right edge of the Writer window. If you are into 3D desktop, it may not be easy to dock (it automatically switches to another side of the desktop cube). In this case, use the key combination Ctrl-Shift-F10 to dock the Styles and Formatting window. It is good here to resize the document (that is, change the magnification) so that it appears centered with little empty space around.
- Writer supports styles, not only for Paragraphs (like Heading 1) but also for Pages. See the status bar at the bottom of the Writer window; it mentions Default which is the default page style. When we write a document, the first page is good to have a distinct style that is appropriate to the properties of a first page. This includes, making sure the second page appears empty, the page gets no page numbering and so on. On the Styles and Formating dock we select the Page styles tab and we double-click on the First Page style. This will set the current page to the First Page style, and we can verify visually by looking at the status bar (Now First Page instead of the old Default).
- We are not writing yet; lets create the subsequent pages first. To do so, we insert manual breaks in our document. Click on Insent/Manual Break.../ and select to insert a Page Break. As style for the page after the break choose the Index page style, tick on Change page number, and make sure the numbering starts from 1. Click OK. Proper documents start numbering from the Index page. The Index page is the page we put the Table of Contents, Table of Figures and so on.
- Make sure the cursor is on the new page with the Index style. We need to create a new page break, so that we can get writing the actual document. Click on Insert/Manual Break.../ and select a Page Break. As style for the page after the break you can choose Default. Leave any page numbering settings as is because it inherits from before. Click OK.
- Now, to view what we have achieved, let's go to Print Preview, and choose to see four pages at a time. We can see the first page, another page which is intentionally left blank, the Index page and the Default page. Close Print preview and return to the document.
- Now let's go back to the first page. We want to put the title on the first page. Nothing extravagant, at least yet. What we do is we visit the Paragraph styles and find the Title style. While the cursor is on the first page at the start, we double-click on the Title style. The cursor moves the the center of the document and we can verify that the Title paragraph style has been applied; see on the right of the Styles and Formating icon on the top-left of the Writer window. Shall we write the title of the document now? Not so fast. We can insert the title as a field, because we already wrote it in the properties at the beginning in Step 2. Click Insert/Fields/Title.
- Now press Enter; the cursor moves down and it somehow automatically changes to the Subtitle style. Styles in OpenOffice allow you to choose a Next style (a followup style) and in this case, when someone presses Enter on the Title style, they get a new paragraph in the Subtitle style. While in the line/paragraph with Subtitle style, click on Insert/Field.../Subject. Fields in OpenOffice.org appear with a dark gray background; this does not appear in printing, it is just there to help you identify where the fields are.
- Now lets move to the last page, the page with Default style and write something. Select the Heading 1 paragraph style and type Introduction. Press enter and you notice that the next style is Text body. Text body is the natural paragraph style for text in Writer (most documents have the default Default paragraph style which is wrong). Now write something in Text Body such as I love writing documents in OpenOffice.org Writer. Copy the line and paste several times so that we get a nice paragraph of at least five lines. Make sure when pasting that after a full stop there should be a single space, then the new sentence starts.
- Press Enter and now we are ready to add a new heading. Type Writing documents and set the Heading 1 paragraph style. Press Enter and fill up a paragraph with more of I love writing documents in OpenOffice.org Writer.
- Press Enter and create a new section (add a Heading 2, name it Writing documents in style and fill up a corresponding paragraph).
- Press Enter and create a last section (add a Heading 1, name it Conclusion, and fill up a corresponding paragraph style).
- Now we are ready to place the cursor at the Index page we created before, and go for the Table of Contents. Click on Insert/Indexes and Tables/Indexes and Tables. The default index type is Table of Contents. We keep the default settings and click OK. We get a nice looking table of contents.
- At this stage we have a complete basic document, with first page, index page and default page.
The next set of steps include more polishing and adding extra elements to our document.
- The text body style is configured to have the left alignment by default. Normally, one would select paragraphs and click on a paragraph alignment button on the toolbar to change the alignment. Because we are using styles, we can modify the Text Body style to have another alignment, and presto the whole document with text in the same style follow suit. In the Styles and Formating dock, at the paragraph styles tab, select the Text Body style. Right-click on the Text Body style and choose to Modify style. Find the Alignment tab and choose Justified as the new alignment for Text Body paragraphs. Click Ok and observe the document changing to the new configuration.
