Resumen de Extending LADM to support workflows and process models
Saša Vranić, Hrvoje Matijević, Miodrag Roić, Nikola Vučić
In order to be able to guarantee the overall correctness of data, updating of Land administration system’s data must be executed following a formally and technically clearly defined and controllable procedure (process). In general technical sense, correctness of data primarily depends on its consistency. Databases natively support enforcing consistency of transactions over the data but lack the flexibility needed for modelling business processes and do not natively support operating in heterogeneous IT environments (web services, various external and loosely coupled systems). WorkFlow Management Systems (WFMS) with integrated transactional properties provide a technological platform which supports enforcing consistency within heterogeneous IT environments. Within the scope of our previous work and in order to provide a standardised means for modelling of dynamic component of Land Administration Systems (LASs), we developed an extension to LADM for integrating processes into LADM. We propose to extend the LADM with a new class LA_Process, as a sub-class of the existing LADM class LA_Source. Also, LA_Process is associated to descendants of LA_Source (spatial and administrative source) and versioned object. Associating those classes to LA_Process enables executing processes over instances of LADM classes in a versioning supported manner and linked to underlying formal documents. This extension is proposed to be included in the second edition of the LADM which is under development (Lemmen et al., 2019). Within this work we further revise LA_Process in order to broaden its scope and to consider processes on LADM classes outside of the SpatialUnit package. In addition to this proposed extension of the LADM we give an example of hierarchical modelling of LAS-processes. We define topmost two levels of processes with a basic set of activities which are applicable to any LAS. As the granularity of activities increases, processes may become dependent on a particular LAS but the general concepts from topmost level should be followed. We use UML (Unified Modelling Language) Activity Diagrams to model processes in LAS.
