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Approved April 14, 2003, amended March 15, 2005
(For context, here is the entire (older) Self-Plagiarism policy as of April 14, 2003.)
Self-plagiarism is when an author reuses portions of his or her previous writings in subsequent research papers. It is important that TODS have a very clear policy on this. In fact, TODS is in pretty good shape already.
There are several points that should be emphasized, but aren't.
We don't want to overload either the AE or the reviewers with additional expectations that they do a thorough search for self-plagiarism. The benefit doesn't seem to outweigh the cost.
The following paragraph has been added to the acknowledgment letter sent to the corresponding author.
The following policy should replace that in the public web page on Information for Authors.
Prior Publication Policy
The technical contributions appearing in ACM journals are normally original papers that have not been published elsewhere.
A submission based on one or more papers that appeared elsewhere must have major value-added extensions over what appeared previously. For conference papers, there is little scientific merit in simply sending the submitted version to a journal after the paper has been accepted for the conference. The scientific community gains little from this.
Widely disseminated refereed conference proceedings, in addition to journal papers, are considered publications, but technical reports and CORR articles (neither of which are peer reviewed) are not. All overlapping papers appearing in workshop proceedings and newsletters should be brought to the editor's attention; they may be considered publications if they are peer reviewed and widely disseminated.
A submitted manuscript that is based on one or more previous publications by one or more of the authors should have at least 30% new material. The new material should be content material: For example, it should not just be straightforward proofs or performance figures that do not offer substantial, new insights. The submitted manuscript affords an opportunity to present additional results, for example by considering new alternatives or by delving into some of the issues listed in the previous publication(s) as future work. At the same time, it is not required that the submitted manuscript contain all of the material from the published paper(s). To the contrary: only enough material need be included from the published paper to set the context and render the new material comprehensible.
This requirement concerns any paper by any author of the TODS submission that overlaps significantly with the TODS submission and: (a) is in submission, (b) has been accepted for publication, or (c) has been published at the time of submission. An overlap is significant when it exceeds a page of the TODS submission or when the overlap concerns content material in the TODS submission, regardless of length.
Note that the novelty requirement applies to papers in categories (a)-(c).
The likely outcome of a failure to comply with this Prior Publication Policy is rejection. In particular, the editor, at her or his discretion, may choose immediately to reject a submission when an overlapping paper is discovered about which the corresponding author did not adhere to the requirements stated above.