I have a paper written that is about 17 pages. I plan to submit a shortened version of it of only the main ideas to a conference with a 10 page limit next month, but I also want to submit the full manuscript for review to IEEE Transactions on Information Theory in parallel. I was reading their FAQ and I read the following paragraph which really confused me:
Policy on prior publication
Contributions should comprise novel and previously unpublished material; however, prior publication at (or parallel submission to) conferences does not preclude publication in this Transactions, provided this is properly referenced in the paper at the time of submission to the Transactions. Thereafter, submission to other journals is precluded, unless the paper is rejected by this Transactions, or is withdrawn. If all or part of the paper was previously presented at one or more conferences, a statement such as the following must be included in the authors' footnote on the first page of the paper at the time of submission: "This paper was presented [in part] at ... [and ...]."
If authors submit a paper that is a nearly verbatim copy of a prior conference publication, they have to indicate to the editors in a cover letter why they feel that republication is warranted. Editorial decisions will take into account any previous publication of submitted material.
Here is what's confusing me. At first, they say that its okay to have parallel submission as long as this is referenced in the paper. Then they say but we have to indicate this to the editors with a cover letter. I am confused, is what I am doing okay or not?