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