The Design And Implementation Of STEP Product Information Sematic Converter Based On OWL

With the development of computer technology and Internet technology,the trends of enterprise integration of manufacturing are more obvious. The traditional way of expressing and processing product information model has been unable to adapt to the needs of modern enterprise. Product information exchange and sharing is no longer limited to the content and format, but on the level of knowledge. The research on the grid computing, semantic web and semantic grid makes product information exchange and sharing on a higher level. This thesis is based on the project which is named The Research And Application On Product Semantic Information Sharing and Exchange Under Semantic Grid Environment.This work studies the design and implementation of the Converter for STEP product Semantic information based on OWL, develops a two-way converter which can be used in the translating between STEP Part21 according to AP203 and OWL. The goal of this thesis is to solve the problems which exist in the STEP product semantic data sharing and exchange under network environment.The main work of this thesis is as follows:⑴We introduced some research on product semantic data sharing and exchange.⑵We introduced the STEP and the concepts of Semantic Web, which can provide theoretical basis to building conversion rule between OWL and STEP and the implementation of the converter.⑶We gave the conversion rule between STEP and OWL, and described the mapping method about Data types, entities, functions, rules and so on; we discussed how to use SWRL or MathML to describe function and rule. In this thesis, we also gave the mapping method from AP203 to OWL.⑷We discussed the design and implementation of the STEP product sematic converter based on OWL, which includes the EXPRESS analyzer (accomplish the analysis of the EXPRESS schema and the establishment of the Ontology Base), the Preprocessor (accomplish the conversion from STEP AP203 file to OWL file), the Postprocessor(accomplish the conversion from OWL file to STEP AP203 file).⑸In order to verify the converter's accuracy and consistency on STEP product sematic information sharing under Internet, CAD software SolidWorks was used to help establish a gear model.we exported the AP203 file from SolidWorks, and used our converter to accomplish the conversion.The result proved our converter is accurate and consistent.