http://www.bea.com/servers/portal/weblogic-portal/8.0

elements
book-content
book-extension
book-insertion-point
book-location
desktop-extension
look-and-feel-content
page-content
page-extension
page-insertion-point
page-location
parent-label-location
parent-meta-location
portal-file
portlet-content
provider-info
provider-info.author
provider-info.description
provider-info.last-modified
provider-info.support-url
provider-info.title
provider-info.version
weblogic-portal-extension