Slashdot Mirror

Andy Tai asks: "Extension languages are designed to be embedded in applications to support customization of the application behavior. Common scripting languages, like Perl and Python, are fairly 'large' with powerful run-time engines and libraries and are widely available and 'script' writers usually assume their stand-alone existences in the deployment environment. However, if one is looking for a language that's small enough so its source can be embedded in the distribution of and built as part of the application, Python and Perl may be 'overweight.' For the real lightweight choices there are Lua and Tinyscheme. Are there others? What are people's preferences and opinions regarding lightweight extension languages?"

taviso writes "In celebration of 'multiple virtual desktop window manager for the X Window system' FVWM's tenth birthday last year, the developers announced a contest to design a new logo for the project. The votes are in, and the winner has been announced. For some time the meaning of the "f" was lost, and 'feline' was one of many suggestions in the FAQ. The original meaning is described in a history of FVWM. FVWM is a remarkable piece of software - if you havnt seen some of the things you can do with it check out some of these screenshots."

j0hnyb1423 writes "Have you ever wanted to be able to connect to that stackless Snort or Hogwash box without walking over to it and plugging in a monitor and keyboard? Well, at last here's your answer - noiptun. Yes, it requires an IP stack to be compiled into the kernel but no IP addresses necessary on the real interface(s). And if stealth IDS setups aren't your bag, then you can at least use it to browse /. without having an IP bound to your linux workstation."

oohp writes "MUTE is a new file sharing network that provides easy search and download functionality while protecting your privacy. It does this by routing all messages through a network of neighbour connections, using virtual addresses and encrypting all the traffic (using RSA for public/private keys and AES for the actual encryption). MUTE's routing mechanism is inspired by ant behaviour. The program is available for Linux, Windows and Mac OS X."

oohp writes "MUTE is a new file sharing network that provides easy search and download functionality while protecting your privacy. It does this by routing all messages through a network of neighbour connections, using virtual addresses and encrypting all the traffic (using RSA for public/private keys and AES for the actual encryption). MUTE's routing mechanism is inspired by ant behaviour. The program is available for Linux, Windows and Mac OS X."

serutan asks: "Recently, a DC++-related mailing list I subscribe to has been buzzing with posts about letters from various ISPs in the U.S., UK, Australia and NZ, warning customers to curtail their download bandwidth usage to an 'acceptable' limit (generally 200 hours/month for three straight months). These are people who thought they signed up for unlimited access. Some of the letters hint that high bandwidth usage may imply illicit activity. All are vague on possible consequences, and nobody has mentioned actually being cut off by an ISP. One guy received an apology after talking to a supervisor about the meaning of the word 'unlimited.' Is this a growing trend? Have you received similar threats from an ISP? What was the outcome?" Of course, would it be so difficult for ISPs to stop advertising "unlimited" access, and instead include in the small (or not-so small) print exactly what the "acceptable" bandwidth usage is? If you did sign up for "unlimited" services and find yourself in this predicament, what have you done to get your bandwidth issues resolved?

frooyo asks: "I have been looking for sometime now to add the functionality of web chat to my website. I have been having difficulty in finding free (open source) software that allows for a moderator and N number of registered users to chat on my website. These projects look promising, but we'd like to know what others are out there. What do you use on your website for web chatting?"

frooyo asks: "I have been looking for sometime now to add the functionality of web chat to my website. I have been having difficulty in finding free (open source) software that allows for a moderator and N number of registered users to chat on my website. These projects look promising, but we'd like to know what others are out there. What do you use on your website for web chatting?"

caseih writes "The LinuxBIOS project has published a paper on using the open source bios code from bochs to help boot unmodified OSes such as Windows 2000, which was presented at the recent Usenix Conference. This was mentioned previously on Slashdot, but this paper gives more technical details on how they did it, some details about future possibilities, and their guiding philosophies behind this project."

TiVo User writes "TiVo has apparently decided to come down on sites that hosted 'image backups,' essentially tarballs of the OS for the machine, which just happens to be Linux. TiVo owners use the images to install on new, larger hard drives (increasing the recording capacity of the unit) or to recover a dead system. Why TiVo has a problem with this, but allows others to sell the same images for profit is beyond me." Read on for the rest of TiVo User's comments. "The images are not used to create pirate TiVos (as a subscription service, TiVo justifiably controls access to their database tightly), so there wouldn't appear to be much harm in allowing them to be hosted. TiVo has always walked a fine line in allowing the user community to mod their units, perhaps they have finally stepped over that line, considering there are free alternatives that are less restrictive. To their credit, the legal mumbo jumbo in their cease letter is non-threatening compared to most other of this type, but it's interesting the letter draws no distinction between the portions of the software that are Linux, and therefore expressly distributable, and those that are proprietary to TiVo."

phutureboy asks: "Between providing hosting for several dozen web sites and consulting for a number of clients who run their own servers, lately I find myself overwhelmed with keeping track of domain expirations. Although the domains which I've personally registered are consolidated under one Register.com account, there are many others spread among multiple registrars, to which I may or may not have administrative access. It would take days or weeks of frustration to audit them all and make sure my clients' contact information is up to date. Does anyone have any tips for dealing with this mess?"

dolo666 writes "The BBC posted an article about how UK legal experts are warning businesses to take a more active role in the prevention of pornographic spam. If you get an explicit email, how exactly do you show it to your boss, without looking guilty yourself?"

dolo666 writes "There is a d20 for sale at Christie's. Titled; "A ROMAN GLASS GAMING DIE", this item dates to circa 2nd Century A.D., and it's likely to go for a mere $6k USD! Just think of the die-hard dice gamer on your list, this festive season! That would make all those late night Cthulhu missions with Lord Nekrull, my 16th level Assassin demi-god, a smashing good time!"

RIMBoy writes "The Atlanta Journal-Constitution recently tracked down the founders behind the dial-up modem revolution. The founders of Hayes Micromodem set the standard with their AT Command set. While Dennis Hayes finds himself inducted into the Computer Industry Hall of Fame, at the same time he is broke (with a stop as a bar owner) and trying to find the next big thing. Dale Heatherington cashed out early and has dedicated himself to several projects, including ham radio."

Ridgelift writes "PDALive's got an article on a port of Frodo, the free Commodore 64 Emulator for your Palm Pilot. I can't wait to get this running so I can play M.U.L.E. on the road!" Update: 12/01 02:41 GMT by T : An anonymous reader writes "I thought I should point out that there's also a really great Atari ST emulator for Palm called 'CaSTaway.' You can find it here. It's free and released under GPL :)"

Hexydes writes "After 3 months of waiting, the first round of screenshots showing off the new GUI for SkyOS 5.0 have been released. The three screenshots show various features of the new GUI, including the new WindUI theme, new Viewer window, and various window effects such as curves, shadows, and transparency. In addition to the new GUI, SkyOS 5.0 will have other additions, such as more support for hardware (just to name one, an ATI driver to go alongside the NVidia driver), speed and stability improvements, anti-aliased text, and Bochs support."

