Two of its creators, Chuck Geschke and John Warnock, left Xerox, formed Adobe Systems, and produced a similar language called PostScript.
Interpress describes the desired or ideal appearance of a document that has been completely composed by some other process (emitter).
Interpress is so extensive, some printer manufacturers may prefer to support only a part of it, perhaps to reduce development time and cost or to improve performance.
Recognizing this and also the potential for chaos if every printer were to implement a different portion of the language, Interpress was designed to have defined three standard function sets:[2] This feature set allows the ability to instruct the printer which media to use (paper size, type, color), number of copies, sides printed on as well as finishing actions such as stapling.
Nested Blocks {BEGIN..END} allow for constructing large documents out of smaller ones.