Unofficial filetype wiki opensBy Chris Williams. Published: 23rd Sep 2004, 14:22:50 | Permalink | Printable
Get stuck inAn unofficial list of filetypes has been published by Michael Borcherds, in the form of a wiki. This means the list of publically known RISC OS filetypes can be viewed and edited by anyone, which spreads the burden of keeping the list up to date.
Files stored on RISC OS filesystems have their 'type' stored as a number along with other information about the file. The type number corresponds to the nature of the information stored in the file, such as, if the file is plain text, or is a specific format of image file, and so on. RISC OS and RISC OS software convert these values into words that users can remember. For example, "Drawfile" is easier to remember than the value 2815 (or 0xAFF in hexadecimal).
Before an application can output a file of a given type, it must have the type number allocated to it from the official RISC OS filetype database. This is independently maintained by Alan Glover at Pineapple software, and the current list of allocated filetypes is kept confidential so that file types allocated to a particular software developer cannot be seen by rival competitors. Once software is released and made public, then any newly allocated filetypes can be added to the unofficial list for all to see.
"It also still needs a lot of tidying up by someone with a reasonable knowledge of HTML, but it's a start. I've added a filetypes 1B7, 1B8, F77, F7A, F7B and updated the information at the start", Michael admitted to drobe.co.uk, regarding his new wiki based list.
"Denis Howe has put a link to it on his version so I guess he doesn't think it's a totally ridiculous idea."
Michael was motivated to create the new unofficial list after he himself recently had two filetypes allocated.
Unofficial filetype wiki
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