BSDForums writes "The Darwin team is pleased to announce the availability of the Darwin 7.0.1 Installer CD. This is a single Installer CD that will boot and install Darwin on Macintosh computers supported by Mac OS X 10.3, as well as certain x86-based personal computers. The version of Darwin installed by this CD corresponds to the open source core of Mac OS X 10.3. Check out the release notes for more information." dmalloc writes "The Fink team has announced that their binary distribution versioned 0.6.2 is ready for use now. It is a bug-fix release to alleviate issues that came up in 0.6.1. Along with the bug fixes, it introduces an enhanced package manager which is now capable of using the finkmirrors.net-supplied rsync and distfiles mirrors."

An anonymous reader writes " Shortly after Linuxant has released their commercial DriverLoader, Pontus Fuchs has made an NDIS wrapper available under the GPL. Since some vendors refuse to release specifications or even a binary Linux-driver for their Wireless LAN cards he has decided to solve it himself by making a kernel module that can load Microsoft-Windows NDIS drivers. ndiswrapper has been tested with some BroadCom miniPCI cards and it seems to work on some laptops . With some more work it should be possible to support more cards. Hopefully this will be the case for the many owners of Linux laptops based on Intel's Centrino technology. Please contact Pontus if you are interested in helping out!"

Slashback tonight with another notch up for Virginia Tech's Big Mac, another downloadable robot design for the Mini-ITX crowd, updates (both in the negative) regarding two recently speculated-upon business mergers, and more. Read on for the details.

Shooting down those trial balloons. Glitch Tybalt writes with an update to the report that German ISP T-Online might acquire AOL: "This just in from The Register: apparently the buyout wasn't really going to be a buyout, only 70%, and there haven't been any confirmed reports on this. One spokesman for T-Online said '[Such a deal] is more unlikely than likely,'"

On a similar note, gletham writes "A flurry of reports [like this one] over the past day indicated that Nokia was talking with Psion and was seeking to buy the company. This latest piece from Reuters confirms that the topic was merely a rumor and speculation gone rampant. Mind you, with Psion's stock jumping 10% and discussion on Nokia lists and forums quite brisk, you can't help but speculate that Nokia may in fact consider this in the future. The timing is very good, particularly considering Motorola's recent selloff of Symbian ownership. I can't wait to here an official report from Nokia on this one! If all works out, we may even witness a rebirth of the Psion handheld using Series 90!"

Hey, maybe they just hadn't thought of it yet ... wo1verin3 writes "Previously reported was that Fox News Considered Suing Fox's 'The Simpsons' for using a news ticker spoofing the news service. Apparently this was only satire and an apology has been issued.

'Nonetheless, "The Simpsons" (the show, not the characters) issued an apology yesterday: "Matt was being satirical and certainly there was never any issue between the show and Fox News. We regret any confusion.'"

At this rate, it'll be #1 by March! An anonymous reader writes "According to the latest round of leaked information to reach The Register, the Virginia Tech Big Mac has reached 10.28 teraflops. A solid #3 win, 'This places it behind the 5,120 processor Earth Simulator system - 35.9 teraflops - and the 8,160 processor ASCI Q system - 13.8 teraflops.'"

Hold tight, though: Elysdir points to a AP article, pointing out that "the Top 500 list will be officially announced Nov. 18, so it's not clear to me whether the #3 ranking is official or not."

A Droid You Can Build From Downloadable Plans. In this article, LinuxDevices checks out OAP, an open source droid. OAP shares the same VIA Mini-ITX mainboard as the VIA-Roboteq "PC-bot" featured in an earlier Slashdot story, but OAP's project goals seem a little more ambitious. According to the FAQ, OAP will eventually be able to 'Read your favourite news web pages or blogs aloud to you.' A personal droid that reads Slashdot aloud to you -- what more could you ask for?"

(A girlfriend?)

BSD Forums writes "While Unix has roots in document formatting and layout, configuring printers has always required more black-arts arcana. This hasn't been helped by the appearance of low-cost commodity WinPrinters. Fortunately, tools like Ghostscript, gimp-print, and Apsfilter make configuring printers much easier. Michael Lucas demonstrates quick and dirty -- and working -- printer configuration."

An anonymous reader writes "LinuxDevices reports that MontaVista Software has open-sourced several key software components for Linux-based consumer electronics devices. The company says it hopes the contributions will become part of standard Linux and will foster the evolution of Linux as a platform for digital consumer electronics devices. The open source contributions -- and their SourceForge locations -- include: Dynamic Power Management (DPM) to extend battery life and reduce power consumption; High Resolution POSIX Timers to enhance real-time performance; Variable Scheduling Timeouts (VST) to extend the stand-by time of battery powered devices, such as mobile phones; and Protected RAM File System (PRAMFS) to protect data from errant writes. Additionally, MontaVista says it plans to contribute Prioritized Work Queues (PWQ) technology, to enable prioritization and configurability of driver code for enhanced responsiveness."

An anonymous reader writes "LinuxDevices reports that MontaVista Software has open-sourced several key software components for Linux-based consumer electronics devices. The company says it hopes the contributions will become part of standard Linux and will foster the evolution of Linux as a platform for digital consumer electronics devices. The open source contributions -- and their SourceForge locations -- include: Dynamic Power Management (DPM) to extend battery life and reduce power consumption; High Resolution POSIX Timers to enhance real-time performance; Variable Scheduling Timeouts (VST) to extend the stand-by time of battery powered devices, such as mobile phones; and Protected RAM File System (PRAMFS) to protect data from errant writes. Additionally, MontaVista says it plans to contribute Prioritized Work Queues (PWQ) technology, to enable prioritization and configurability of driver code for enhanced responsiveness."

An anonymous reader writes "LinuxDevices reports that MontaVista Software has open-sourced several key software components for Linux-based consumer electronics devices. The company says it hopes the contributions will become part of standard Linux and will foster the evolution of Linux as a platform for digital consumer electronics devices. The open source contributions -- and their SourceForge locations -- include: Dynamic Power Management (DPM) to extend battery life and reduce power consumption; High Resolution POSIX Timers to enhance real-time performance; Variable Scheduling Timeouts (VST) to extend the stand-by time of battery powered devices, such as mobile phones; and Protected RAM File System (PRAMFS) to protect data from errant writes. Additionally, MontaVista says it plans to contribute Prioritized Work Queues (PWQ) technology, to enable prioritization and configurability of driver code for enhanced responsiveness."

