Re: Working on draft iCalendar RDF-schema

Hi Michael

The UML version of this you did was an excellent tool. I spend most of
the weekend writing a full RDF schema for iCalendar (which I have not
yet checked against various things I should have, e.g. XML schemas, Tim
Berners-Lee's "A quick look at iCalendar"; also the DAML work on
datatypes, DAML-S on date instants and durations, the ABC modelling work
some colleagues of mine have been doing and the RSS event model.) My
intention is to do a comparison of the various event models and
approaches in these different models by creating instance data that
conforms to them. I wanted to have a go at the full iCalendar schema to
get an overview of the way it works.

Perhaps we can collaborate on this - it's always good to have different
perspectives on things like this. So if it's any help to you, the
annotated draft schema is at

http://ilrt.org/discovery/2001/06/schemas/ical-full/index.rdf

I think Aaron is right about the approach to modelling - that's what
I've tried to do.

all the best

libby

On Mon, 11 Jun 2001, Michael Arick wrote:

> Hi there:
> 
> I've started working on a first draft of an RDF-schema to represent 
> "all" the information in a standard iCalendar data file.   At first, I 
> was looking for ways to convert my UML diagrams automatically to RDF, 
> but I'm pretty sure that's a lost cause because I didn't know much about 
> RDF before I made the UML, and it's in a pretty incompatible format 
> (sorry... Dia isn't really a good UML tool...).
> 
> Anyway, I'm a bit stuck on one little issue, and I was wondering if any 
> of you have some ideas on this.
> 
> Properties in iCal have values (and parameters that can be set on them). 
>  Sometimes, they have types that make these values easy to define, but 
> other times, you have choices for value type (such as Date-Time vs. 
> Date, but there are others).  
> 
> I'm not entirely sure how to represent this kind of choice in RDF.  Any 
> ideas or pointers to full RDF-schemas I could look at?
> 
> -Michael Arick
> 
> 
>