- It is nice to the section numbers on the headings, such as 2.1 Writing documents in style. To do this, we need to change the default outline numbering. Click on Tools/Outline numbering... and select to modify the numbering for all levels (under Level, click 1-10). Then, under the Numbering group, change the Number option from the default None to 1, 2, 3, .... Click OK and the number is changed in the document.
- Go back to the Table of Contents. You notice that the numbering format does not look nice; some section numbers are too close to the section names. To fix, right click on the gray area of the table of contents and select Edit Index/Table. In the new dialog box, select the Entries tab. Under Structure and Formatting you can see the structure of each line of line in the table of contents table. The button labeled E# is the placeholder for the chapter number. After that there is a placeholder that you can actually type text. In our case we simply click and press the space bar to add another space. We then click the All button and finally click OK. Now, all entries in the Table of contents will have a space between the chapter number and chapter title.
- In order to add a footer with the current page number, click on Insert/Footer and pick Index, then Default. Both the Index and the Default style of pages get to show page numbers. Then, place the cursor in the footer area and Insert/Field/Page Number. You can modify the Footer paragraph style so that the text alignment is centered. You have to insert the field in both an Index page and a Default page.
- The page number in the Index page is commonly shown in Roman lowercase numbers. How can we fix that? We simply have to modify the Index page style accordingly; click on the Page Styles tab in Styles and Formatting, click to modify the Index page style, and at the Page tab in Layout Settings select the i, ii, iii, ... format. Click OK.
- It would be nice to have the title on the header of each page, either Index or Default. Click on Insert/Header and add a header for Index and Default. Then, place the cursor in the header for both styles and click to add the Title field (Insert/Field/Title). Would it be nice to put a line under the header? The header text has the Header paragraph style. In the Styles and Formatting, click the Paragraph styles tab and select the Header paragraph style. Right-click and choose to Modify. In the Borders tab enable a bottom line and click OK.
You can download this sample document (.odt) from the link Using OpenOffice.org Writer.
I'll stop here for now. There are more to put such as Table of Figures, Index of Tables and Bibliography.
It would be good to leave feedback if there is interest to work on this direction.
Update 15Mar2008: This appears to be a Farsi translation/adaptation of the article.
Localisation issues in home directory folders (xdg-user-dirs)
In new distributions such as Ubuntu 7.10 there is now support for folder names of personal data in your local language. What this means is that ~/Desktop can now be called ~/Επιφάνεια εργασίας. You also get a few more default folders, including ~/Music, ~/Documents, ~/Pictures and so on.
This functionality of localised home folders has become available thanks to a new FreeDesktop standard, XDG-USER-DIRS. xdg-user-dirs can be localised, and the current localisations are available at xdg-user-dirs/po.

A potential issue arises when a user logs in with different locales; how does the system switch between the localised versions of the folder names? For GNOME there is a migration tool; as soon as you login into your account with a different locale, the system will prompt whether you wish to switch the names from one language to another. This is available through the xdg-user-dirs-gtk application.
Another issue is with users who use the command line quite often; switching between two languages (for those languages that use a script other than latin) tends to become cumbersome, especially if you have not setup your shell for intelligent completion. In addition, when you connect remotely using SSH, you may not be able to type in the local language at the initial computer which would make work very annoying.
Furthermore, there have been reports with KDE applications not working; if someone can bug report it and post the link it would be great. The impression I got was that some installations of KDE did not read off the filesystem in UTF-8 but in a legacy 8-bit encoding. This requires further investigation.
Moreover, OpenOffice.org requires some integration work to follow the xdg-user-dirs standard; apparently it has its own option as to which folder it will save into any newly created files. I believe this will be resolved in the near future.
Now, if we just installed Ubuntu 7.10 or Fedora 8, and we got, by default, localised subfolders in our home directory (which we may not prefer), what can we do to revert to non-localised folders?
The lazy way is to logout, choose an English locale as the default locale for the system and log in. You will be presented with the xdg-user-dirs-gtk migration tool (shown above) that will give you the option to switch to English folder names for those personal folders.
Clarification: It is implied for this workaround (logout and login thing), you then log out again, set the language to the localised one (i.e. Greek) and log in. This time, when the system asks to rename the personal folders, you simply answer no, and you end up with a localised desktop but personal folders in English. Mission really accomplished.
