Monday, 26 January 2009

Thank you VideoLectures

I have been reading specifications and searching for tutorials trying to understand OWL-S, WSMO and IRS II. However I wasn't confident about what I've learned. Recently, I found these lectures on OWL-S,WSMO and IRS II.

What is really good is that the lectures are from the people who wrote these specifications so you can trust it.
Because it is a presentation they focused on how their work fits in the big picture and explained things assuming an audience with little prior knowledge.

The videos are from lectures accompanying ISWC 2007.

Thursday, 22 January 2009

Presto!

So how similar are you Presto?

Let's see:

Similarities
-They have the same URI structure.
-They use GET to query, POST to add assertions
-They have suggested content negotiation
-They discussed calculated resources. As “Identifiable Query Results” but I am not sure if they are added to the original ontology.

Differences
-They designed it from knowledge management perspective, not a Web Services perspective. So they didn’t discuss transactions.
-I think it is an alternative approach to something called Openlink Virtuoso which deploys linked date, but I am not sure.
-Presto is a server you send the ontology to it. I imagined our proposed idea more like a plug-in to the server. Usually a Web Service is provides an interface to an existing strong infrastructure: like a server to deal with high throughput and a back-end database that deals with high load.
-They don’t discuss using PUT and DELETE.
-Redirection issues are not discussed.