Fig. 1.

Two summarization networks for an excerpt from CIDO: (a) An excerpt of 10 COVID-19 diagnostic process concepts from CIDO. Concepts are represented by boxes with rounded corners and are connected by hierarchical IS-A relationships shown as thin black arrows. Nonhierarchical semantic (lateral) relationships are written in bold inside colored rectangular boxes. The boxes indicate sets of concepts with the same sets of lateral relationship types. Boxes with a different numbers of lateral relationship types have different colors. (b) The area taxonomy summarization network for the excerpt in (a), where the nodes, shown as boxes filled with solid colors, represent areas and the links are the hierarchical child-of relationships (shown as thick black upward arrows) connecting area nodes. Area nodes are color-coded by cardinalities of their sets of lateral relationship types. (c) The partial-area taxonomy summarization network for (a). The nodes are partial-areas represented as white boxes within area nodes. Numbers in () indicate how many concepts are summarized by partial-areas. As in (b), hierarchical child-of links connecting partial-area nodes are displayed as thick upward arrows.