If you are of the tinkering type, the files to change manually are
$ cat ~/.config/user-dirs.locale
el_GR
$
and
$ cat ~/.config/user-dirs.dirs
# This file is written by xdg-user-dirs-update
# If you want to change or add directories, just edit the line you're
# interested in. All local changes will be retained on the next run
# Format is XDG_xxx_DIR="$HOME/yyy", where yyy is a shell-escaped
# homedir-relative path, or XDG_xxx_DIR="/yyy", where /yyy is an
# absolute path. No other format is supported.
#
XDG_DESKTOP_DIR="$HOME/Επιφάνεια εργασίας"
XDG_DOWNLOAD_DIR="$HOME/Επιφάνεια εργασίας"
XDG_TEMPLATES_DIR="$HOME/Πρότυπα"
XDG_PUBLICSHARE_DIR="$HOME/δημόσιο"
XDG_DOCUMENTS_DIR="$HOME/Έγγραφα"
XDG_MUSIC_DIR="$HOME/Μουσική"
XDG_PICTURES_DIR="$HOME/Εικόνες"
XDG_VIDEOS_DIR="$HOME/Βίντεο"
Personally I believe that having localised names appear under the home folder is good for the majority of users, as they will be able to match what is shown in Locations with the actual names on the filesystem.
There will be cases that software has to be updated and bugs fixed (such as in backup tools). As we proceed with more advanced internationalisation/localisation support in Linux, it is desirable to follow forward, and fix problematic software.
However, if enough popular support arises with clear arguments (am referring to Greek-speaking users and a current discussion) for default folder names in the English languages, we could follow the popular demand.
Also see the relevant blog post New Dirs in Gutsy: Documents, Music, Pictures, Blah, Blah by Moving to Freedom.
Ubuntu Answers…
Free and open-source software offers many challenging tasks for you to undertake. One of them is to answer questions that newbies ask.
Offering support to newbies is challenging for several reasons:
- the problem may not have been described reasonably well
- you need to figure out the least amount of extra information you need, and ask easy questions to the user to fill in the blanks
- you have to take control of the direction of solution and make sure the user follows your steps correctly
- you have to put up with the occasional demanding user
Ubuntu offers a system that users can ask questions and have volunteers answer them. It is called Ubuntu Answers. Unlike forums, here you log in to your launchpad.net account and simply write your question. You start off with a question title, and when you click Next, you are shown with potential answers from previous questions asked and are similar to yours. Really nice.
In order to motivate people to contribute, Launchpad assigns points for every answer you give, and more points for any answer that was marked that solved the problem. This is the karma value of your Launchpad account. There is a list of top contributors for different Launchpad services.
Here are some direct links
- Current list of questions (Open, Answered, Solved, etc). You can filter on the Open questions only, and start answering.
- You can follow the list of questions you are involved in from your Answers URL, as in https://answers.launchpad.net/~simosx
- You are a new user and by some reason you receive every single question/answer sent. Quite too many users get stuck in this. You need to reset the settings at https://answers.launchpad.net/ubuntu/+answer-contact
- To view the solved questions, visit https://answers.launchpad.net/ubuntu and filter to view only Solved questions. It is good experience to see how questions are solved.
A tip to users asking questions: it is good etiquette to respond to the answers that are given to you. There are cases that a question is answered but not acknowledged that it actually solved the problem. Due to this, the solution does not appear when a someone else asks a new question.
What I recommend is to try out Ubuntu Answers. Either ask a question or help with answering questions. It is a good experience.
Update on planet.ellak.gr
Planet EL/LAK (πλανήτης) is a blog aggregator of Greek-speaking users that work on free and open-source software. Though the users speak Greek, it is OK to write in English as well.
We started in 2004 at http://xnum.sourceforge.net/PlanetHellas/ and quickly realised we had to move somewhere else. We enjoyed hosting at hellug.gr and in February 2007 we moved to the current location, planet.ellak.gr.
In the free and open-source communities, the purpose of a planet is to provide a common location where one can read what the people behind the community are doing, thinking, and so on.
In planet.ellak.gr we use the venus variation of the Planet software. Quite shortly, venus will become the official Planet software.
The planet's feed is being managed by Feedburner. When you access http://planet.ellak.gr/rss20.xml, you get a normalised feed from Feedburner.
