A semantic grid is an approach to grid computing in which information, computing resources and services are described using the semantic data model.
In this model, the data and metadata are expressed through facts (small sentences), becoming directly understandable for humans.
This makes it easier for resources to be discovered and combined automatically to create virtual organizations (VOs).
Like the Semantic Web, the semantic grid can be defined as "an extension of the current grid in which information and services are given well-defined meaning, better enabling computers and people to work in cooperation.
"[1] This notion of the semantic grid was first articulated in the context of e-Science, observing that such an approach is necessary to achieve a high degree of easy-to-use and seamless automation, enabling flexible collaborations and computations on a global scale.