An anonymous reader writes "LinuxDevices reports that MontaVista Software has open-sourced several key software components for Linux-based consumer electronics devices. The company says it hopes the contributions will become part of standard Linux and will foster the evolution of Linux as a platform for digital consumer electronics devices. The open source contributions -- and their SourceForge locations -- include: Dynamic Power Management (DPM) to extend battery life and reduce power consumption; High Resolution POSIX Timers to enhance real-time performance; Variable Scheduling Timeouts (VST) to extend the stand-by time of battery powered devices, such as mobile phones; and Protected RAM File System (PRAMFS) to protect data from errant writes. Additionally, MontaVista says it plans to contribute Prioritized Work Queues (PWQ) technology, to enable prioritization and configurability of driver code for enhanced responsiveness."

willum448 writes "The binaries for Fink 0.6.1 have been released, this version will now work under Panther." I wonder if selfupdate-cvs will work for me now? I had circular dependency issues before.

elliotj asks: "In the latest version of their Finder-replacement product, PathFinder CocoaTech has included a terminal feature based on sourcecode from the GPL'd iTerm. They have made available the classes they developed from the iTerm sources, but not all the sourcecode for their product. Since iTerm is GPL (and not LGPL), shouldn't they have to make the ENTIRE codebase available? This is being debated on their forums. If this is true, what can we do to get CocoaTech to open up the rest of the code?"

Saqib Ali asks: "I am looking for for some OpenSource PDF Writers/Creator. I found one, here. It can basically create PDFs out of common software Like OfficeSuite, Visio, Project or any other Windows Application that uses the Windows Printers. I know OpenOffice can also export to PDF. I am working on a project (fat client) where I need to dynamically create PDF reports from data stored in MySQL DB. I know I can use PHP to create PDFs, and also Apache's Cocoon (you can find an example document, here). Of course, I would like to investigate other OpenSource PDF writers as well. Do you know of any other PDF writers, that I can utilize or learn from by looking at the source-code?"

No_Weak_Heart writes "As reported here back in August, October 15th is the day Microsoft set to ban third party clients from logging in to their IM service. This eWeek article notes that the day is upon us, and MS is offering few details about its progress in creating licensing agreements to continue access. The licensing issue was previously discussed here. And my copy of Fire cannot log in. Anyone else find their IM clients non-responsive?"

Gustavo asks: "My company is climbing the CMM ladder and the need for enterprise grade project management tools is growing. Currently we use a mix of MS-Project schedules and Excel spreadsheets, but this doesn't scale when one has a large pool of resources being used on several projects. Moreover, there being Project and Excel files are now scattered all around making it difficult to keep them up-to-date. One option is to go for the MS-Project Server but I was asked to find out if there is something free that we could use instead. Can you help me?"

"What I'm looking for is some web tool in which everyone involved in a project could make changes in their task's status. (Things like number of hours worked and percent completed.) Preferably, all data should be kept in a relational database for easy data gathering and reporting.

MrProject is a nice app but it's Linux only (so far) and doesn't seem to allow for resource sharing among projects.

ToutDoux, another Gnome app, promised much more, but its development stalled a while ago.

I looked at some of the project management tools I found at Freshmeat, like SiteScape, EPIWARE, ITMS, and A.C.E., but none of them satisfied my needs.

MimerDesk is a web-based groupware environment that has a very promising project management tool. It's not complete yet, but it's the best I could find so far.

So, what do your companies use for project management and how is it going?"

canadacow writes "The MT-32 emulation project, which is an offshoot of the DosBox project recently received a cease and desist letter regarding the use of the PCM samples from the synthesizer. Normally this would be an open and shut case, but it just so happens that U.S. Copyright law (specifically 17 U.S.C. section 405) shows that Roland lost their copyright because nowhere did they explicity register it, and registering (or atleast copyright marking) was required before 1989. The MT-32, of course, was produced in 1987. You can find more details at the emulation forum on Vogons" In particular, read through this thread for Canadacow's response to Roland's lawyers, for the type of response that most lawyers probably don't expect from most programmers.

PerlGuru writes "The Xbox-Linux project has posted a submission form, and now some initial results for various Xbox hardware details. The aim of the form is to collect enough information to be able to make a good guess as to the internals of the box before even taking it off the shelf at the store. Being able to predict the hardware is especially nice considering things like hard drives which can range from 8 to 20 (?) Gb, or the new video encoding chip from Focus which doesn't have Linux support yet."

RanmaPlex asks: "I've been asked by a university professor to design a network security lab for use by about 15 students. Designing a course was asked earlier, but little info was discussed on equipment. It needs to be vendor independent if possible. I've got ideas on using virtual machines, patches, IDS, firewalls/vpn and sniffers but would like to know what the Slashdot community can come up with."

alucard writes "The JourneyOS people have published this overview of their upcoming window system. It looks like it is OpenGL based and uses XML as the communications protocol. The biggest news is that it is supposed to have Xlib compatibility, but uses HyperQueues instead of Unix domain sockets. Could this get rid of the speed problems of XFree86 while still retaining Xlib compatibility? I think this is something everyone wants, but projects to create alternative GUIs such as Fresco and PicoGUI have given up any hope of compatibility with X11 or Xlib. Can we expect another alternative out there soon?"

alucard writes "The JourneyOS people have published this overview of their upcoming window system. It looks like it is OpenGL based and uses XML as the communications protocol. The biggest news is that it is supposed to have Xlib compatibility, but uses HyperQueues instead of Unix domain sockets. Could this get rid of the speed problems of XFree86 while still retaining Xlib compatibility? I think this is something everyone wants, but projects to create alternative GUIs such as Fresco and PicoGUI have given up any hope of compatibility with X11 or Xlib. Can we expect another alternative out there soon?"

alucard writes "The JourneyOS people have published this overview of their upcoming window system. It looks like it is OpenGL based and uses XML as the communications protocol. The biggest news is that it is supposed to have Xlib compatibility, but uses HyperQueues instead of Unix domain sockets. Could this get rid of the speed problems of XFree86 while still retaining Xlib compatibility? I think this is something everyone wants, but projects to create alternative GUIs such as Fresco and PicoGUI have given up any hope of compatibility with X11 or Xlib. Can we expect another alternative out there soon?"

Midnight Warrior asks: "I am one system administrator for what is an organization of dozens of LANs. Together, we all must keep our machines patched. Now we can all watch CVE, frequent securityfocus.com, or let LWN [Updated vulnerabilities section] bring things together. LWN does a fabulous job, but I'm looking for something bigger and more personalized that doesn't require the system be on the internet. Freshmeat, SourceForge, and Google are all NULL on this question: is there a database, and scraping agents in existence that will let one person oversee dozens of OS installations, a mish-mash of software packages, and an even worse level of up-to-date patching exist so that when a new vulnerability against, say, OpenSSH comes out, I can look up which systems need to be tested and patched? My work should be limited to maintaining OS (not just Linux distros), software versions, and current patch lists. This is a classic database problem, but has someone already solved it?"

giantsfan89 writes "A report from CNN says that a shuttle (possibly Atlantis) could fly again next fall. "The latest launch window is September 12 to October 10, NASA said Friday." A conference call referenced in the NY Times (free reg or via Google News) says it'll be an uphill battle (obviously) but that 'I'll also guarantee you that we're getting an awful lot smarter about this and we're going to come back stronger and safer as a result.'"