The last three blogs added are
- Blog of Δημήτρης Τυπάλδος
- New blog of Athanasios Lefteris
- MyDrupal.gr Greek Drupal Community, (welcome to planet!)
We use Google Coop as a means to search the websites and blogs that are shown here. At the top-right of the planet you can see the special search box. If you read something interesting on the planet at some point in time, you can search it through this search box.
Our latest stats for August show that 50% of our visitors use free and open-source software.
Mozilla Firefox has a 80% lead and is the most popular browser. IE is down at 11% and the rest is distributed to many open-source browsers and also accesses from mobile devices.
The vast majority of the visitors (84%) come directly here (either bookmark, or just typing planet.ellak.gr or they just disabled referrers). 8% comes from search engines and the last 8% come from friendly websites (top referrers include www.ellak.gr and BizWriter (Greek). Top keywords are greek, ubuntu and cyprus.
We maintain this planet in an open fashion; see the Planet-ELLAK Google Group, for past discussions, and information on getting your blog/community listed on planet.ellak.gr.
Cannot write Greek Polytonic in Linux
For up to date instructions for Greek and Greek Polytonic see How to type Greek, Greek Polytonic in Linux.
The following text is kept for historical purposes. Greek and Greek Polytonic now works in Linux, using the default Greek layout.
General Update: If you have Ubuntu 8.10, Fedora 10 or a similarly new distribution, then Greek Polytonic works out-of-the-box. Simply select the Greek Polytonic layout. For more information, see the recent Greek Polytonic post.
Update 3rd May 2008: If you have Ubuntu 8.04 (probably applies to other recent Linux distributions as well), you simply need to add GTK_IM_MODULE=xim to /etc/environment. Start a Terminal (Applications/Accessories/Terminal) and type the commands (the first command makes a backup copy of the configuration file, and the second opens the configuration file with administrative priviliges, so that you can edit and save):
$ gksudo cp /etc/environment /etc/environment.ORIGINAL
$ gksudo gedit /etc/environment
then append
GTK_IM_MODULE=xim
save, and restart your computer. It should work now. Try to test with the standard Text editor, found in Accessories.
In Ubuntu 8.10 (autumn 2008), it should work out of the box, just by enabling the Greek Polytonic layout.
Update 20th June 2008: If still some accents/breathings/aspirations do not work, then this is probably related to your system locale (whether it is Greek or not). It works better when it is Greek. If you are affected and you do not use the Greek locale, there is one more thing to do.
$ gksudo cp /usr/share/X11/locale/en_US.UTF-8/Compose /usr/share/X11/locale/en_US.UTF-8/Compose.ORIGINAL
$ gksudo cp /usr/share/X11/locale/el_GR.UTF-8/Compose /usr/share/X11/locale/en_US.UTF-8/Compose
The first command makes a backup copy of your original en_US Compose file (assuming you run an English locale; if in doubt, read /usr/share/X11/locale/locale.dir). The second command copies the Greek compose file over the English one. You then logout and login again.
End of updates
To write Greek Polytonic in Linux, a special file is used, which is called the compose file. There is a bit of complication here in the sense that the compose file depends on the current system locale.
To find out which compose file is active on your system, have a look at
/usr/share/X11/locale/compose.dir
Let's assume your system locale is en_US.UTF-8 (Start Applications/Accessories/Terminal and type locale).
In the compose.dir file it says
en_US.UTF-8/Compose: en_US.UTF-8
Note that the locale is the second field. If you have a different system locale, match on the second field. Many people make a mistake here. Actually, I think be faster for the system to locate the entry if the compose.dir file was sorted by locale.
Therefore, the compose file is
/usr/share/X11/locale/en_US.UTF-8/Compose
So, what's the problem then?
Well, for the Greek locale (el_GR.UTF-8) we have a different compose file, a compose file in which Greek Polytonic actually works
.
Therefore, there are numerous workarounds here to get Greek Polytonic working.
For example,
- If you speak modern Greek, you can install the Greek locale.
- You can edit /usr/share/X11/locale/compose.dir so that for your locale, the compose file is the Greek one, /usr/share/X11/locale/el_GR.UTF-8/Compose.
- You can edit the Greek compose file, take the Greek Polytonic section and update the Greek Polytonic section of en_US.UTF-8/Compose.
