[georss] Georss schemas

[Joshua Lieberman]

Brian,

The attribute changes were made last year, but loose organization or  
perhaps just my lack of organization resulted in the error of their  
not being included in the 1.0 freeze. The issue was incorporating  
into the content model the basic class - property -class pattern  
required by both RDF and GML.

There was also discussion of a circle element long ago. The basic gml  
circle is defined awkwardly and a decision was made to exclude it,  
but the CircleByCenterPoint element was pointed out later, so I've  
included it back in for discussion. Other parties have been  
interested in using the gmlgeorss profile with a circle included. I  
haven't proposed taking out the radius property, which can have more  
general uses than just a concrete circle geometry.

As far as backwards compatibility, we need to figure out whether this  
is a corrigiendum of 1.0 or a new version which is backward  
compatible in terms of information, just not in terms of structure.   
In the latter case, we'd probably have separate namespaces for 1.0  
and 1.1 which correspond to two schema locations.

The discussion list and blog are indeed the decision process such as  
it is, but a lot of the work still needs to be done offline, when  
opportunity and whiteboard present themselves.

There is certainly room for discussion of further elements at this or  
any future time. You proposed some and I proposed some a couple of  
months ago and there was some discussion which didn't appear to reach  
a consensus at the time. It can't really be a kitchen sink approach,  
or rather there is always the option of adding elements to atom, but  
there is a pretty long list of interoperability, compatibility, and  
semantic issues to be accounted for in any changes directly to the  
georss model, even if that leaves it inadequate for some purposes.  
I'm happy myself to hash them out as time permits, and it isn't  
always clear that a null response from the mailing list means  
disapproval, lack of enthusiasm, or just lack of time to respond.

Maybe it's time for the first annual GeoRSS Conference?

Cheers,

Josh

On Mar 20, 2007, at 11:47 AM, Knoth, Brian D. wrote: o

> Josh,
>
> At first glance, I can't say I'm excited about breaking backward
> compatibility with the original attributes of georss:where. We have
> incorporated those attributes in our geoRSS feeds.
>
> I'm assuming that this version of georss application profile would  
> have
> a namespace different from the original so that users can continue to
> use the original version, right?
>
> Also, there is a new GML shape (circle). Over the past couple months,
> there has been extensive discussion on this list regarding support for
> different GML elements and also regarding support for time. How did
> gml:Circle get included and not any of the other items of need? (Maybe
> this was decided long before I joined I list...I'm just trying to
> understand the decision process of these types of things).
>
> Regards,
> brian
>
> -----Original Message-----
> From: georss-bounces at lists.eogeo.org
> [mailto:georss-bounces at lists.eogeo.org] On Behalf Of Joshua Lieberman
> Sent: Tuesday, March 20, 2007 11:29 AM
> To: georss at lists.eogeo.org
> Subject: [georss] Georss schemas
>
> Brian, Gregor,
>
> There are an updated / draft GML profile and georss schema posted at
> http://www.georss.org/xml/1.1/ which reflect both cleaning up and a
> change in the way attributes are handled which was necessary for an
> RDF realization. We are behind in updating the website to reflect
> this, but would appreciate your feedback in the meantime.
>
> There isn't an XML schema document for either RSS 2.0 or Atom that I
> am aware of.
>
> Cheers,
>
> Josh Lieberman
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