Redefine Implied author from Cognitive schema

Cognitive schema as an important concept of Post classical narratology,could be divided into world schema,text schema and language schema.Cognitive schema theory could interpret the text from cognitive perspective.Implied author could be redefined from the Cognitive schema:Implied author must contain world schema of text space-time and receivers' space-time at the same time,and contain text schema and language schema the interpretative communities could share with.This definition could clarify the ambiguity of Wayne Booth's definition,and explain the current changes of Implied author.