- You can copy the Greek compose file in your home directory under the name .XCompose. I did not try this one, and also you may be affected by this bug. (not tested)
Of course the proper solution is to update en_US.UTF-8/Compose with the updated Greek Polytonic compose sequences. There is a tendency to add the compose sequences of all languages to en_US.UTF-8/Compose, and this actually is happening now. In this respect, it would make sense to rename en_US.UTF-8/Compose into something like general/Compose.
OOXML voting process and controversy
By the end of this month, the ITC 1/SC 34 Technical Committee (ISO) will be voting on whether to accept or not OOXML as an ISO standard.
The voting countries (Participating countries) are
In addition, the following countries have observer status (Observer countries),
The observer countries, though the cannot vote, they can submit comments.
The current stage that OOXML is at, is 40.20, which means is the period that leads to the voting whether to accept or not as an ISO standard.
This proposed document format is controversial because an existing document format exists, the OpenDocument document format, ISO/IEC 26300, Open Document Format for Office Applications (OpenDocument) v1.0, since 2006.
OOXML is a controversial document format. Read more on this regarding OOXML.
In addition, see the Technical White Paper on OpenDocument and OOXML by the ODF Alliance UK Action Group. Another whitepaper, ODF/OOXML technical white paper by Edward Macnaghten.
Open Malaysia is also valuable resource (includes blog contributions relating to open standards). For example, in spreadsheets in OOXML one cannot write dates before the 1st March 1900!
Finally, Achieving Openness: A Closer Look at ODF and OOXML by Sam Hiser.
Update #1: Microsoft is Outmuscling OOXML Opposition in Spain
Update #2: It is important to vote NO rather than abstain. It is sad that Spain decided to abstain rather than voting NO. UPDATE: Spain is an observer, thus cannot cast a vote. Somewhat lost en la traduccion.
Update #3: Czech comments on OOXML.
Important MO file optimisation for en_* locales, and partly others
During GUADEC, Tomas Frydrych gave a talk on exmap-console, a cut-down version of exmap that can work well on mobile devices.
During the presentation, Tomas showed how to use the tool to find the culprits in memory (ab)use on the GNOME desktop. One issue that came up was that the MO files taking up space though the desktop showed English. Why would the MO translation files loaded in memory be so big in size?
gtk20.mo : VM 61440 B, M 61440 B, S 61440 B atk10.mo : VM 8192 B, M 8192 B, S 8192 B libgnome-2.0.mo : VM 28672 B, M 24576 B, S 24576 B glib20.mo : VM 20480 B, M 16384 B, S 16384 B gtk20-properties.mo : VM 128 KB, M 116 KB, S 116 KB launchpad-integration.mo : VM 4096 B, M 4096 B, S 4096 B
A translation file looks like
msgid "File"
msgstr ""
When translated to Greek it is
msgid "File"
msgstr "Αρχείο"
In the English UK translation it would be
msgid "File"
msgstr "File"
This actually is not necessary because if you leave those messags untranslated, the system will use the original messages that are embedded in the executable file.
However, for the purposes of the English UK, English Canadian, etc teams, it makes sense to copy the same messages in the translated field because it would be an indication that the message was examined by the translation. Any new messages would appear as untranslated and the same process would continue.
Now, the problem is that the gettext tools are not smart enough when they compile such translation files; they replicate without need those messages occupying space in the generated MO file.
Apart from the English variants, this issue is also present in other languages when the message looks like
msgid "GConf"
msgstr "GConf"
Here, it does not make much sense to translate the message in the locale language. However, the generated MO file contains now more than 10 bytes (5+5) , plus some space for the index.
Therefore, what's the solution for this issue?
