Ross Singer <rossfsin...@gmail.com> wrote: > This is definitely where RDF outclasses almost every alternative*, because > each serialization (besides RDF/XML) works extremely well for specific > purposes [...]
Hmm. That depends on what you mean by "alternative to RDF serialisation". I can think of a few, amongst them obviously (for me) is Topic Maps which don't go down the evil triplet way with conversion back and to an underlying data model. Having said that, there's tuples of many kinds, it's only that the triplet is the most used under the W3C banner. Many are using to a more expressive quad, a few crazies , for example, even though that may or may not be a better way of dealing with it. In the end, it all comes down to some variation over frames theory (or bundles); a serialisation of key/value pairs with some ontological denotation for what the semantics of that might be. It's hard to express what we perceive as knowledge in any notational form. The models and languages we propose are far inferior to what is needed for a world as complex as it is. But as you quoted George Box, some models are more useful than others. My personal experience is that I've got a hatred for RDF and triplets for many of the same reasons Eric touch on, and as many know, I prefer the more direct meta model of Topic Maps. However, these two different serialisation and meta model frameworks are - lo and behold! - compatible; there's canonical lossless conversion between the two. So the argument at this point comes down to personal taste for what makes more sense to you. As to more on problems of RDF, read this excellent (but slighlt dated) Bray article; http://www.tbray.org/ongoing/When/200x/2003/05/21/RDFNet But wait, there's more! We haven't touched upon the next layer of the cake; OWL, which is, more or less, an ontology for dealing with all things knowledge and web. And it kinda puzzles me that it is not more often mentioned (or used) in the systems we make. A lot of OWL was tailored towards being a better language for expressing knowledge (which in itself comes from DAML and OIL ontologies), and then there's RDFs, and OWL in various formats, and then ... Complexity. The problem, as far as I see it, is that there's not enough expression and rigor for the things we want to talk about in RDF, but we don't want to complicate things with OWL or RDFs either. And then there's that tedious distinction between a web resource and something that represents the thing "in reality" that RDF skipped (and hacked a 304 "solution" to). It's all a bit messy. > * Unless you're writing a parser, then having a kajillion serializations > seriously sucks. Some of us do. And yes, it sucks. I wonder about non-political solutions ever being possible again ... Regards, Alex -- Project Wrangler, SOA, Information Alchemist, UX, RESTafarian, Topic Maps http://shelter.nu/blog | google.com/+AlexanderJohannesen | http://xsiteable.org http://www.linkedin.com/in/shelterit
