关键词: 农作物种质资源, 元数据, 本体, 语义元数据

Abstract: With further strengthening of national crop germplasm resources service platform, integration and sharing between platform data and other related data resources have become an urgent problem to be solved. This paper proposed a method named semantic metadata combining metadata and two-level ontology to implement system integration. Firstly, crop germplasm resources global ontology was established, then metadata in distributed database were extracted and centralized to one metabase in accordance with uniform standards. Meanwhile, each local ontology was established according to different data source. Finally, mapping was done between global ontology and metadata base, also between each local ontology and its data source, so as to form semantic metadata. Crop germplasm resources integrated framework was constructed, and integrated system was implemented. The experimental results showed that semantic metadata method could solve the problem both in semantic description and semantic data heterogeneity, and can ultimately achieve system integration. The local ontology makes query more intelligent, complete and precise, thus to improve service quality.

Key words: crop germplasm resources, metadata, ontology, semantic metadata