Info-apropos-nodes

Info-apropos-nodes is a variable defined in `info.el'.
Its value is

nil

Documentation:
Alist of cached apropos matched nodes.
Each element is (NODENAME STRING MATCHES) where
NODENAME is the name of the node that holds the search result,
STRING is the search string given as an argument to `info-apropos',
MATCHES is a list of index matches found by `Info-apropos-matches'.