classes

Here are the data structures with brief descriptions:

boolean	HTML single checkbox input type
color	HTML color input type
container	Container element base class
creditcard	Default creditcard fieldset
date	HTML date input type
datetime	HTML datetime input type
datetimelocal	HTML datetime-local input type
duplicateElementNameException	Thrown when there are duplicate element names
element	Behold: the über-class
elementException	Parent for element specific exceptions
elementParametersNoArrayException	Thrown when element parameters aren't of type array on construction
email	Default validator for email input elements
email	HTML email input type
fieldset	Holds HTML-fieldset specific attributes and methods
file	HTML file input type
hidden	HTML hidden input type
html	Can be used to insert custom HTML between rendered HTML elements
htmldom	DOMDocument for html-content
htmlform	Main interface to users
input	Input element base class
invalidElementNameException	Thrown when element name is empty or contains invalid characters
month	HTML month input type
multiple	HTML-multiple-choice input type i.e. checkbox and select
number	Default validator for number input elements
number	HTML number input type
password	HTML password input type
range	Default validator for range input elements
range	HTML range input type
regEx	Customizable validator for input elements
richtext	HTML richtext element
search	HTML search input type
single	HTML-single-choice input type i.e. radio and select
step	Steps break up forms into separate consecutive parts
stepnav	Can be used to insert a step navigation
tel	HTML tel input type
tel	Default validator for tel input elements
text	HTML text input type
textarea	HTML textarea element
time	HTML time input type
unknownElementTypeException	Thrown when attemting to instantiate an inexistent element class
url	Default validator for url input elements
url	HTML url input-type
validator	Parent validator class
week	HTML week input type