IndoorGML is an OGC Standard.
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The overall structure of the Multilayered Space Model constitutes a multilayered graph, where all the nodes
from all n layers are included but are separated into n partitions which are connected by the inter-space connections.
Furthermore the graph also contains the state transition edges (intra-space connections)
Denotin the interspace connections between the SpaceLayer
<SpaceLayer>s represent various space concepts such as topography, sensor, security, etc. A SpaceLayer aggregates <State> and <Transition> which are directly associated with the corresponding geometry classes.
Within the dual graph structure of one layer a node in dual space represents a space (e.g. a room within a building) in primal space
Within the dual graph structure of one layer, an edge in dual space represents the adjacencies or connections (e.g. doors or passages as intra-space connections)
Within the dual graph structure of one layer a node in dual space represents a space (e.g. a room within a building) in primal space
Within the dual graph structure of one layer a edge in dual space represents a spaceboundary (e.g. a wall between adjacenced rooms in a building) in primal space