A button that is rendered as an HTML input element with the type attribute set to submit, reset, or
image, depending on the <apex:commandButton> tag’s specified values. The button executes an
action defined by a controller, and then either refreshes the current page, or navigates to a
different page based on the PageReference variable that is returned by the action.

An <apex:commandButton> component must always be a child of an <apex:form> component.
See also: <apex:commandLink>

A Flash movie, rendered with the HTML object and embed tags.

An ordered or unordered list of values that is defined by iterating over a set of data. The body of
the <apex:dataList> component specifies how a single item should appear in the list. The data set
can include up to 1,000 items.

All messages that were generated for all components on the current page. If an <apex:message>
or <apex:messages> component is not included in a page, most warning and error messages are
only shown in the debug log.

A template component that provides content for an <apex:insert> component defined in a
Visualforce template page.
See also: <apex:composition>, <apex:insert>