1      Definition

A region of the Universe with Space-Time attributes.

2      Functional Requirements

An U-Location is a portion if the Universe space with the following characteristics:

  1. Has Space-Time attributes.
  2. May cover a limited Space and Time or be unlimited in Time.
  3. Is an element of a hierarchy of U-Locations with a level of the hierarchy L > 0.
  4. It is composed of U-Locations of Level < L.
  5. Need not be continuous, i.e., a Level L U-Location may include space portions completely surrounded by U-Locations with Level < L.
  6. May have Rights attached governing the Process Actions that a Process may perform in the U-Location.
  7. An element of level L of a U-Location hierarchy may inherit only part of the Rights of a level L-1 element of the hierarchy.

A building is an example of U-Location with the following Levels:

  1. The full building has L=3
  2. An apartment has L=2
  3. A room has L=1
  4. A desk has L=0

3      Syntax

https://schemas.mpai.community/MMM4/V2.1/data/ULocation.json

4      Semantics

Label Description
Header M-Location Header
– Standard-ULocation The characters “MMM-ULC-V”
– Version Major version
– Dot-separator The character “.”
– Subversion Minor version
MInstanceID Identifier of M-Instance.
MEnvironmentID Identifier of M-Environment.
ULocationID Identifier of U-Location.
ULocation Set of Data defining U-Location.
– BasicULocations[] Set of Data defining U-Location.
  – BasicULocation A Basic U-Location
  – BasicULocationSpaceTime Spatial Attitude and Time of Basic U-Location.
– Ulocations[] Level L-1 U-Location (L may be 0, i.e., Basic U-Location).
  – ULocation An M-Location
  – ULocationSpaceTime Spatial Attitude and Time of Basic U-Location.
Rights Rights held by or granted to U-Location.
DescrMetadata Descriptive Metadata.