element..." and ends with "...not considered valid": "You can, however, use a recurrence operator to allow such an element to appear more than once. Let's talk about that now."

XML Pocket Reference
by Robert Eckstein


The following change was made in the 2/00 reprint:


(26)
  Added the following to end of the paragraph under "Multiple Elements"
  that begins "This DTD states that either a <title> element..." and ends
  with "...not considered valid":

      "You can, however, use a recurrence operator to allow such an
      element to appear more than once. Let's talk about that now."