The Knowledge Bank provides support for as many file formats as possible. Over time, items stored in the Knowledge Bank will be preserved as is, using a combination of time-honored techniques for data management and best practices for digital preservation.
The proprietary nature of many file types makes it impossible to guarantee preservation. Put simply, our policy for file formats is that:
- everything put in the Knowledge Bank will be retrievable
- we will recognize as many files' formats as possible
- we will support as many known file formats as possible.
When a file format is uploaded to the Knowledge Bank, we assign it one of the following categories:
- "supported": the Knowledge Bank fully support the format. "Support" means "make usable in the future, using whatever combination of techniques (such as migration, emulation, etc.) is appropriate given the context of need". For supported formats, the Knowledge Bank might choose to bulk-transform files from a current format version to a future one, for instance. The Knowledge Bank staff can't predict which services will be necessary down the road, so formats and techniques to ensure that needs are accommodated as they arise are continually monitored.
- "known": the Knowledge Bank can recognize the format, but cannot guarantee full support.
- "unsupported": the Knowledge Bank cannot recognized a format; such formats are listed as "application/octet-stream", or "Unknown".
The Knowledge Bank attempts to keep the percentage of supported format materials as high as possible. Communities are encouraged to contact the Knowledge Bank with questions or concerns. Knowledge Bank Format Collection: In the following table, MIME type is the Multipurpose Internet Mail Extensions (MIME) type identifier; for more information on MIME, see the MIME RFCs or the MIME FAQ. Description is what most people use as the name for the format. Extensions are typical file name extensions (the part after the dot, e.g. the extension for "index.html" is "html"). These are not case-sensitive in the Knowledge Bank, so either "sample.XML" or "sample.xml" will be recognized as XML. In addition, the Knowledge Bank does not archive compressed files, such as .gz or .zip.
|application/octet-stream||Unknown||(anything not listed)||unsupported|
|application/ogg||OGG Media Type||ogg, OggS||known|
|application/postscript||Postscript||ps, eps, ai||supported|
|application/vnd.ms-project||Microsoft Project||mpp, mpx, mpd||known|
|application/vnd.openxmlformats-officedocument.presentationml.presentation||Microsoft PowerPoint XML||pptx||known|
|application/vnd.openxmlformats-officedocument.spreadsheetml.sheet||Microsoft Excel XML||xlsx||known|
|application/vnd.openxmlformats-officedocument.wordprocessingml.document||Microsoft Word XML||docx||known|
|audio/x-aiff||AIFF||aiff, aif, aifc||supported|
|audio/x-mpeg||MPEG Audio||mpa, abs, mpeg, mp3||known|
|text/richtext||Rich Text Format||rtf||supported|
|video/mpeg||MPEG||mpeg, mpg, mpe||known|
|video/quicktime||Video Quicktime||mov, qt||known|