[whatwg] Trying to work out the problems solved by RDFa

Calogero Alex Baldacchino alex.baldacchino at email.it
Sat Jan 10 18:51:16 PST 2009

Kornel Lesiński ha scritto:
> On 09.01.2009, at 01:54, Calogero Alex Baldacchino wrote:
>> This is why I was thinking about somewhat "data-rdfa-about", 
>> "data-rdfa-property", "data-rdfa-content" and so on, so that, for the 
>> purposes of an RDFa processor working on top of HTML5 UAs
> One can also use <link rel="alternate" href="description.rdf">. I 
> don't see why RDF metadata must be in the HTML document. It could be 
> in a separated file, maybe embedded in RSS/Atom feeds (RSS1.0 is 
> pretty close already).
> Websites that have a lot of useful data to share usually keep it in a 
> database, and this allows them to easily generate RDF as separate 
> documents without risk of getting out of sync with the HTML version.

In principle, I agree (also, Atom 1.0 embedding RDFa as dataRSS is the 
base of SearchMonkey). But if people feel the need to embed metadata in 
their documents and to use them as a distributed database, well, let's 
give them a chance to do so. :-P

eRDF might be a working compromise, because it doesn't need any changes 
to the spec; RDFa covers a wider range of RDF semantics, but requires 
new attributes and also namespaces (a sort of hybrid beteween them might 
avoid the need to bring namespaces - xmlns:* attributes - into html 
serialization). My suggestion was meant as a mean to test RDFa in HTML 
documents without changing the spec (perhaps in conjunction with 
data-xmlns-*, data-xmlns-prefixes="rdfa foaf <whatever>" to "emulate" 
namespaces - an ugly hack, I know, but at least would avoid changes to 
html serialization, at least in a test phase) -- even if I think that 
xml serialization should work better for such rdf metadata.

WBR, Alex
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