Xen Team writes "The University of Cambridge Computer Laboratory Systems Research Group is pleased to announce the open source release of Xen, a virtual machine monitor for x86. Xen lets you run multiple operating system images at the same time on the same PC hardware, with unprecedented levels of performance and resource isolation. Even under the most demanding workloads the performance overhead is just a few percent --- considerably less than alternatives such as VMware Workstation and User Mode Linux. This makes Xen ideal for use in providing secure virtual hosting, or even just for running multiple OSes on a desktop machine."

The Xen team continues: "Xen requires guest operating systems to be ported to run over it. Crucially, only the kernel needs to be ported, and all user-level application binaries and libraries can run unmodified. We have a fully functional port of Linux 2.4.22 running over Xen, and regularly use it for running demanding applications like Apache, PostgreSQL and Mozilla. Any Linux distribution should run unmodified over the ported kernel. With assistance from Microsoft Research, we have a port of Windows XP to Xen nearly complete, and are planning a FreeBSD 4.8 port in the near future.

"Visit the project homepage to find out more, and download the project source code or the XenDemoCD, a bootable 'live iso' image that enables you to play with Xen/Linux 2.4 without needing to install it on your hard drive. The CD also contains full source code, build tools, and benchmarks. Our SOSP paper gives an overview of the design of Xen, and evaluates the performance against other virtualization techniques.

"Work on Xen is supported by UK EPSRC grant GR/S01894, Intel Research Cambridge, and Microsoft Research Cambridge via an Embedded XP IFP award."

Semi-Anonymous Reader writes "Skipper 1.6.0 is a GPLed Linux accessibility suite for the severely physically disabled - cerebral palsy, road traffic accidents, motor neuron disease, Parkinsons etc. It takes input from multiple devices like graphics tablets and microswitches connected directly to the printer port, does input switching and processing (configured graphically like modular synthesisers), and provides clever genetically annealed menu systems for application and desktop control. With just one detectable click, people can have full Web and email access - in fact the whole Linux desktop - in complete privacy. Now the problem's getting it to people who need it. Charities and institutions think physical, Windows and money, so it's down to the geeks. Set up a kid near you this Fall - they might not be the next Einstein or Mozart, but you'll be giving them a lifetime of education, activity, self-expression and self-determination."

Semi-Anonymous Reader writes "Skipper 1.6.0 is a GPLed Linux accessibility suite for the severely physically disabled - cerebral palsy, road traffic accidents, motor neuron disease, Parkinsons etc. It takes input from multiple devices like graphics tablets and microswitches connected directly to the printer port, does input switching and processing (configured graphically like modular synthesisers), and provides clever genetically annealed menu systems for application and desktop control. With just one detectable click, people can have full Web and email access - in fact the whole Linux desktop - in complete privacy. Now the problem's getting it to people who need it. Charities and institutions think physical, Windows and money, so it's down to the geeks. Set up a kid near you this Fall - they might not be the next Einstein or Mozart, but you'll be giving them a lifetime of education, activity, self-expression and self-determination."

Sparks23 writes "Third-party instant messaging clients have begun to reconnect to Yahoo. While the authorization scheme has not been completely decoded -- expect some bumps -- Gaim and Trillian have both partially restored connectivity. Gaim has the new authorization scheme in CVS and their new 0.70 release, and Cerulean has made a beta patch available for Trillian Pro 2.0; consider both patches 'beta' for the moment."

jj00 writes "CNET News is reporting that Yahoo has started blocking 3rd party Messenger clients from their service. The article is about Trillian, but I have noticed that my gaim client hasn't been working for the past few days." As reported earlier.

Slashback tonight brings you more on recent RIAA madness, the readability of scrambled words, word of the return of Nullsoft's WASTE, another decision against the FTC's do-not-call list, and more -- read on for the details. The issue is greyer than you might think. SirFozzie writes "A Denver, Colorado judge has blocked the implementation of the Do-Not-Call List for a 2nd time, hours after the House and Senate passed the bill overwhelmingly, claiming that telemarketer's free speech rights would be infringed if this was to take affect. In the MSNBC story, judge Edward Nottingham ruled that "The Federal Trade Commission has chosen to entangle itself too much in the consumers' decision by manipulating consumer choice and favoring speech by charitable (organizations) over commercial speech." What's next? Constitutional Amendment?"

Follow-up: Can You Raed Tihs? meal worms writes "A Slashdot article appearing last Monday, which reported on the claim that scrambled words are legible as long as first and last letters are in place, was circulated to the University of British Columbia's Linguistics department. An interesting counter-example resulted:

"Anidroccg to crad cniyrrag lcitsiugnis planoissefors at an uemannd, utisreviny in Bsitirh Cibmuloa, and crartnoy to the duoibus cmials of the ueticnd rcraeseh, a slpmie, macinahcel ioisrevnn of ianretnl cretcarahs araepps sneiciffut to csufnoe the eadyrevy oekoolnr."

As demonstrated, a simple inversion of the internal characters results in a text which is relatively hard to decipher."

Addendum to Tough California Anti-Spam Law Signed On September 23, we mentioned California's new spam-ban law; srmalloy writes "The text of the new law, added by S.B. 186, is here."

Now you can WASTE away again in Margaritaville. adamsmith_uk writes "WASTE is open source small P2P network software supporting IM, group chat, file browsing/searching, and file transfer. It was released by Nullsoft and then removed by AOL, its parent company, in matter of hours. WASTE is now up to version 1.1 and back on Sourceforge. Get it while you can!"

Next time, Gadget Grandmother ... next time! FrankBama writes "The RIAA sued a grandmother for sharing over 2,000 songs (including 'I'm A Thug' by Trick Daddy). The EFF got involved and RIAA dropped the suit. This was done as a 'gesture of good faith' but the record industry spokesperson says they still think it's the right account.

260 other defendants still outstanding."

More of Orson Scott Card on Net music sharing. happy_place writes "FYI, you reported the first part earlier, here's the PART 2 of Orson Scott Card's political discussion on the stupidity of the record industry subpeona frenzy."

This part of the agenda is not supposed to be hidden. Stealthgirl writes "Note to everyone on the Hidden Agenda Contest that was mentioned over the weekend: There was a lot of feedback about only undergrads being eligible for the $25,000 prize. The rules have been clarified and full time grad students are welcome as well."

Update: Ah, yes: The Fortran bit. Thomas Beuthe writes "With regards to your slashdot Fortran article of the 16 Sept 2003 entitled 'Is GNU g77 Killing Fortran?,' I just wanted to make you aware of a fully featured alternative to g77 that perhaps everyone should consider using. Please go to Walt Brainerd's site: www.fortran.com (yes, he was the one who got *that* site!) and have a look at the "F" compiler.

