TEI certainty DTD fragment
確信度モジュール．
controls the inclusion, in the DTD, of element and attribute
declarations for certainty.
確信度向けの要素宣言と属性宣言を，DTDに埋め込む制御を行う．
To include elements and attributes for certainty in the
DTD, the user should declare this entity with a value of INCLUDE;
this will override the default.