a graph of graphs
each node in a metagraph represents an entire graph or a complex substructure within a larger system
edges represent relationships between these component graphs — connections, interactions, dependencies
properties
hierarchical: each level of the metagraph represents a different level of abstraction
composable: subgraphs can be treated as single nodes and analyzed at higher levels
multi-scale: the same system can be viewed at different resolutions
in cyber
cyber/metagraph describes the multi-scale view: cyber/crystal (the seed graph), the cybergraph (on-chain), and the network of cybergraphs
see cyber/crystal for the seed knowledge graph specification
see about this metagraph for the story behind this logseq graph
applications
machine learning: model architectures as graphs of computational subgraphs
network theory: analyze networks of networks
computational biology: metabolic pathways as graphs within cellular graphs
knowledge graph: ontologies that reference and compose other ontologies