I discussed the problem of the lack of a good freeware compiler and its influence on the lack of Fortran education and propagation of the language with him personally when he was here giving a Fortran course. He pointed out the "F" compiler to me. This is a fully compliant compiler which he put together himself.

The source code is actually the NAG compiler, I believe, except that he's hobbled it a bit to allow it to go out for free. This means that he has restricted the syntax a little, but not the functionality. So what you get is a fully funtional compiler which is restricted to what Walt considers to be the 'best' syntax for Fortran! This makes perfect sense for education, but also allows full useage for big projects as well!

Neat eh?"

JigSaw writes "After Be went down, 2-3 "distros" of BeOS 5 PE (the free version of BeOS) were created and continued making releases by literally tweaking the internals, patching the kernel etc. in order to bring BeOS up to speed with new hardware. Additionally, these distros include lots of third party software. BeOS Max Edition is the most popular of the bunch, and version v3.0 came out today. The BFS ISO installs in its own BFS partition, however it requires a bit of attention in the way you have to burn it."

ninejaguar asks: "Slashdot did an article on an Open Source product called Prevayler, which could theoretically resolve all the problems associated with OO's rough courtship with Relational databases. Slashdot covered Prevayler when it was still 1.x. Despite fear, doubt, and memory concerns, it has reached 2.0 alpha. Is anyone currently using this non-database solution in production? If so, has it sped development because of the lack of OO-to-RDBMS complexity? Was there a significant learning curve to speak of? The LGPL'd product could be incorporated into proprietary commercial software, and few might know about it. Is anyone considering using it in a transactional environment where speed is the paramount need? And, are there any objections to using Prevayler that haven't been answered at the Prevayler wiki? Would those who use MySQL find Prevayler to be a better solution because it's tiny (less than 100kb), 3000 times faster and is inherently ACID compliant?" Update: 09/24 19:25 GMT by C :Quite a few broken links, now fixed.

"We've used relational databases for years despite incompatibilities in SQL implementation. Accessing them from an OOP paradigm has been so tedious, that Object-Relational mapping technologies have sprouted all over the Open Source landscape. Some competing examples and models are Hibernate, OJB, TJDO, XORM, and Castor; which in turn have supporting frameworks such as Spring and SQLExecutor. Because SQL is the dominant form of interfacing with the data in an RDBMS, there's now a specification to offer it a friendlier OO face.

Most of the above, including the SQL-variants, arguably appear to add yet another layer of complexity (even if only at the integration level) where they should be taking complexity away. These solutions are put together by some very smart people, but it's inescapable to get that feeling someone is missing the forest (simple answer) because all the trees (incompatible models) are in the way. If there are so many after-the-fact solutions attempting to simplify relational database access and manipulation from OO, isn't it reasonable to think that there is something generally wrong with trying to cobble-together two disparate concepts with what are essentially high-caliber hacks? Is Prevayler a better way?"

ninejaguar asks: "Slashdot did an article on an Open Source product called Prevayler, which could theoretically resolve all the problems associated with OO's rough courtship with Relational databases. Slashdot covered Prevayler when it was still 1.x. Despite fear, doubt, and memory concerns, it has reached 2.0 alpha. Is anyone currently using this non-database solution in production? If so, has it sped development because of the lack of OO-to-RDBMS complexity? Was there a significant learning curve to speak of? The LGPL'd product could be incorporated into proprietary commercial software, and few might know about it. Is anyone considering using it in a transactional environment where speed is the paramount need? And, are there any objections to using Prevayler that haven't been answered at the Prevayler wiki? Would those who use MySQL find Prevayler to be a better solution because it's tiny (less than 100kb), 3000 times faster and is inherently ACID compliant?" Update: 09/24 19:25 GMT by C :Quite a few broken links, now fixed.

"We've used relational databases for years despite incompatibilities in SQL implementation. Accessing them from an OOP paradigm has been so tedious, that Object-Relational mapping technologies have sprouted all over the Open Source landscape. Some competing examples and models are Hibernate, OJB, TJDO, XORM, and Castor; which in turn have supporting frameworks such as Spring and SQLExecutor. Because SQL is the dominant form of interfacing with the data in an RDBMS, there's now a specification to offer it a friendlier OO face.

Most of the above, including the SQL-variants, arguably appear to add yet another layer of complexity (even if only at the integration level) where they should be taking complexity away. These solutions are put together by some very smart people, but it's inescapable to get that feeling someone is missing the forest (simple answer) because all the trees (incompatible models) are in the way. If there are so many after-the-fact solutions attempting to simplify relational database access and manipulation from OO, isn't it reasonable to think that there is something generally wrong with trying to cobble-together two disparate concepts with what are essentially high-caliber hacks? Is Prevayler a better way?"

ninejaguar asks: "Slashdot did an article on an Open Source product called Prevayler, which could theoretically resolve all the problems associated with OO's rough courtship with Relational databases. Slashdot covered Prevayler when it was still 1.x. Despite fear, doubt, and memory concerns, it has reached 2.0 alpha. Is anyone currently using this non-database solution in production? If so, has it sped development because of the lack of OO-to-RDBMS complexity? Was there a significant learning curve to speak of? The LGPL'd product could be incorporated into proprietary commercial software, and few might know about it. Is anyone considering using it in a transactional environment where speed is the paramount need? And, are there any objections to using Prevayler that haven't been answered at the Prevayler wiki? Would those who use MySQL find Prevayler to be a better solution because it's tiny (less than 100kb), 3000 times faster and is inherently ACID compliant?" Update: 09/24 19:25 GMT by C :Quite a few broken links, now fixed.

"We've used relational databases for years despite incompatibilities in SQL implementation. Accessing them from an OOP paradigm has been so tedious, that Object-Relational mapping technologies have sprouted all over the Open Source landscape. Some competing examples and models are Hibernate, OJB, TJDO, XORM, and Castor; which in turn have supporting frameworks such as Spring and SQLExecutor. Because SQL is the dominant form of interfacing with the data in an RDBMS, there's now a specification to offer it a friendlier OO face.

Most of the above, including the SQL-variants, arguably appear to add yet another layer of complexity (even if only at the integration level) where they should be taking complexity away. These solutions are put together by some very smart people, but it's inescapable to get that feeling someone is missing the forest (simple answer) because all the trees (incompatible models) are in the way. If there are so many after-the-fact solutions attempting to simplify relational database access and manipulation from OO, isn't it reasonable to think that there is something generally wrong with trying to cobble-together two disparate concepts with what are essentially high-caliber hacks? Is Prevayler a better way?"

briandonovan writes "World Wide Web Consortium (W3C) Director Tim Berners-Lee and his compatriots would like to transform the current Web into a 'Semantic Web' where 'software agents roaming from page to page can readily carry out sophisticated tasks for users' using 'structured collections of information and sets of inference rules.' The Resource Description Framework (RDF), designed as a language for expressing information about resources on the Web, and allied technologies are the result to date of ongoing efforts at the W3C to furnish Semantic Web proponents with the requisite tools. While it's far too early to predict whether TimBL's grand vision will be realized, RDF/XML (the XML serialization of RDF) is already in widespread use, having been incorporated into a surprising array of applications." Read on below for briandonovan's link-stuffed review of O'Reilly's Practical RDF. Practical RDF: Solving Problems with the Resource Description Framework author Shelley Powers pages 331 publisher O'Reilly & Associates rating 9/10 reviewer Brian Donovan ISBN 0596002637 summary Great introduction to RDF, an assortment of tools and utilities for working with RDF, and some real-world applications.

