Six Challenges for the Semantic Web(语义网的6大挑战)

The availability of content（内容的实用性） . Currently, there is little Semantic Web content available. Existing web content should be migrated to Semantic Web content including static HTML pages, but also dynamic content, multimedia and web services. 

 Ontology availability, development and evolution（本体的实用、开发与演变）. Ontologies will become a key piece, as they allow expliciting the semantics of Semantic Web content. A big effort must be made in the creation of common widely used ontologies for the Semantic Web, on the provision of adequate infrastructure for ontology development, change management and mapping, and, in this distributed web environment, on the adequate control of the evolution of ontologies and the annotations referring to them.  

Scalability （可测量性）. A significant effort must be made to organize Semantic Web content, store it and provide the necessary mechanisms to find it. All these tasks must be performed and coordinated in a scalable manner, as these solutions should be prepared for the huge growth of the Semantic Web. 

Multilinguality （多语言）. This problem already exists in the current Web, and should also be tackled in the Semantic Web. Any Semantic Web approach should provide facilities to access information in several languages, allowing the creation and access to SW content independently of the native language of content providers and users.  

Visualization（可见性） . Intuitive visualization of Semantic Web content will become more and more important to solve the increasing amount of information overload, as users will demand the easy recognition of relevant content for their purposes. New techniques must be explored that differ from the usual hypertext structure visualization of the current web.  

Stability of Semantic Web languages（语义网语言的稳定性） . Finally, standardization efforts have already been performed in this area, which have recently provided as a result the W3C recommendations of RDF Schema and OWL. And new standardization efforts are being currently performed for the provision of rule-based support on top of these languages.