Abstract: Job management has been a hot issue in grid technology. The job description is the first task in the job management. This paper analyzes the job description, designs the job description language(CJDL) based on task communication. CJDL based on the XML language, with scalability, its advantages is that it can describe the communication between tasks and demands on resources. It can accomplish the automatic parallelization of job and resource matching further, and lay a foundation for job spawn and running and so on.

Key words: job description language, grid, parallelization, XML, task communication