RDF first hit my radar screen a couple of years ago while I was working on a barebones tool to manage my personal website. I was writing the code to generate RSS feeds ("What is RSS?") for my site and had to choose whether to support RSS 0.9x (non-RDF) or RSS 1.0 (RDF-based) or both. Long story short: I went with RSS 1.0 and was able to implement the feeds, but never got any further into RDF afterwards. I couldn't make headway through the RDF-related working drafts rapidly enough to justify the time that I was spending, there weren't any worthwhile-looking books available at the time, and the few online tutorials that I found were sorely lacking -- possibly because the specs themselves were still evolving as the RDF Core Working Group hashed out some remaining issues.

Fast forward a few years: the dust in RDF-land seems to be settling a bit (although new working drafts of all of the current RDF specs were released on September 5th, most of the changes from previous versions appear to be relatively minor) and, with the publication of Shelley Powers' Practical RDF: Solving Problems with the Resource Description Framework, there's finally a good book available on the subject.

Overview After an introductory chapter that touches on the history of RDF and some applications of RDF/XML (the preferred, W3C-blessed serialization of RDF), the book is divided into three broad sections. In the first, the reader is guided through the raft of documentation produced by the RDF Core WG, including : Resource Description Framework (RDF): Concepts and Abstract Data Model, RDF/XML Syntax Specification, RDF Model Theory (formerly Semantics), and RDF Vocabulary Description Language 1.0: RDF Schema. Before moving on to Part II, where she surveys programming language support and tools available for working with RDF (with code snippets where appropriate), Powers spends a chapter developing an RDF vocabulary, "PostCon," that's used throughout the remainder of the book for demo purposes.

Chapter 7, the first in the tools-focused portion of Practical RDF is dedicated to (mostly Java-based) editors, parsers, validators, browsers, etc. for desktop use. Next, she dives into Jena, the Java RDF toolkit that began life as the labor of love of HP Labs researcher Brian McBride before being elevated to the status of a formal HP Labs project under their Semantic Web Research umbrella. Another HP Labs Semantic Web project, Damian Steer's BrownSauce, a slick little Java-based RDF browser, was introduced back in Chapter7. Means for manipulating RDF/XML in Perl (RDF::Core, part of Ginger Alliance's PerlRDF project), PHP (RAP, the RDF API for PHP), and Python (RDFLib) are addressed in Chapter 9. RDF query engines/languages are taken up next -- rdfDB QL, the query language of R.V. Guha's rdfDB (written in C); SquishQL, implemented in the Java-based Inkling query engine (built atop PostgreSQL); RDQL, used within Jena; and Sesame, a JSP/Servlet querying engine that supports both RDQL and its own query language, RQL, and can be deployed atop MySQL or PostgreSQL. Powers rounds out this part of her book with a chapter that deals briefly with the leftovers. Drive, an RDF API for C#, is briefly discussed along with RDF APIs for less fashionable programming languages : Nokia's Wilbur for CLOS, XOTcl for Tcl, and RubyRDF for Ruby. Redland, an RDF toolkit written in C with Java, Perl, PHP, Python, Ruby, and Tcl wrappers, is covered at some length (about half a dozen pages) and a couple more are given over to Redfoot, a Python RDF framework consisting of RDFLib (mentioned earlier in the Perl/PHP/Python chapter), a small-footprint HTTP server (according to the changelog at redfoot.net, they're using Medusa), and a native scripting language called Hypercode that lives within CDATA blocks in RDF/XML (example).

The last third of Practical RDF is devoted to uses of RDF and begins with a chapter on the OWL Web Ontology Language, an extension to RDF that's designed to supply more constraints for RDF vocabularies than can be provided by RDF Schema alone. This chapter would have been better situated after Chapter 5, which addresses RDF Schema, and feels a bit out of place here. RSS 1.0, the RDF-based syndication format, gets a chapter all of its own, beginning with a short synopsis of the evolution of RSS and the rift between the RSS 0.9x/2.0 and RSS 1.0 camps, progressing through descriptions of the RSS elements, some discussion of the use of modules, RSS autodiscovery, and aggregators (Amphetadesk, Meerkat, and NetNewsWire are mentioned), and finishing with an example RSS file (a syndicated list of book recommendations), producing RSS 1.0 using the Informa RSS Library (a set of Java classes), and merging two RSS 1.0 files using the XML::RSS Perl module. Two "Applications Based on RDF" (commercial and noncommercial) chapters top off the book. Noncommercial applications of RDF are visited first : Mozilla, where history and bookmarks, among other classes of information, are stored in RDF; the Creative Commons licensing scheme, whose proponents encourage content creators to embed RDF snippets into their documents and applications to provide information about the work itself and the restrictions placed on its reuse under the particular CC license that they've chosen; a Java and PostgreSQL based digital library system jointly developed by MIT and HP that uses RDF; and FOAF (Friend-of-a-Friend), an RDF vocabulary designed to express personal information and interpersonal relationships. Among the list of commercial applications utilizing RDF that comprises the final chapter in the book is Chandler, the same as yet very-alpha personal information manager that's managed to garner multiple mentions on this site.

The Verdict

The real meat of Practical RDF, for me, was in Chapters 1 through 6 (plus the OWL chapter, Chapter 12). This is not to say that the material in the last 2/3 of the book isn't useful or interesting. The section on RDF software tools is a great annotated survey of what's out there right now ... and I would imagine that installing and testdriving each of the software applications featured in those chapters must have been an extremely time-consuming process. The chapters describing real-world applications of RDF could be useful to someone trying to convince a manager that RDF is a viable, widely-used technology. Given a choice, though, I would rather have seen those pages spent on additional coverage of RDF, RDFS, and OWL with more example RDF vocabularies developed (like PostCon, which the author formulated, then refined through RDFS and OWL). The displaced material could have been made available online at the author's site for the book. A lot of that information will become less accurate over time as the software evolves and people come up with more applications for RDF anyway.

All nitpicking aside, though, if you're looking for a book on RDF, then you can't go wrong with Shelley Powers' Practical RDF.

