[rdfweb-dev] The toolset issue

[Joel De Gan]

Julian,
120k is going to be a long-shot for the drupal people for a sub-lib.
http://peoplesdns.com/xml/rdfdump.php (output)
is the part I am adding to the little parser I made (that is the output
from a rdf->triples class that un-modified is less than 45k and is half
comments, it is parsing
http://www.wasab.dk/morten/blog/archives/author/mortenf/foaf.rdf ) 
This is originally from http://phpxmlclasses.sourceforge.net/ which is
not half bad for doing just stright to triples parsing.
If a lot of work decides to start happening on RAP you are going to end
up just keeping your lib up to date all the time.
Anyway..
-joeldg

On Tue, 2004-06-08 at 05:47, Julian Bond wrote:
> I did some digging around in RAP and Morten's code last night. If we're 
> looking at including it in something like Drupal then we can chuck out 
> RDQL support, all the database stuff, all the N3 stuff and the RDF to 
> XML serialisers. That gets you down to 13 files and 144Kb. It's a matter 
> of minutes to combine what's left into two files. A few more minutes to 
> remove all the copious comments and it's two files and 120Kb. That's not 
> so bad. RAP's only getting version updates every 6 months or so, so 
> staying in step wouldn't be hard.
> 
> In this case, the important timings in Morten's work are 25 secs for 
> full RAP and 17 secs for Morten's cut down version. The 25% difference 
> is all in replacing an array of triples as objects against a simple 
> array of triples as arrays. But in the process you also chuck out the 
> RAP API which means considerably more code to actually do useful work 
> with the results. The remaining 17 secs vs 2.7 secs for Redland is 
> entirely basic RDF parsing in PHP vs C. At this point, we're stuck with 
> either trying to completely re-write the RDF parser, switching to 
> Redland or just putting up with the performance. There maybe some 
> performance to be had in optimising RAP's basic parser but that's beyond 
> me.
> 
> I've got some big FOAF files so I'll try and get some real world timing 
> on how long RAP takes to build the triple array and index it.
-- 
joeldg - developer, Intercosmos media group.
http://lucifer.intercosmos.net