AFIS-ALKIS-ATKIS model
The AFIS-ALKIS-ATKIS model ( AAA model ) is the conceptual application scheme for the geographic information systems AFIS , ALKIS and ATKIS , which have been redesigned by the Working Group of the Surveying Administrations of the Federal Republic of Germany (AdV) since 1996.
The application schema was created in the modeling language Unified Modeling Language (UML). It gives the conceptual view of the applications to be modeled. The modeling corresponds to the so-called 3-schema theory, which in a data processing application distinguishes between the conceptual view and the internal view (modeling of the implementation) and the external view (modeling of the data exchange interface).
The AAA model does not describe the internal view (i.e. questions of implementation), but instead primarily represents the conceptual view. The external view is also specified, but this is no longer done in UML, but through a general description of rules that represent the conceptual UML model in XML schema descriptions for the exchange files (as an application of GML and XML ).
The conceptual model is divided into the following sub-schemes:
- a scheme for the ISO standards used (e.g. ISO 19107 , ISO 19109 ),
- a basic scheme common to all applications,
- the AFIS-ALKIS-ATKIS technical schema.
- There are also additional UML schemes for the operations of the standard-based exchange interface
- and the structural definition of a large number of output products.
The latter serve as a structural (UML class diagram) specification for the XML schemas of the various output products as an XML file.
- In version 5.1, additions to the OpenGIS Web Service (OWS) Common Specification of the Open Geospatial Consortium (OGC) have been added.
- In version 6.0, the standards-based exchange interface is updated to GML 3.2 / ISO 19136 and ISO 19139 .