We have used the JSDL spec v1.0 in the UniGrids project and it works fine for us. We have built job description 
documents compliant with the JSDL spec 1.0 and submitted them to the Unicore grid middleware. 
The JSDL spec allows to describe a job in a clean way.

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Claudio Cacciari - c.cacciari@cineca.it
High Performance Computing Department
CINECA - http://www.cineca.it