Cluster Cluster A cluster is a subset of the complete network, a group of nodes and links which share a common concept and may be seen as an aggregate. For example, take this study. Some systems have mechanisms for making clusters explicit. This is an important requirement of any sophisticated hypertext system.
Links imply strong relationships while clusters allow for looser conglomerates.
Typed links may be used to indicate clusters, but this method usually becomes unwieldy. Writers such as Halasz have noted the need for a useful implementation.