Modeling of incremental information of topographic database based on OEM
Huaji Zhu · Journal of Liaoning Technical University · 2006
The distribution of the incremental information of topographic database is still one of the main open challenges for many topographic data producers.The incremental information is the data delta between the old version and new version of the same database.The incremental information is characterized by rather complex structures.These structures may be irregular(i.e.they do not necessarily conform to a fixed schema).Hence,the representation of incremental information in traditional data models,such as the relational or object-oriented,is not always feasible.In this respect,this paper investigates the use of semi-structured data(SSD)models for modeling incremental information.A framework for the representation of incremental information in OEM(Object Exchange Model),a popular model for semi-structured data is introduced.Additionally,it is shown how to map the OEM representation of incremental information to XML(eXtensible Markup Language)description.A simplified case study in the application domain of the distribution of topographical data is examined closely.