Feb 2009 -- Due to time pressures, the ongoing development of 'rope' has been suspended temporarily.

ROPE Language Reference - "tolower"

The "tolower" action takes a single string from the stack and converts every uppercase character that it contains to lower case.

For example:

lift(4) tolower "http" eq assert

the script lifts four bytes from the packet and checks that they are equal to the string "http", but ignoring the case of the original.