“Design depends largely on constraints.” — Charles Eames
Monday, 21 January 2008
I’m following the discussion of RESTful Web description in general, and WADL in particular, with both difficulty and interest (see Dare, Patrick and Joe’s thoughts for a nice contrast). Difficulty because there’s so much of it, and it’s hard...
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Friday, 2 November 2007
I've updated the WADL documentation stylesheet, primarily to; Fix a bug with finding and displaying XML Schema Make it compatible with xsltproc (and hopefully most other XSLT1.0 processors that understand EXSLT node-set) Generate valid XHTML The hard part was...
Thursday, 5 April 2007
We’ve announced the program for this years’ Developers’ Track, and I’m very excited about the lineup. For example, Ryan Boyd from Google will be presenting about GData right before Pasha Sadri talks about Yahoo! Pipes. These are two cutting-edge...
Wednesday, 7 February 2007
Yahoo! (finally!) released Pipes as a beta today; congrats to the very talented team that put this together. Niall gives the geeks-eye view, and to be clear, this is not going to be the next great consumer Web site;...
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Thursday, 30 November 2006
One of the perceived deficiencies of JSON is that it doesn’t have a schema language. I say “perceived” because the problems that a schema language brings often outweigh the benefits; after all, look at the mess that XML Schema...
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Friday, 7 April 2006
It’s become axiomatic in some circles — especially in WS-* land, as well as in many other uses of XML — that the preferred (or only) means of offering extensibility is through URI-based namespaces, along with a flag to...
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Monday, 23 January 2006
I’ve been playing around with some ideas that use XMLHttpRequest recently, but I keep on bumping up against implementation inconsistencies on IE vs. Safari vs. Opera vs. Mozilla. Although the interface exposed is pretty much the same, what it...
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Tuesday, 18 October 2005
I’ve raved before about how useful the XSLT document() function is, once you get used to it. However, the stars have to be aligned just so to use it; the Web site can’t use cookies for anything important, and the...
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Monday, 5 September 2005
Feed History draft -04 is out, with the only major change being the replacement of fh:stateful with fh:incremental, with corresponding changes throughout the document, to make the concepts a bit clearer. This revision also makes cardinality, relative URIs and...
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Monday, 15 August 2005
Draft -03 of Feed History: Enabling Stateful Syndication is now available. Significant changes include: Added fh:archive element, to indicate that an entry is an archive Allow subscription feed to omit fh:stateful if fh:prev is present Clarified that fh doesn’t...
Saturday, 13 August 2005
When I worked in the financial industry, I quickly noticed that Excel spreadsheets contain the bulk of the data in the enterprise. It may make IT execs tear their hair out, but having the data nearby and ready for...
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Wednesday, 10 August 2005
For some time, I’ve noticed that people defining XML formats spend an inordinate amount of time talking about the structure of the format. This is especially apparent in standards working groups, where hours — no, days — can be...
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Friday, 8 July 2005
You can describe just about anything with sufficient precision in plain English, given enough words. In practice, this doesn’t happen; specialised fields — whether science, finance or art — develop specialised jargon as a shorthand for concepts that are...
Tuesday, 14 June 2005
Or, What’s Wrong with XInclude? QNames are evil (at least in content), so I never really liked the WSDL convention of using them to name and refer to constructs. It makes much more sense to refer to things on the...
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Tuesday, 24 May 2005
The W3C has just started a mailing list for discussion of Web description formats; This mailing list is dedicated to discussion of Web description languages based on URI/IRI and HTTP, and aligned with the Web and REST Architecture. Unlike...
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Saturday, 21 May 2005
If you accept that QNames in content are evil, the next logical question is whether XML Base is any better. In fact, if you turn your head a certain way, it appears that there’s very little difference between a...
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Wednesday, 18 May 2005
Marc Hadley has released WADL in the wild, and I’m intrigued; based on a first look, I’d say it’s the most promising Web (as opposed to Web Services) description language yet. Why? First of all, it’s very resource-oriented; you...
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Tuesday, 17 May 2005
OxygenXML 6.0 is out, and it sucks even less. The biggest news is — finally! — a visual Schema editor. This may be the biggest threat yet to Gudge’s job security, as Human Schema Editor. :) I’ve only played...
Friday, 29 April 2005
Today’s release of Tiger includes a new but little-discussed framework for developers, CoreData. What’s most interesting to me is its similarities — and differences — to SDO, IBM and BEA’s* effort to abstract away the specifics of how data...
Sunday, 24 April 2005
XML is arguably one of the bigger things to come onto industry’s radar for a while, and as a result programming languages (e.g., ECMAScript, Comega, Java) are changing to accommodate it. This isn’t just happening in libraries; the syntax...
