Regular research papers must not exceed 10 pages in ACM Proceedings style. Tool demonstration papers must not exceed 4 pages in ACM Proceedings style, and authors will be expected to present a live demonstration of the described tool at the workshop (tool papers should include an additional appendix of up to 6 additional pages giving the outline, screenshots, examples, etc. to indicate the content of the proposed live demo at the workshop). Authors are strongly encouraged to consult the [[ResearchPaperAdvice][advice for authoring research papers]] and [[ToolPaperAdvice][tool papers]] before submitting. Papers should be submitted electronically via the workshop web site. The workshop proceedings will be published in the [[http://portal.acm.org/dl.cfm][ACM Digital Library]] and selected papers will be invited for a journal special issue dedicated to PEPM'08.