THEAD

Structure for storing the text header

TLINE

Structure for storing a text line

ITCPO

Control parameter for output formatting

ITCPP

Return parameter from output formatting

ITCED

Control parameter for the text editor

ITCER

Return parameter from the text editor

ITCST

Structure of the result table that gathers all the symbols appearing in a text

ITCWE

Structure of the result table that lists all the elements appearing in a form