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Friday, 1 April 2005
RDF has a simple, usable, universal model; everything’s nodes and arcs, so it avoids the problems of the Infoset, which IMO are brought by its complexity and special cases. Years of disquiet about attributes by portions of the XML...
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Wednesday, 2 March 2005
So, you’ve got some data that you need to give to somebody else, and you want to use XML to do it; good for you, you’ve seen the light / hopped on the bandwagon / drunk the Kool-Aid. At...
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Tuesday, 22 February 2005
I love the XSLT document function. With it, you can access the whole Web from a stylesheet; this gives a lot of flexibility, in the right situation. For example, my local library’s online system is based upon iPac (now...
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Monday, 24 January 2005
I’m intrigued by the JSON effort. While many people (and vendors) have chosen XML for data interchange because it’s not platform- or vendor-specific, these folks have chosen the other path; by leveraging the serialisation of data structures in ECMAScript...
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Friday, 17 December 2004
The Australian Bureau of Statistics has released an SVG-based "animated population pyramid" that very nicely visualises the change in that country's population over time.
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Thursday, 5 August 2004
(Another instalment in “XML Heresies.”) One of the foundations of most vendors’ approach to Web services is called document-oriented messaging. This is the notion that interoperability is improved by describing a protocol in terms of the artefacts that are exchanged...
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Monday, 26 July 2004
From the Daily Python URL comes another noteworthy API for XML; XMLFragment. I haven’t tried it yet (it doesn’t appear to be separately available, hint, hint), but I like the look of it. There are two interesting things going on...
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Wednesday, 23 June 2004
John Schneider was in the office last week and gave me a demo of something he’s been working on for a while, E4X — by far one of the coolest technologies I’ve seen in some time. I think that every...
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Friday, 28 May 2004
I’ve been talking with a few people about my previous assertion that the Infoset is a bad abstraction for data modelling, and my subsequent post about the informational properties of the Infoset. The feedback has been positive, especially regarding the...
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Wednesday, 12 May 2004
Recently, I’ve been thinking about the influences that using the Infoset has on the information you place in it. To put it another way: if you work with XML at the Infoset level, what tools are you given to express...
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Tuesday, 11 May 2004
I’ve been playing around with the new OxygenXML 4.0 plug-in for Eclipse M8. Overall, it's very good; much better than the competition, although a lot of the slickness can be attributed to Eclipse. While it isn’t everything I want in...
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Friday, 7 May 2004
To help inform discussion of XOP (and to save Sam the trouble ;), I’ve put together a quick-and-dirty (we’re talking two hours) XOP parser in Python. It isn’t particularly efficient, nor is it well-tested or robust; it’s only to demonstrate...
Wednesday, 5 May 2004
Without pointing fingers, some people have a bee in their collective bonnet about the dangers of allowing binary content to be represented in XML, care of XOP. Others are up in arms about re-inventing HTTP in SOAP, courtesy of the...
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Friday, 9 April 2004
This is a good idea for so many reasons. The media type registration will have to be changed to take advantage of it, but I believe that RFC3023 is under review anyway....
Sunday, 7 March 2004
An interesting issue poked its head up at the W3C Technical Plenary last week. XML Protocol (known as SOAP to mere mortals) is defined in terms of XML Infosets — it describes how to move Infosets around and process them,...
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Saturday, 7 February 2004
One of the uglier corners in the Web architecture is the relationship between fragment ids (the bit of the URI at the end, after the “#”) and content negotiation. In a nutshell, because dereferencing a single URI can return multiple...
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Monday, 12 January 2004
There’s a lot of interest out there about exposing XQuery 1.0 / XPath 1.0 / XPath 2.0 in Web interfaces. On the face of it, this is quite a compelling idea; it allows you to reuse a generic query mechanism...
Saturday, 6 December 2003
How's this analogy: Putting QNames into your XML content is like using TCP packets as delimiters in an application protocol. Both can be technically done, but they force an awareness of the special problems they bring up in software layers...
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Wednesday, 26 November 2003
I’m getting a few requests for clarification and additional information from 3rd party vendors regarding my previous rant on XML editing. With any luck, XML editing will get much more interesting soon…...
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Thursday, 2 October 2003
I'm seriously sick of using programs that call themselves "XML editors" because they colourize markup. I'm talking about XML Spy, Oxygen, BBEdit, and thousands of lesser programs. All of them are just glorified text editors - they still operate on...
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Saturday, 14 June 2003
Sean McGrath, Macintouch and others point out OxygenXML, a pretty slick-looking XML editor. Either it's pretty new and only now coming onto the scene, or I've had my head deeper in the sand than is typical. To put it through...