(1) (Open Publication Structure) An open standard for electronic books and Web publishing from the International Digital Publishing Forum (www.idpf.org). Introduced in 2007 as the successor to the Open eBook format, OPS publications are marked up in XHTML or Digital Talking Book (DTBook) and reside in an Open Container Format (OCF). The OCF is a zipped archive with an .epub extension that contains the marked up publication, related images and an Open Packaging Format (OPF) file that provides an index to all the files in the OCF. See Open eBook.

(2) (Open Profiling Standard) A specification for sharing data and ensuring privacy of a user's data. The OPS provides a standard way of identifying which data can be transferred from the user to a Web site and how it can and cannot be used. See ICE.