PVLDB is a scholarly journal for short and timely research papers with a journal-style reviewing and quality-assurance process. PVLDB is owned by the VLDB Endowment and publicized by the ACM Digital Library. PVLDB allows continuous submissions throughout the year. In addition to being accepted or rejected, submissions may also have revisions requested and invited for further review. Regardless of the submission type, all accepted papers are uniformly published in the next available issue of PVLDB and will be offered a presentation slot at the next available VLDB conference. Accepted papers will be published in PVLDB only.