Scientists working on eScience environments use workflows
to carry out their experiments. Since the workflows
evolve as the research itself evolves, these workflows are
a good tool to track the evolution of the research. Scientists
can trace their research and associated results through
time or even go back in time to a previous stage and fork
to a new branch of research. In this paper we introduce
the workflow evolution framework (EVF), which is implemented
in the Trident workflow workbench[5]. The primary
contributions of the EVF include i) management of knowledge
associated with workflow evolution and ii) enabling
reproducible research. Since we believe evolution can be
used for workflow attribution, our framework will encourage
researchers to share their workflows and get the credit
for their contributions.