RDF Metadata in XHTML - slide "PICS in HTML: Syntax"

HTML uses <>; PICS uses ()

<!DOCTYPE html ...>
<html lang="en">
<head>
  <meta http-equiv="PICS-Labels"
  content='(PICS-1.1 "http://www.rsac.org/ratingsv01.html" l
     by "martinm@raleigh.ibm.com" on "1996.06.24T10:11-0500"
     exp "1998.06.06T08:00-0500"
     r (n 0 s 0 v 0 l 0))'>
  <meta http-equiv="PICS-Label"
  content='(PICS-1.1 "http://www.classify.org/safesurf/" l
    by "martinm@raleigh.ibm.com"
    on "1996.06.24T15:38-0500"
    exp "1998.06.06T08:00-0500"
    r (SS~~000 1))'>
  <title>...