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Unverified50% confidenceFactExact time

RDF 于 2004 年成为 W3C 推荐标准，以主语-谓语-宾语三元组形式描述资源关系

1

Sources

50%

Confidence

Long-term

Relevance

7/22/2026

First Seen

Sources

微软开源Ontology Playground：可视化学本体论的免费工具

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