This is because of dramatic changes in the HWP file format and changes with the Microsoft product line. There is a great deal of inconsistency as to whether Microsoft products can open HWP files. Microsoft Word 2007 and later, the binary file format was replaced as the default format by the Office Open XML format, though Microsoft Word can still produce DOC files. This includes the common use of text and graphics, along with formatting functions.ĭOC is a filename extension for word processing documents, most commonly in the proprietary Microsoft Word Binary File Format. The HWP word processing system is a typical document and contains many of the same functions as many other systems. It is a popular word processing system within Korea but isn't used as much outside of the country. This word processing system can save documents that are written in Hangul. Hangul is the alphabet used in the Korean language. Hanword was previously known as Hangul Word Processor. The full name of the HWP file extension is a Hanword Document.