From: Eric Russell <emr1776@...>
Date: 2009-12-18T22:47:42+09:00
Subject: Re: grep a block

try:

#!/usr/bin/ruby

filename = ARGV[0]


File.open(filename).each do |line|
   if line =~  /<mms:MmsCcppAccept>/..line =~  /<\/mms:MmsCcppAccept>/
      puts line
   end
end

Is this what you're looking for?