You can purchase Practical RDF from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

briandonovan writes "World Wide Web Consortium (W3C) Director Tim Berners-Lee and his compatriots would like to transform the current Web into a 'Semantic Web' where 'software agents roaming from page to page can readily carry out sophisticated tasks for users' using 'structured collections of information and sets of inference rules.' The Resource Description Framework (RDF), designed as a language for expressing information about resources on the Web, and allied technologies are the result to date of ongoing efforts at the W3C to furnish Semantic Web proponents with the requisite tools. While it's far too early to predict whether TimBL's grand vision will be realized, RDF/XML (the XML serialization of RDF) is already in widespread use, having been incorporated into a surprising array of applications." Read on below for briandonovan's link-stuffed review of O'Reilly's Practical RDF. Practical RDF: Solving Problems with the Resource Description Framework author Shelley Powers pages 331 publisher O'Reilly & Associates rating 9/10 reviewer Brian Donovan ISBN 0596002637 summary Great introduction to RDF, an assortment of tools and utilities for working with RDF, and some real-world applications.

RDF first hit my radar screen a couple of years ago while I was working on a barebones tool to manage my personal website. I was writing the code to generate RSS feeds ("What is RSS?") for my site and had to choose whether to support RSS 0.9x (non-RDF) or RSS 1.0 (RDF-based) or both. Long story short: I went with RSS 1.0 and was able to implement the feeds, but never got any further into RDF afterwards. I couldn't make headway through the RDF-related working drafts rapidly enough to justify the time that I was spending, there weren't any worthwhile-looking books available at the time, and the few online tutorials that I found were sorely lacking -- possibly because the specs themselves were still evolving as the RDF Core Working Group hashed out some remaining issues.

Fast forward a few years: the dust in RDF-land seems to be settling a bit (although new working drafts of all of the current RDF specs were released on September 5th, most of the changes from previous versions appear to be relatively minor) and, with the publication of Shelley Powers' Practical RDF: Solving Problems with the Resource Description Framework, there's finally a good book available on the subject.

Overview After an introductory chapter that touches on the history of RDF and some applications of RDF/XML (the preferred, W3C-blessed serialization of RDF), the book is divided into three broad sections. In the first, the reader is guided through the raft of documentation produced by the RDF Core WG, including : Resource Description Framework (RDF): Concepts and Abstract Data Model, RDF/XML Syntax Specification, RDF Model Theory (formerly Semantics), and RDF Vocabulary Description Language 1.0: RDF Schema. Before moving on to Part II, where she surveys programming language support and tools available for working with RDF (with code snippets where appropriate), Powers spends a chapter developing an RDF vocabulary, "PostCon," that's used throughout the remainder of the book for demo purposes.

Chapter 7, the first in the tools-focused portion of Practical RDF is dedicated to (mostly Java-based) editors, parsers, validators, browsers, etc. for desktop use. Next, she dives into Jena, the Java RDF toolkit that began life as the labor of love of HP Labs researcher Brian McBride before being elevated to the status of a formal HP Labs project under their Semantic Web Research umbrella. Another HP Labs Semantic Web project, Damian Steer's BrownSauce, a slick little Java-based RDF browser, was introduced back in Chapter7. Means for manipulating RDF/XML in Perl (RDF::Core, part of Ginger Alliance's PerlRDF project), PHP (RAP, the RDF API for PHP), and Python (RDFLib) are addressed in Chapter 9. RDF query engines/languages are taken up next -- rdfDB QL, the query language of R.V. Guha's rdfDB (written in C); SquishQL, implemented in the Java-based Inkling query engine (built atop PostgreSQL); RDQL, used within Jena; and Sesame, a JSP/Servlet querying engine that supports both RDQL and its own query language, RQL, and can be deployed atop MySQL or PostgreSQL. Powers rounds out this part of her book with a chapter that deals briefly with the leftovers. Drive, an RDF API for C#, is briefly discussed along with RDF APIs for less fashionable programming languages : Nokia's Wilbur for CLOS, XOTcl for Tcl, and RubyRDF for Ruby. Redland, an RDF toolkit written in C with Java, Perl, PHP, Python, Ruby, and Tcl wrappers, is covered at some length (about half a dozen pages) and a couple more are given over to Redfoot, a Python RDF framework consisting of RDFLib (mentioned earlier in the Perl/PHP/Python chapter), a small-footprint HTTP server (according to the changelog at redfoot.net, they're using Medusa), and a native scripting language called Hypercode that lives within CDATA blocks in RDF/XML (example).

The last third of Practical RDF is devoted to uses of RDF and begins with a chapter on the OWL Web Ontology Language, an extension to RDF that's designed to supply more constraints for RDF vocabularies than can be provided by RDF Schema alone. This chapter would have been better situated after Chapter 5, which addresses RDF Schema, and feels a bit out of place here. RSS 1.0, the RDF-based syndication format, gets a chapter all of its own, beginning with a short synopsis of the evolution of RSS and the rift between the RSS 0.9x/2.0 and RSS 1.0 camps, progressing through descriptions of the RSS elements, some discussion of the use of modules, RSS autodiscovery, and aggregators (Amphetadesk, Meerkat, and NetNewsWire are mentioned), and finishing with an example RSS file (a syndicated list of book recommendations), producing RSS 1.0 using the Informa RSS Library (a set of Java classes), and merging two RSS 1.0 files using the XML::RSS Perl module. Two "Applications Based on RDF" (commercial and noncommercial) chapters top off the book. Noncommercial applications of RDF are visited first : Mozilla, where history and bookmarks, among other classes of information, are stored in RDF; the Creative Commons licensing scheme, whose proponents encourage content creators to embed RDF snippets into their documents and applications to provide information about the work itself and the restrictions placed on its reuse under the particular CC license that they've chosen; a Java and PostgreSQL based digital library system jointly developed by MIT and HP that uses RDF; and FOAF (Friend-of-a-Friend), an RDF vocabulary designed to express personal information and interpersonal relationships. Among the list of commercial applications utilizing RDF that comprises the final chapter in the book is Chandler, the same as yet very-alpha personal information manager that's managed to garner multiple mentions on this site.

The Verdict

The real meat of Practical RDF, for me, was in Chapters 1 through 6 (plus the OWL chapter, Chapter 12). This is not to say that the material in the last 2/3 of the book isn't useful or interesting. The section on RDF software tools is a great annotated survey of what's out there right now ... and I would imagine that installing and testdriving each of the software applications featured in those chapters must have been an extremely time-consuming process. The chapters describing real-world applications of RDF could be useful to someone trying to convince a manager that RDF is a viable, widely-used technology. Given a choice, though, I would rather have seen those pages spent on additional coverage of RDF, RDFS, and OWL with more example RDF vocabularies developed (like PostCon, which the author formulated, then refined through RDFS and OWL). The displaced material could have been made available online at the author's site for the book. A lot of that information will become less accurate over time as the software evolves and people come up with more applications for RDF anyway.

All nitpicking aside, though, if you're looking for a book on RDF, then you can't go wrong with Shelley Powers' Practical RDF.

