This figure shows how the Portal parallel page engine metrics are organized, in a tree fashion. The top level is Witness, on the left, below this, shown to the right in the figure, are the following metric tables:
"PageEngine", with ResponseCodes as a child,
"page", with URL as a child
"web", with Provider* as a child, and Portlet* as a child of Provider*
"plsql", with Provider* as a child, and Portlet* as a child of Provider*
"login", with URL* as a child
"version", with URL* as a child
"XSL", with URL* as a child