groff_rfc1345(7) — Linux manual page

Name | Description | Files | Authors | See also | COLOPHON

groff_rfc1345(7)    Miscellaneous Information Manual    groff_rfc1345(7)

Name         top

       groff_rfc1345 - special character names from RFC 1345 and Vim
       digraphs

Description         top

       The file rfc1345.tmac defines special character escape sequences
       for groff(7) based on the glyph mnemonics specified in RFC 1345
       and the digraph table of the text editor Vim.  Each escape
       translates to a Unicode code point, and will render correctly if
       the underlying font is a Unicode font that covers the code point.

       For example, “\[Rx]” is the “recipe” or “prescription take”
       symbol, and maps to the code point U+211E.  groff lets you write
       it as “\[u211E]”, but “\[Rx]” is more mnemonic.

       For a list of the glyph names provided, please see the file
       rfc1345.tmac, which contains definitions of the form
              .char \[Rx] \[u211E]    \" PRESCRIPTION TAKE
       where .char's first argument defines a groff special character
       escape sequence with a mnemonic glyph name, its second argument
       is a special character escape sequence based on the code point,
       and the comment describes the glyph defined.

       The RFC 1345 glyph names cover a wide range of Unicode code
       points, including supplemental Latin, Greek, Cyrillic, Hebrew,
       Arabic, Hiragana, Katakana, and Bopomofo letters, punctuation,
       math notation, currency symbols, industrial and entertainment
       icons, and box-drawing symbols.

       The Vim digraph table is practically a subset of RFC 1345 (being
       limited to two-character mnemonics), but, as a newer system, adds
       four new mnemonics not specified in the RFC (the horizontal
       ellipsis, the Euro sign, and two mappings for the rouble sign).
       These have also been added to rfc1345.tmac.

       rfc1345.tmac contains a total of 1,696 glyph names.  It is not an
       error to load rfc1345.tmac if your font does not have all the
       glyphs, as long as it contains the glyphs that you actually use
       in your document.

       The RFC 1345 mnemonics are not identical in every case to the
       mappings for special character glyph names that are built in to
       groff; for example, “\[<<]” means the “much less than” sign
       (U+226A) when rfc1345.tmac is not loaded and this special
       character is not otherwise defined by a document or macro
       package.  rfc1345.tmac redefines “\[<<]” to the “left-pointing
       double angle quotation mark” (U+00AB).  See groff_char(7) for the
       full list of predefined special character escapes.

   Usage
       Load the rfc1345.tmac file.  This can be done by either adding
       “.mso rfc1345.tmac” to your document before the first use of any
       of the glyph names the macro file defines, or by using the
       troff(1) option “-m rfc1345” from the shell.

   Bugs
       As the groff Texinfo manual notes, “[o]nly the current font is
       checked for ligatures and kerns; neither special fonts nor
       entities defined with the char request (and its siblings) are
       taken into account.”  Many of the characters defined in
       rfc1345.tmac are accented Latin letters, and will be affected by
       this deficiency, producing subpar typography 
       ⟨https://savannah.gnu.org/bugs/?59932⟩.

Files         top

       /usr/local/share/groff/1.23.0/tmac/rfc1345.tmac
              implements the character mappings.

Authors         top

       rfc1345.tmac was contributed by Dorai Sitaram
       ⟨ds26gte@yahoo.com⟩.

See also         top

       RFC 1345 ⟨https://tools.ietf.org/html/rfc1345⟩, by Keld Simonsen,
       June 1992.

       The Vim digraph table can be listed using the vim(1) command
       “:help digraph-table”.

       groff_char(7)

COLOPHON         top

       This page is part of the groff (GNU troff) project.  Information
       about the project can be found at 
       ⟨http://www.gnu.org/software/groff/⟩.  If you have a bug report
       for this manual page, see ⟨http://www.gnu.org/software/groff/⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://git.savannah.gnu.org/git/groff.git⟩ on 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-08-23.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

groff 1.23.0.rc1.654-4e1db-dir1t9yAugust 2021             groff_rfc1345(7)

Pages that refer to this page: groff_tmac(5)groff_char(7)