[georss] Time and Space

[Knoth, Brian D.]

Mikel,
 
What you say in your second paragraph is exactly what we are looking
for (well, with the addition of time also), but I'm a little confused
by it because I thought that the GML geoRSS was defined to be only
those GML elements defined here: http://www.georss.org/gml.html and not
"any" GML payload. Also, I did not think that multiple ones could be
present in there.
 
Could you give me a specific example of a <georss:where> node with
multiple geometries and is compliant with the GML geoRSS definition?
 
thanks,
brian


________________________________

	From: Mikel Maron [mailto:mikel_maron at yahoo.com] 
	Sent: Monday, February 12, 2007 2:50 PM
	To: Knoth, Brian D.; georss at lists.eogeo.org
	Subject: Re: [georss] Time and Space
	
	
	Brian
	
	There was a thread on this last month that went into the issues
.. http://lists.eogeo.org/pipermail/georss/2007-January/
	
	But I should've been more specific .. you can include any kind
of GML payload in GeoRSS GML, which could have multiple geometries,
	but those all would be included in a single georss:where.
	
	-Mikel
	
	
	
	----- Original Message ----
	From: "Knoth, Brian D." <bknoth at mitre.org>
	To: Mikel Maron <mikel_maron at yahoo.com>; georss at lists.eogeo.org
	Sent: Monday, February 12, 2007 7:41:39 PM
	Subject: RE: [georss] Time and Space
	
	
	Mikel,
	 
	I'll take a look at your links in a moment, but just quickly
wanted to respond to the issue of not being able to have multiple
<georss:where> nodes under an <item>. I know that I read this
restriction somewhere else and my only question is simply why not?  I
don't know of any restriction defined in the RSS specification that
limits child elements to only a single occurrence, is there?
	 
	thanks,
	brian


________________________________

		From: Mikel Maron [mailto:mikel_maron at yahoo.com] 
		Sent: Monday, February 12, 2007 2:38 PM
		To: Knoth, Brian D.; georss at lists.eogeo.org
		Subject: Re: [georss] Time and Space
		
		
		Hi Brian
		
		I'm very interested in incorporating time, visualizing
and acting on change. Gave a presentation outlining some thoughts on
this foss4g..
	
http://www.foss4g2006.org/contributionDisplay.py?contribId=161&sessionI
d=47&confId=1
		
		Like Raj, I think time could be seen as having wider
application than just space. I've re-used the RSS and Atom
time-oriented fields for some
		basic stuff.
		
		http://worldkit.org/doc/time.php
		
		For richer time specifications, there hasn't been
agreement on a single encoding. Upcoming.org has a bit to say on this..
		
	
http://community.upcoming.org/w/index.php/Nerdy_Questions#What_are_the_
guidelines_you_follow_when_creating_RSS_feeds.3F
		
		They're using xCal. There's also an old RSS 1.0 module
called Event .. http://web.resource.org/rss/1.0/modules/event/
		
		
		While writing this I just saw your followup. One thing
about your usage, you can't associate multiple georss:where elements
with a single item;
		it's a one to one relationship. 
		
		Best
		-Mikel
		
		
		----- Original Message ----
		From: "Knoth, Brian D." <bknoth at mitre.org>
		To: georss at lists.eogeo.org
		Sent: Monday, February 12, 2007 1:40:54 PM
		Subject: [georss] Time and Space
		
		
		Hi,
		
		I'm new to this mailing list, yet have been advocate of
RSS and geoRSS
		on some internal projects for a while. I do have a few
concerns with
		regard to real practical acceptance of geoRSS, yet, I
understand the
		need to try and balance simplicity and expressiveness.
As such, we are
		attempting to utilize GML geoRSS, however, we have
needed to extend the
		GML geoRSS with the ability identify time as well as
space. 
		
		I wanted to just send out our approach to doing this to
get comments
		from anyone else who might be interested in this on the
mailing list.
		Simply put, we have added a GML TimePeriod to each of
the geoRSS nodes
		along with the spatial representation. Here is an
example:
		
		<georss:where>
		    <gml:TimePeriod>
		           <gml:begin>2006-06-17T09:55:00Z</gml:begin>
		        <gml:end>2006-06-17T10:30:00Z</gml:end>
		    </gml:TimePeriod>
		    <gml:Point>
		        <gml:pos>37.65356495497155
-114.5048399056895</gml:pos>
		    </gml:Point>
		</georss:where>
		
		All comments would be appreciated.
		
		Regards,
		brian
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