Annotation schema editor obsolete

http://gate.ac.uk/sale/tao/index.html#x1-1180006.4.1

"6.4.1 Annotation Schemas"
"...a component is available
(gate.gui.SchemaAnnotationEditor)..."

But in the CREOLE plugin manager it looks like that is in
the Obsolete 
group.  How then does one know what types exist (string?
text?), and how 
to define annotations?