Parcels, units and spatial identifiers
Parcels and units organise digital space. Their identifiers and geometries must survive changes in rendering without being confused with legal title.



Why separate identity from geometry
A unit may change its 3D mesh, texture, rendering scale or visual organisation without necessarily ceasing to be the same legal object. A persistent identifier allows cadastral versions to be linked to legal history without making property depend on a specific graphics file.
Persistent identity
The cadastral object remains identifiable even if the server, interface naming or visual representation changes.
Versions
Boundaries and coordinates may require correction or updating; every relevant change must be traceable.
Zoning and function
Rules of use are normative or administrative information distinct from ownership.
Registry link
The cadastral unit may be the reference object for a right, but it does not create that right merely by existing.
The unit remains the same even when the drawing changes
Persistent key for locating the same object over time.
Versioned form and coordinates; geometric change must be traceable.
Spatial and functional metadata without turning description into title.
A separate legal layer, linked to the identifier and a valid legal basis.