UCS漢字の統合基準

ISO/IEC 10646:2003（以下UCS）規格書の附属書S（「CJK 統合漢字の統合及び配列の手順」）には、各国・各地域の漢字を統合する際に標準化委員会が定めた指針が記述されています。しかし、規格の利用者が漢字図形を符号化する際の指針は記述されていません。 ここでは、現在のUCS規格ではどのような字形のパターンが統合されているかを分析することで、ユーザが文字を入力する際の「統合・包摂規準」およびその例外について明確化を図ります。

UCS Calligraphic Variations

Annex S of ISO/IEC 10646:2003 (UCS) describes the basic principles of Unification on CJK Unified Ideographs. However, it does not describe the detailed criteria for end-users to encode their documents in CJK Unified Ideographs.

In this section, unifiable calligraphic patterns of UCS ideographs are analized and described.

点画の方向の相違

Differences in rotated strokes/dots

入りの左右

Differences in stroke initiation direction

開きが上か，下か

Differences in open direction of two strokes

はらうか，止めるか

Differences in throwing away at the stroke termination

点か，線か

Differences of stroke or dot

点画が出る・出ない（抜ける・抜けない）

Differences in intersection and extension of two strokes or dots

抜けるか，抜けないか

Differences in intersection at the stroke initiation and/or termination

付くか，付かないか

Differences in contact of strokes

交わるか

Differences in crossing of strokes

接触位置の差

Differences in contact point of two strokes

部分字形・点画が付く・付かない

Differences in contact of strokes

左右につなげるか，断つか

Differences in horizontal connectivity

つなげるか断つか，又は交わる角度

Differences in connectivity and angle of intersection

つなげるか，2点か

Differences of two dots or single stroke

つなげるか，別画か

Differences of single stroke or two separate strokes

画線の出方の相違

Differences in protrusion at the folded corner of strokes

画線の折れ曲がり方の相違

Differences in bent strokes

ハネの有無

Differences in folding back at the stroke termination

起筆の筆押さえの有無

Differences in accent at the stroke initiation

屋根の有無

Differences in 'rooftop' modification

抽象字形の違い

Differences of abstract shape

点・画の増減

Differences of extra or reduced stroke or dot

分離して1画とするかどうか

Differences of single stroke or separated two strokes

相対的な長さ

Differences in relative length of strokes

類型の統合

Unification of similar shapes

筆法の簡化の違い

Differences on callifgraphic simplification