associative model
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Topic Maps is a standard for the representation and interchange of knowledge, with an emphasis on the findability of information.
Topic Maps
Associative model of data
The associative model of data is an alternative data model for database systems. Other data models, such as the relational model and the object data model, are record-based.This undirected cyclic graph can be described by the list {a,b}, {a,c}, {b,c}. In graph theory and computer science , an adjacency list representation of a graph is a collection of unordered lists, one for each vertex in the graph.
Adjacency list