1. A non-transitory computer readable medium including therein a data structure, which is a Cognitive Signature, comprising: a field to identify a contraction level of a plurality of contraction levels of a network; a field entry for a Globally Unique Identity Designation (GUID); a field T of an ordered list of first vectors, each first vector corresponding to the contraction level of the network; a field G of a list of second vectors, each second vector corresponding to the contraction level of the network; a field F to contain a Bloom Filter as a binary vector comprised of values of each of the first vectors in field T and the second vectors in field G, the binary vector being computed based on a first threshold vector corresponding to field T and a second threshold vector corresponding to field G; a field to contain a set of symbols S that label the network; a field for a Discrete Unlabeled Network Representation Code (DUNRC); a field for a Discrete Colored Network Representation Code (DCNRC); a field for contraction tree operator expressions to identify whether the network was contracted by a contraction rule; and a field for a pointer to a next Cognitive Signature at an incremented level of contraction.