The text file you create with the /converttoctx command line option has a defined syntax. When the text file is created, the file begins with <>. Tokens, except for "(" and ")" should be delimited by whitespace.
Special notations used in the BNF Description include:
<non-terminals> are displayeds in italic type and enclosed with angle brackets
Terminals are displayed in bold face type. Terminals are case insensitive. Terminals consisting of a single character are enclosed in quotation marks.
<alternative> | <items> are separated by a vertical bar
[<optional-items>] are displayed in square brackets.
<repetitive-items>}* are displayed in curly brackets. An asterisk (*) following the brackets indicates the item may appear 0 or more times. A plus sign (+) following the brackets indicates the item may appear 1 or more times.