Errata Notice:
  Hi, First, thanks for buying and reading the book, here is a list
  of the problems I've discovered so far. I'm not sure exactly what 
  process this file needs to go through to get from me to you, so I
  will keep an up to date version at:
  preinheimer.com/prowebapis/errata.txt
  
  If you find any problems/bugs/mistakes not listed here please let
  me know at: paul@preinheimer.com 
  
  I'm well aware that there are copies of the book floating around
  the net in .pdf or windows help format, if you came to this file
  after reading one of those, and found my book helpful please 
  consider purchasing a copy, I worked hard on the book so you 
  wouldn't have to work quite so hard working on APIs.
  
  Chapter 3
  Page 23
  "Chapter 5 discuesses how you go about building your own feed, ..."
  should read
  "Chapter 4 discuesses how you go about building your own feed, ..."
  
  Page 41
  Dashes are missing in the chart at the top, it should read:
  The contents define a character class, [0-9] will match any digit from zero to nine, [a-zA-Z0-9] would match any single lower case letter, upper case letter, or digit. [a-zA-Z0-9] would match any number of them. 
  
  Chapter 4
  Page 61
  1Caching 
          Should read (1 should not be there)
  Caching
  
  Chapter 5
  Page 108
  $request\; =\; createRequest(\text{'}123\text{'},\; \text{'}search\text{'},\; \text{'}book\text{'},\text{'}style);\; Should\; read\; (closing\; quote\; for\; style\; was\; ommited)$request = createRequest('123', 'search', 'book','style');
  
  Chapter 12
  *SECURITY ISSUE*
  The demonstrated REST API framework is vulnerable to XSS attacks
  since it displays un-escaped data when a call is made with an
  unknown paramater. Corrected code (simply applying htmlentities())
  appears in the apropriate code file.