Like computers, KOS are only valuable when applied by some human
actor. As with computers themselves, the SemanticWeb holds out the
possibility that a KOS can accomplish much with limited human input
Time lags affect KOS use in multiple ways.We know that individual
searches generally involve multiple interactions with a KOS over a period of
time: the benefit to the user may occur some time after the initial query. And
most users interact with a particular KOS for multiple queries and become
more adept with practice. As noted above, the ubiquity of KOS does not
prevent alternative search strategies from occurring with some frequency.