Changes in HTML 5 - <object> Tag

What's new in HTML 5

Differences between HTML 5 and earlier versions of HTML

The <object> tag is not allowed in the head section.

The following attributes should not be coded on the <object> tag because they either have been deprecated or were never officially supported:

• align
• archive
• border
• classid
• codebase
• codetype
• declare
• hspace
• standby
• vspace

The 2000-2010 Recommendations from the W3C HTML Working Group defined the HTML namespace for the object element type name along with the names of all HTML element types. In older (pre-2000) versions of HTML, element type names were not associated with a namespace.