Grid technologies allow sharing of heterogeneous resources spreaded on the Internet or a Wide Area Network. The infrastructure determined by the use of these technologies (grid computing) is only a part of a wider scenario, which also includes information management and knowledge processing support of distributed processes. This wider view is adopted by the Semantic Grid [6] which is defined as an extension of Grid Computing where the information and services are described in a well-defined form, allowing people and computers to work in a more cooperative way. In this paper, the recent proposes in the ontologies management for grid resource semantic description are analized, which facilitate the location of resources when applications need it, and explore the possibilities of development of modules which make use of knowledge bases. In this way, it is possible to extend existing grid architectures with the aim of making the task of web resource discovery more efficient and compose this resources in an intelligent way.