One solution is to add to msgattrib the option to preprocess a PO file and remove those unneeded copies. Here is a patch,
--- src.ORIGINAL/msgattrib.c 2007-07-18 17:17:08.000000000 +0100
+++ src/msgattrib.c 2007-07-23 01:20:35.000000000 +0100
@@ -61,7 +61,8 @@
REMOVE_FUZZY = 1 << 2,
REMOVE_NONFUZZY = 1 << 3,
REMOVE_OBSOLETE = 1 << 4,
- REMOVE_NONOBSOLETE = 1 << 5
+ REMOVE_NONOBSOLETE = 1 << 5,
+ REMOVE_COPIED = 1 << 6
};
static int to_remove;
@@ -90,6 +91,7 @@
{ "help", no_argument, NULL, 'h' },
{ "ignore-file", required_argument, NULL, CHAR_MAX + 15 },
{ "indent", no_argument, NULL, 'i' },
+ { "no-copied", no_argument, NULL, CHAR_MAX + 19 },
{ "no-escape", no_argument, NULL, 'e' },
{ "no-fuzzy", no_argument, NULL, CHAR_MAX + 3 },
{ "no-location", no_argument, &line_comment, 0 },
@@ -314,6 +316,10 @@
to_change |= REMOVE_PREV;
break;
+ case CHAR_MAX + 19: /* --no-copied */
+ to_remove |= REMOVE_COPIED;
+ break;
+
default:
usage (EXIT_FAILURE);
/* NOTREACHED */
@@ -436,6 +442,8 @@
--no-obsolete remove obsolete #~ messages\n"));
printf (_("\
--only-obsolete keep obsolete #~ messages\n"));
+ printf (_("\
+ --no-copied remove copied messages\n"));
printf ("\n");
printf (_("\
Attribute manipulation:\n"));
@@ -536,6 +544,21 @@
: to_remove & REMOVE_NONOBSOLETE))
return false;
+ if (to_remove & REMOVE_COPIED)
+ {
+ if (!strcmp(mp->msgid, mp->msgstr) && strlen(mp->msgstr)+1 >= mp->msgstr_len)
+ {
+ return false;
+ }
+ else if ( strlen(mp->msgstr)+1 < mp->msgstr_len )
+ {
+ if ( !strcmp(mp->msgstr + strlen(mp->msgstr)+1, mp->msgid_plural) )
+ {
+ return false;
+ }
+ }
+ }
+
return true;
}
However, if we only change msgattrib, we would need to adapt the build system for all packages.
Apparently, it would make sense to change the default behaviour of msgfmt, the program that compiles PO files into MO files.
An e-mail was sent to the email address for the development team of gettext regarding the issue. The development team does not appear to have a Bugzilla to record these issues. If you know of an alternative contact point, please notify me.
Update #1 (23Jul07): As an indication of the file size savings, the en_GB locale on Ubuntu in the installation CD occupies about 424KB where in practice it should have been 48KB.
A full installation of Ubuntu with some basic KDE packages (only for the basic libraries, i.e. KBabel - (ls k* | wc -l = 499)) occupies about 26MB of space just for the translation files. When optimising in the MO files, the translation files occupy only 7MB. This is quite important because when someone installs for example the en_CA locale, all en_?? locales are added.
The reason why the reduction is more has to do with the message types that KDE uses. For example,
msgid ""
"_: Unknown State\n"
"Unknown"
msgstr "Unknown"
I cannot see a portable way to code the gettext-tools so that they understand that the above message can be easily omitted. For the above reduction to 7MB, KDE applications (k*) occupy 3.6MB. The non-KDE applications include GNOME, XFCE and GNU traditional tools. The biggest culprits in KDE are kstars (386KB) and kgeography (345KB).
Update #2 (23Jul07): (Thanks Deniz for the comment below on gweather!) The po-locations translations (gnome-applets/gweather) of all languages are combined together to generate a big XML file that can be found at usr/share/gnome-applets/gweather/Locations.xml (~15MB).
This file is not kept in memory while the gweather applet is running.
However, the file is parsed when the user opens the properties dialog to change the location.
I would say that the main problem here is the file size (15.8MB) that can be easily reduced when stripping copied messages. This file is included in any Linux distribution, whatever the locale.
The po-locations directory currently occupies 107MB and when copied messages are eliminated it occupies 78MB (a difference of 30MB). The generated XML file is in any case smaller (15.8MB without optimisation) because it does not include repeatedly the msgid lines for each language.
I regenerated the Locations.xml file with the optimised PO files and the resulting file is 7.6MB. This is a good reduction in file space and also in packaging size.
Update #3 (25Jul07): Posted a patch for gettext-tools/msgattrib.c. Sent an e-mail to the kde-i18n-doc mailing list and got good response and a valid argument for the proposed changes. Specifically, there is a case when one gives custom values to the LANGUAGE variable. This happens when someone uses the LANGUAGE variable with a value such as "es:fr" which means show me messages in Spanish and if something is untranslated show me in French. If a message has msgid==msgstr for Spanish but not for French, then it would show in French if we go along with the proposed optimisation.

