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5.2 Filling in the Header Entry

The initial comments "SOME DESCRIPTIVE TITLE", "YEAR" and "FIRST AUTHOR , YEAR" ought to be replaced by sensible information. This can be done in any text editor; if Emacs is used and it switched to PO mode automatically (because it has recognized the file's suffix), you can disable it by typing M-x fundamental-mode.

Modifying the header entry can already be done using PO mode: in Emacs, type M-x po-mode RET and then RET again to start editing the entry. You should fill in the following fields.

Project-Id-Version
This is the name and version of the package.

POT-Creation-Date
This has already been filled in by xgettext.

PO-Revision-Date
You don't need to fill this in. It will be filled by the Emacs PO mode when you save the file.

Last-Translator
Fill in your name and email address (without double quotes).

Language-Team
Fill in the English name of the language, and the email address or homepage URL of the language team you are part of.

Before starting a translation, it is a good idea to get in touch with your translation team, not only to make sure you don't do duplicated work, but also to coordinate difficult linguistic issues.

In the Free Translation Project, each translation team has its own mailing list. The up-to-date list of teams can be found at the Free Translation Project's homepage, http://www.iro.umontreal.ca/contrib/po/HTML/, in the "National teams" area.

Content-Type
Replace `CHARSET' with the character encoding used for your language, in your locale, or UTF-8. This field is needed for correct operation of the msgmerge and msgfmt programs, as well as for users whose locale's character encoding differs from yours (see 10.2.4 How to specify the output character set gettext uses).

You get the character encoding of your locale by running the shell command `locale charmap'. If the result is `C' or `ANSI_X3.4-1968', which is equivalent to `ASCII' (= `US-ASCII'), it means that your locale is not correctly configured. In this case, ask your translation team which charset to use. `ASCII' is not usable for any language except Latin.

Because the PO files must be portable to operating systems with less advanced internationalization facilities, the character encodings that can be used are limited to those supported by both GNU libc and GNU libiconv. These are: ASCII, ISO-8859-1, ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6, ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-8859-13, ISO-8859-14, ISO-8859-15, KOI8-R, KOI8-U, KOI8-T, CP850, CP866, CP874, CP932, CP949, CP950, CP1250, CP1251, CP1252, CP1253, CP1254, CP1255, CP1256, CP1257, GB2312, EUC-JP, EUC-KR, EUC-TW, BIG5, BIG5-HKSCS, GBK, GB18030, SHIFT_JIS, JOHAB, TIS-620, VISCII, GEORGIAN-PS, UTF-8.

In the GNU system, the following encodings are frequently used for the corresponding languages.

When single quote characters or double quote characters are used in translations for your language, and your locale's encoding is one of the ISO-8859-* charsets, it is best if you create your PO files in UTF-8 encoding, instead of your locale's encoding. This is because in UTF-8 the real quote characters can be represented (single quote characters: U+2018, U+2019, double quote characters: U+201C, U+201D), whereas none of ISO-8859-* charsets has them all. Users in UTF-8 locales will see the real quote characters, whereas users in ISO-8859-* locales will see the vertical apostrophe and the vertical double quote instead (because that's what the character set conversion will transliterate them to).

To enter such quote characters under X11, you can change your keyboard mapping using the xmodmap program. The X11 names of the quote characters are "leftsinglequotemark", "rightsinglequotemark", "leftdoublequotemark", "rightdoublequotemark", "singlelowquotemark", "doublelowquotemark".

Note that only recent versions of GNU Emacs support the UTF-8 encoding: Emacs 20 with Mule-UCS, and Emacs 21. As of January 2001, XEmacs doesn't support the UTF-8 encoding.

The character encoding name can be written in either upper or lower case. Usually upper case is preferred.

Content-Transfer-Encoding
Set this to 8bit.

Plural-Forms
This field is optional. It is only needed if the PO file has plural forms. You can find them by searching for the `msgid_plural' keyword. The format of the plural forms field is described in 10.2.5 Additional functions for plural forms.


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