########################################################
# A001ͷ	                                       #
########################################################
#                   
#version   4     X   #
head_systemId  2     X   #ϵͳʶ
head_encoding  2     X   #ı
head_protocol  2     X   #ͨѶЭ
head_corpCode  20    X   #ҵֱ׼
head_dataBodyLen 10  N   #ձĳ
head_tradeCode 6     X   #
head_operator  5     X   #Ա
head_mode      2     X   #
head_tradeDate 8     X   #
head_tradeTime 6     X   #ʱ
head_reqSn     20    X   #ϵͳˮ
head_errCode   6     X   #
head_errMsg    100   X   # 
head_toContinue  1   X   #־
head_packetNo  3     X   # 
head_signTag   1     X   #ǩʶ:0-ǩ, 1-ǩ 
head_signFormat  1   X   #ǩݰʽ
head_signAlgorithm 12  X #ǩ㷨 
head_signDataLen 10  N   #ǩݳ
head_attachNum 1     N   #Ŀ 