Ubuntu Manpage: CannaLib_intro — Kana-to-Kanji Conversion Library Intro

Provided by: libcanna1g-dev_3.7p3-12_amd64

NAME

       CannaLib_intro — Kana-to-Kanji Conversion Library Intro

DESCRIPTION

Canna provides the following three libraries:

- High-level libraries

From application programs, high-level libraries are available without considering Kana-
to-Kanji Conversion. Processes such as selecting candidates (including candidate list
display) are executed by the Kana-to-Kanji Conversion system. Only fixed character
strings are passed to the application. If the Kana-to-Kanji Conversion front end is
being used for TTY input, the read (cooked mode) system call in terminal input is
regarded as a high-level library. In this case, scanf, which uses it, is also regarded
as a higo-level library. The Japanese version of Athena Widget (Text Wideget) in the X
Window System is a more typical library that is regarded as a high-level library.

- User interface libraries

Responding to one-character or one-key input, user interface libraries return various
kinds of information. They include the unfixed character string, fixed character
string, marked segment position, status dispaly character string, and candidate list
character string. The libraries at this level do not provide the detailed functions
involving dictionary maintenance or learning control. There is a little remaining room
of divising the display fields although rough lines for Japanese input user interface
are restricted. It is recommended that application interfaces at this level be used
for an application that desires to obtain keys in raw mode in the TTY. Also, it is
recommended that they be used for an application that desires to input and display
graphics and characters in a single window.

- Dictionary access libraries

Dictionary access libraries are used to control dictionary access or candidate
selection directly. Kana-to-Kanji Conversion libraries at this level provide various
function interfaces. They include starting the use of Kana-to-Kanji Conversion system,
converting the reading into Kanji, changing the splitting of sentence-segment, fetching
Next or Previous Candidate, controlling dictionary learning, and maintaining
dictionaries. Dictionary access libraries are used to construct a user interface or
high-level library. It is recommended that they not be used by ordinary users.

Canna provides three header files and three libraries. Their outlines are listed below:

- Header files

X11/kanji.h Used to input or output Japanese data with X.

canna/jrkanji.h Used to input or output TTY-level Japanese data.

canna/RK.h Used to use a dictionary access library.

- Libraries

libXnw Japanese version of Athena Widget Xaw. The application program does
not need to consider Kana-to-Kanji Conversion.

libXn Used to process Japanese data with X. When using XLookupKanjiString
or XDrawKanjiString, you must link this library.

libcanna Kernel for Japanese data input

Library link and header file include must be done as follows, depending on the function
you use:

- Athena Widget

Header file canna/kanji.h

Library libXnw, libXn, libcanna

- XDrawKanjiString

Header file canna/kanji.h

Library libXn

- XLookupKanjiString, XKanjiControl

Header file canna/kanji.h

Library libXn, libcanna

- jrKanjiString, jrKanjiControl

Header file canna/jrkanji.h

Library libcanna

- Dictionary access library

Header file canna/RK.h

Library libcanna

Conversion context

       Canna  enables  you  to  perform  two   or   more   Kana-to-Kanji   Conversion   processes
       simultaneously.  Conversion contextsare used to control management of the respective Kana-
       to-Kanji Conversion processes.  The internal data needed for Kana-to-Kanji  Conversion  is
       secured in each context.

       The  application  identifies  each  conversion  context  by  the context number.  It is an
       integer equal to or larger than 0, and used as the first parameter  of  any  Kana-to-Kanji
       Conversion function.

       Immediately  after  dictionary  access  library  RkInitialize(3) initializes Kana-to-Kanji
       Conversion, there is only the standard context, which has the context number 0.  It can be
       used by any application that uses only one context.

Outline of Successive Segment Conversion:

       Successive Segment Conversion analyzes the specified Hiragana string, and splits it into a
       few elements called sentence segments, or Bunsetsu.   An  example  of  analysis  is  shown
       below:

         ``KANAWOKANJINIHENKANSURU''
         KANAWO        KANAWO(1)     KANAWO(2)
         KANJINI       KANJINI(1)    KANJINI(2)    KANJINI(3)    KANJINI(4)
         HENKANSURU    HENKANSURU(1) HENKANSURU(2) HENKANSURU(3)

       Each  function  provided  by the dictionary access library's Successive Segment Conversion
       may either modify the result of this analysis or  obtain  the  analysis  information.   It
       assumes a two-dimensional candidate address.

       Segment  numbers  0,  1,  ...,  N-1 are assigned leftward to the N segments that have been
       analyzed.  The currently marked candidate is called the current candidate.

       For example, ``KANAWO'' may be specified as  a  candidate  having  Segment  Number  0  and
       Candidate  Number  0.   The  library  instead assumes current segment and candidate in the
       context to simplify the parameters.

NAME

DESCRIPTION

Conversion context

Outline of Successive Segment Conversion:

SEE ALSO