Simple
feature
grid or raster
  Service
database (feature service)
datastore (generic feature service)
grid coverage exchange (generic raster service)
memory (generated or temporary content)
repository (catalog service)
  Server
generic server
web feature server (open web services feature server)
web map server (open web services rendering service)
web registry service (open web services catalog service)
  File
file (feature file)
file (grid file)
  Misc
world used in logo
!
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