从RDF(S)到OWL,什么在改变之中?  

From RDF(S) to OWL,What Makes the Difference?

作　　者：张智雄[1] 

机构地区：[1]中国科学院文献情报中心,北京100080

出　　处：《图书馆杂志》2005年第1期54-59,14,共7页Library Journal

摘　　要：作为一种 Ontology 描述语言,需要具有丰富的语义表达能力、精确的语义表述性能和有效的可计算性。鉴于 RDFS 语义表达能力的有限,OWL 借鉴了 DAML,OIL 和 DAML+OIL 的经验,在 RDFS 的基础之上,通过增加语言构成要素,扩充了 RDFS 的语义表达能力,并且提高了语义表述的精确性,然而随之而来的是计算复杂性和推理难度的增加,有效可计算性的降低。描述逻辑的存在为 OWL 语言的设计打下了重要的基础,使 OWL 能够在表达能力和可计算性之间找到平衡。As a Web Ontology Language,OWL needs increased expressive power,precisely defined semantics and efficiently computational ability.Based on DAML,OIL and DAML + OIL,OWL intro- duces new language constructors,can represent more knowledge than RDF(S)can do.OWL makes great progress in expressive power,but increased expressive power inevitably means increased computational complexity for reasoning problems.A suitable balance between the computational requirements and the expressive requirements is needed.Description Logic plays a very important role in resolving this prob- lem.By carefully choosing language constructors and axioms,especially dividing the OWL into three species language that have different constructors,the designers of the language seem to find the trade- off.

关 键 词：RDFS OWL 可计算性 DAML+OIL 描述逻辑 描述语言 计算复杂性 语义表达 语言构成 精确 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]