Where is the visualization documentation?

[Sutikshan Dubey]

Hi,
Google Visualizatoin charts are fabulous and I am enjoying using them. However as a starter I do have one silly question-
in link below:-
http://code.google.com/apis/chart/interactive/docs/reference.html#DataTable_setProperty
it is written that "...see the visualization documentation to see what properties are supported.".
Can someone please tell me where is the visualization documentation?

Thanks.