This document describes the set of use cases for batch job scheduling of scientific/technical applications, also broadly
 referred to as the core high performance computing (HPC) use case.  A simple base case is defined that we expect to 
have universally implemented by all batch job scheduling clients and schedulers. Additional "Common Cases" are 
enumerated, which are anticipated to be applicable to at least two but not all batch job scheduling clients and 
schedulers. This Base Case and Common Cases will be used as a set of requirements for the forthcoming GGF proposed 
recommendation entitled "OGSA™ HPC Profile". This document is a product of the OGSA HPC Profile WG of the Global Grid 
Forum.