Drobe :: The archives
About Drobe | Contact | RSS | Twitter | Tech docs | Downloads | BBC Micro

Unofficial filetype wiki opens

By Chris Williams. Published: 23rd Sep 2004, 14:22:50 | Permalink | Printable

Get stuck in

A RISC OS filetype iconAn 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

Previous: Castle, RISCOS Ltd. talks continue
Next: ArtWorks 2.3 slated for Guildford show release


Viewing threaded comments | View comments unthreaded, listed by date | Skip to the end

How does one get to correct information on the filetype Wiki? I was assigned filetype 1B7 for ArmBob by Alan Glover on 11/03/2004, but the list shows something else. Also 18D is assigned to Weave, TaskLua no longer existing. When I tried to register an account with seedwiki I found that clicking the 'Go' button had no effect (using Oregano2).

 is a RISC OS UserGavinWraith on 23/9/04 3:59PM
[ Reply | Permalink | Report ]

Hmm, that's annoying - I see FAA allocated to Utl-something. I've been using FAA & FAB for Smalltalk stuff since before RISC OS was publically released. I thought it was official since I was told to use it... foo. (Hey, does anyone have &F00 ?)

 is a RISC OS Userrowledge on 23/9/04 5:32PM
[ Reply | Permalink | Report ]

Gavin: Woud you like to email Alan? I'll email him too - I haven't released my program with filetype 1B7 yet, fortunately, so I expect you won't have to change anything :)

I picked the Wiki site pretty much at random... if anyone knows of a RISC OS browser friendly site (Drobe?!?), feel free to move it.

 is a RISC OS Usermurkle on 23/9/04 9:35PM
[ Reply | Permalink | Report ]

I've received a (speedy) reply from Alan: I've now got 1B8 (VOC) & 1B9 (TZX)


 is a RISC OS Usermurkle on 24/9/04 7:35AM
[ Reply | Permalink | Report ]

 is a RISC OS Userjmb on 1/10/04 7:21PM
[ Reply | Permalink | Report ]

To re-emphasise the comments above - this Wiki is unofficial, unsupported and not authoritative. I'll check out the question about FAA/B when I get back from my Xmas break. Since it's hosted as a Wiki that could be edited by anyone it can't be authoritative by definition.

When I get a chance I'll go through the Wiki and let Michael know which entries are wrong and should be removed - that's as much as I can do within the policy of non-disclosure that operates for the filetypes list (because at any given time there will be entries on it for products that have not yet been publically announced).

If you have questions about entries on the Wiki relating to your own registrations send me email at allocate at chorazin dot org Please note that my replies will be limited by the policy above - I can indicate whether an entry on the Wiki is correct or not, but in the event that the Wiki is wrong I will not indicate what it should be unless I'm in conversation with the registrant of that filetype.


 is a RISC OS Userchorazin on 26/12/04 12:51PM
[ Reply | Permalink | Report ]

Please login before posting a comment. Use the form on the right to do so or create a free account.

Search the archives

Today's featured article

  • Drobe price comparison chart
    Checking out the competition
     21 comments, latest by govind on 14/11/03 2:15PM. Published: 9 Nov 2003

  • Random article

  • A blast from the past
    A new book chronicles the popularity of early computer games such as Space Invaders and Frogger
     Discuss this. Published: 24 Sep 2001

  • Useful links

    News and media:

    Top developers:
    RISCOS LtdRISC OS OpenMW SoftwareR-CompAdvantage SixVirtualAcorn

    CJE MicrosAPDLCastlea4X-AmpleLiquid SiliconWebmonster


    RISCOS.org.ukRISCOS.orgRISCOS.infoFilebaseChris Why's Acorn/RISC OS collectionNetSurf

    Non-RISC OS:
    The RegisterThe InquirerApple InsiderBBC NewsSky NewsGoogle Newsxkcddiodesign

    © 1999-2009 The Drobe Team. Some rights reserved, click here for more information
    Powered by MiniDrobeCMS, based on J4U | Statistics
    "Have I been nominated on drobe.co.uk this year? Sadly not."
    Page generated in 0.0877 seconds.