The average of all shortest path lengths between every possible pair of nodes is a common network metric.ĭiameter – the shortest path connecting the two farthest-apart nodes in a network, i.e. A shortest path is the shortest possible route in the network between two nodes. Nodes three steps away from each other in a network have a path length of 3.
path – a series of edges that connects two nodes that do not have a direct edge between them. A network is said to be weighted when all its edges are weighted and unweighted when its edges indicate only the presence or absence of a relationship with no assigned weight. Edge weights are sometimes visualized as the thickness of an edge line. A correspondence where 8 letters were sent might have a weight of 8, while one with only 2 letters would have a smaller weight of 2. Weighted edge – an edge with a value assigned to express the strength of a relationship. A network is said to be undirected when none of its edges are directed. Undirected edges are typically represented as lines without arrows. Friendship is an example of an undirected edge. Undirected edge – an edge that expresses a reciprocal relationship, where exchange flows in either direction. A network is said to be directed when at least one of its edges (and typically all of them) are directed. Directed edges are usually represented as lines with arrows at one end. A single correspondence, which has a sender and a recipient, is an example of a directed edge. directed edge – an edge that expresses a one-sided relationship, or any relationship where an exchange flows in one direction. Attributes can be either numerical (representing sizes, weights, and other measures) or categorical (representing types). attribute – any property of a node or edge. Edges are often represented as lines in network visualizations. 
edge – any relationship, also known as a link or a tie, that connects two nodes.Nodes are often represented as circles in network visualizations. node – any entity included in a network, also known as a vertex or an actor.This list was first compiled for a webinar as part of the Getty Advanced Workshop on Network Analysis and Digital Art History in 2020, but the terms and definitions offered here should be useful to anyone starting out with a humanities network project. Below is a glossary of basic terms used in social network analysis.
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