A photonics industry (field is physics/electrical engineering) conference has the following submission guideline:
Note: Only original material should be submitted. Commercial papers, papers with no new research/development content, and papers with proprietary restrictions will not be accepted for presentation.
The only other conference I have been to, there was no distinction between presenting unpublished or (recently) published material. I have not yet published results on my current project, but does it break this rule if I publish between abstract submission (due August) and the conference (in January)? If I don't publish before the conference, is it redundant if I try to submit these results to a proper journal after the conference?
Thank you for the help.