Research concerning the classification and modelling of rights, restrictions, and responsibilities related to real property based on a systems approach within the domain of land registration and cadastre commenced with the Core Cadastral Domain Model (CCDM) initiative in 2002. That model has been renamed the Land Administration Domain Model (LADM), having at its core a conceptual model of the relationship of persons (natural, non-natural or group) to registered objects through rights, restrictions, and responsibilities. This basic relationship is assumed to be applicable to land registration and cadastral systems throughout the world. In fact, LADM has gathered support from such international organizations as OGC, ISO/TC211, UN-Habitat and EU-Inspire.1 It is being discussed within the International Standards Organization (ISO) as Working Draft 19152 with a view to issuing a new international standard.2The research leading to the original CCDM has been published through a series of papers concerning different modelling aspects, cumulating in two articles. One generic3 and one on the proposed implementation of the Portuguese Cadastre.4 This first implementation exercise, as well as a current (operational) implementation to the Icelandic Cadastre,5 both focused specially on the cadastral component (specifically, geometry and spatial topology of surveying and mapping objects, especially parcels).