Page 88 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2018 Vol. 42

XIA Cuijuan, LIU Wei, CHEN Tao & ZHANG Lei / A genealogy data services platform implemented with linked data technologies 087

to describe the association between these entities. I listed in detail the correspondence between
genealogical metadata and genealogical ontology in my article A Genealogical Ontology in the
Form of BIBFRAME Model
The data of The General Catalog of Chinese Genealogies are stored in Excel tables and the
collected genealogy data are stored in SQL Server in the form of MARC. Both of the data can
be taken as the RDB data format of “Record-Field-Field Value”. Thus, the data format needs
to be transformed from RDB to RDF, the process of which is called RDB2RDF. There are two
open source conversion tools that can be applied to accomplish RDB2RDF process: one is
“DB2Triples” that supports W3C RDB2RDP standard and the other is “OpenRefine”. Both of the
two tools support the creation of the mapping between the tables & fields in RDB and the classes
& properties in genealogical ontology, define the generated standard of URI, and automatically

The Data in Excel Sheets

Definition of Ontology Mapping

RDF Data in Turtle Format
Figure 2. The mapping and conversion from RDB to RDF.