You can purchase Practical RDF from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

briandonovan writes "World Wide Web Consortium (W3C) Director Tim Berners-Lee and his compatriots would like to transform the current Web into a 'Semantic Web' where 'software agents roaming from page to page can readily carry out sophisticated tasks for users' using 'structured collections of information and sets of inference rules.' The Resource Description Framework (RDF), designed as a language for expressing information about resources on the Web, and allied technologies are the result to date of ongoing efforts at the W3C to furnish Semantic Web proponents with the requisite tools. While it's far too early to predict whether TimBL's grand vision will be realized, RDF/XML (the XML serialization of RDF) is already in widespread use, having been incorporated into a surprising array of applications." Read on below for briandonovan's link-stuffed review of O'Reilly's Practical RDF. Practical RDF: Solving Problems with the Resource Description Framework author Shelley Powers pages 331 publisher O'Reilly & Associates rating 9/10 reviewer Brian Donovan ISBN 0596002637 summary Great introduction to RDF, an assortment of tools and utilities for working with RDF, and some real-world applications.

RDF first hit my radar screen a couple of years ago while I was working on a barebones tool to manage my personal website. I was writing the code to generate RSS feeds ("What is RSS?") for my site and had to choose whether to support RSS 0.9x (non-RDF) or RSS 1.0 (RDF-based) or both. Long story short: I went with RSS 1.0 and was able to implement the feeds, but never got any further into RDF afterwards. I couldn't make headway through the RDF-related working drafts rapidly enough to justify the time that I was spending, there weren't any worthwhile-looking books available at the time, and the few online tutorials that I found were sorely lacking -- possibly because the specs themselves were still evolving as the RDF Core Working Group hashed out some remaining issues.

Fast forward a few years: the dust in RDF-land seems to be settling a bit (although new working drafts of all of the current RDF specs were released on September 5th, most of the changes from previous versions appear to be relatively minor) and, with the publication of Shelley Powers' Practical RDF: Solving Problems with the Resource Description Framework, there's finally a good book available on the subject.

Overview After an introductory chapter that touches on the history of RDF and some applications of RDF/XML (the preferred, W3C-blessed serialization of RDF), the book is divided into three broad sections. In the first, the reader is guided through the raft of documentation produced by the RDF Core WG, including : Resource Description Framework (RDF): Concepts and Abstract Data Model, RDF/XML Syntax Specification, RDF Model Theory (formerly Semantics), and RDF Vocabulary Description Language 1.0: RDF Schema. Before moving on to Part II, where she surveys programming language support and tools available for working with RDF (with code snippets where appropriate), Powers spends a chapter developing an RDF vocabulary, "PostCon," that's used throughout the remainder of the book for demo purposes.

Chapter 7, the first in the tools-focused portion of Practical RDF is dedicated to (mostly Java-based) editors, parsers, validators, browsers, etc. for desktop use. Next, she dives into Jena, the Java RDF toolkit that began life as the labor of love of HP Labs researcher Brian McBride before being elevated to the status of a formal HP Labs project under their Semantic Web Research umbrella. Another HP Labs Semantic Web project, Damian Steer's BrownSauce, a slick little Java-based RDF browser, was introduced back in Chapter7. Means for manipulating RDF/XML in Perl (RDF::Core, part of Ginger Alliance's PerlRDF project), PHP (RAP, the RDF API for PHP), and Python (RDFLib) are addressed in Chapter 9. RDF query engines/languages are taken up next -- rdfDB QL, the query language of R.V. Guha's rdfDB (written in C); SquishQL, implemented in the Java-based Inkling query engine (built atop PostgreSQL); RDQL, used within Jena; and Sesame, a JSP/Servlet querying engine that supports both RDQL and its own query language, RQL, and can be deployed atop MySQL or PostgreSQL. Powers rounds out this part of her book with a chapter that deals briefly with the leftovers. Drive, an RDF API for C#, is briefly discussed along with RDF APIs for less fashionable programming languages : Nokia's Wilbur for CLOS, XOTcl for Tcl, and RubyRDF for Ruby. Redland, an RDF toolkit written in C with Java, Perl, PHP, Python, Ruby, and Tcl wrappers, is covered at some length (about half a dozen pages) and a couple more are given over to Redfoot, a Python RDF framework consisting of RDFLib (mentioned earlier in the Perl/PHP/Python chapter), a small-footprint HTTP server (according to the changelog at redfoot.net, they're using Medusa), and a native scripting language called Hypercode that lives within CDATA blocks in RDF/XML (example).

The last third of Practical RDF is devoted to uses of RDF and begins with a chapter on the OWL Web Ontology Language, an extension to RDF that's designed to supply more constraints for RDF vocabularies than can be provided by RDF Schema alone. This chapter would have been better situated after Chapter 5, which addresses RDF Schema, and feels a bit out of place here. RSS 1.0, the RDF-based syndication format, gets a chapter all of its own, beginning with a short synopsis of the evolution of RSS and the rift between the RSS 0.9x/2.0 and RSS 1.0 camps, progressing through descriptions of the RSS elements, some discussion of the use of modules, RSS autodiscovery, and aggregators (Amphetadesk, Meerkat, and NetNewsWire are mentioned), and finishing with an example RSS file (a syndicated list of book recommendations), producing RSS 1.0 using the Informa RSS Library (a set of Java classes), and merging two RSS 1.0 files using the XML::RSS Perl module. Two "Applications Based on RDF" (commercial and noncommercial) chapters top off the book. Noncommercial applications of RDF are visited first : Mozilla, where history and bookmarks, among other classes of information, are stored in RDF; the Creative Commons licensing scheme, whose proponents encourage content creators to embed RDF snippets into their documents and applications to provide information about the work itself and the restrictions placed on its reuse under the particular CC license that they've chosen; a Java and PostgreSQL based digital library system jointly developed by MIT and HP that uses RDF; and FOAF (Friend-of-a-Friend), an RDF vocabulary designed to express personal information and interpersonal relationships. Among the list of commercial applications utilizing RDF that comprises the final chapter in the book is Chandler, the same as yet very-alpha personal information manager that's managed to garner multiple mentions on this site.

The Verdict

The real meat of Practical RDF, for me, was in Chapters 1 through 6 (plus the OWL chapter, Chapter 12). This is not to say that the material in the last 2/3 of the book isn't useful or interesting. The section on RDF software tools is a great annotated survey of what's out there right now ... and I would imagine that installing and testdriving each of the software applications featured in those chapters must have been an extremely time-consuming process. The chapters describing real-world applications of RDF could be useful to someone trying to convince a manager that RDF is a viable, widely-used technology. Given a choice, though, I would rather have seen those pages spent on additional coverage of RDF, RDFS, and OWL with more example RDF vocabularies developed (like PostCon, which the author formulated, then refined through RDFS and OWL). The displaced material could have been made available online at the author's site for the book. A lot of that information will become less accurate over time as the software evolves and people come up with more applications for RDF anyway.

All nitpicking aside, though, if you're looking for a book on RDF, then you can't go wrong with Shelley Powers' Practical RDF.

You can purchase Practical RDF from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.