Apparatus and method for preparing data

The invention relates to a device and a method for preparing data of a relational database by means of R2RML to form and/or assign data blocks of a graph database to data blocks of the graph database. "R2RML" represents "RDB to RDF mapping language" where "RDB" represents "relational database" and "RDF" is an abbreviation of "Resource Description Framework". According to the invention, an implementation of at least one R2RML unit and optionally further R2RML units is proposed in which the quality of the R2RML mapping file is identified and improved, an optimization of the process and energy efficiency of the R2RML mapping can be initiated, and the R2RML mapping is also visualized optionally after the quality improvement and/or after the optimization of the R2RML method. 本发明涉及一种用于借助于R2RML来准备关系数据库的数据以形成图数据库的数据块和/或将其分配到图数据库的数据块的装置和方法。"R2RML"代表"RDB到RDF映射语言"，其中"RDB"代表"关系数据库"，并且"RDF"是"资源描述框架"的缩写。根据本发明，提出了至少一个R2RML单元以及必要时还有其它R2RML单元的实现，其中，识别和改善R2RML映射文件的质量，可以启动对R2RML映射的过程和能效的优化，而且必要时也在质量改善之后和/或在优化R2RML方法之后使R2RML映射可视