[georss] "When" information in georss

[Mikel Maron]

I like the formulation of these tags. 

My issue is that the concept of time, in RSS feeds, is not necessarily dependent on location. Do these definitions belong in GeoRSS, or in a TimeRSS namespace.
This has been brought up before, and it's not really an actionable objection, since there isn't any active effort out there to sort out a RSS namespace for time and calendar stuff. 
So my suggestion, if we think these elements are a good start, is to reach out and try to kick start a seperate process around Time. We as a group certainly have the experience to see that through to something usable and widely acceptable.

----- Original Message ----
From: Joshua Lieberman <josh at oklieb.net>
To: georss at lists.eogeo.org
Sent: Tuesday, August 7, 2007 10:44:13 PM
Subject: Re: [georss] "When" information in georss

Tatsuya,

Good suggestion. My thinking is going this way as well. In parallel to georss:where, we can have the two most common time definitions as simple tags, and georss:when with GML elements inside for more involved definitions. I might prefer the terms "georss:timeStamp" and "georss:timePeriod", which would then map exactly onto gml definitions, e.g. for 


<georss:timePeriod>2006-06-16T07:45:00.000Z 2006-06-16T07:45:00.000Z</georss:timePeriod>


<georss:when>
   <gml:TimePeriod >
       <gml:beginPosition>2006-06-16T07:45:00.000Z</gml:beginPosition>
       <gml:endPosition>2006-06-16T07:45:00.000Z</gml:endPosition>
   </gml:TimePeriod>
</georss:when>


or for <georss:timeStamp>2003-02-13T12:28-08:00</georss:timeStamp>


<georss:when>
   <gml:TimeInstant>
    <gml:timePosition>2003-02-13T12:28-08:00</gml:timePosition>
   </gml:TimeInstant
</georss:when>


The reason for adding time to the georss vocabulary would be to specifically locate the "news as feature" in time, rather than some other ambiguous time associated with the creation and transmission of resources and news feeds.


--The issue of grouped and multiple time-space tags is an important, but different and more complicated issue that I'll speak to sometime later.


Cheers,


Josh


Joshua Lieberman
mailto:josh at oklieb.net
tel +1 (617) 630-8609
fax: +1 (815) 717-9818

 

On Aug 7, 2007, at 9:06 AM, Noyori Tatsuya wrote:

I like simple georss. I think we need more simple WHEN element like
the following.


dateTime:
<georss:dateTime>2003-02-13T12:28-08:00</georss:dateTime>


period:
<georss:period>2003-02-13T12:28-08:00 2003-02-13T12:30-08:00</georss:period>




Moreover, I think we need GROUP element for multiple locations and
time like the following.


<georss:group>
  <georss:dateTime>2007-08-07T00:00-08:00</georss:dateTime>
  <georss:point>45.256 -71.92</georss:point>
  <xhtml:div>sunny</xhtml:div>
</georss:group>
<georss:group>
  <georss:dateTime>2007-08-07T03:00-08:00</georss:dateTime>
  <georss:point>45.256 -71.92</georss:point>
  <xhtml:div>cloudy</xhtml:div>
</georss:group>
<georss:group>
  <georss:dateTime>2007-08-07T06:00-08:00</georss:dateTime>
  <georss:point>45.256 -71.92</georss:point>
  <xhtml:div>rainy</xhtml:div>
</georss:group>


If you want to summarize duplicated elements, you can do as follows.


<georss:group>
  <georss:point>45.256 -71.92</georss:point>
  <georss:group>
    <georss:dateTime>2007-08-07T00:00-08:00</georss:dateTime>
    <xhtml:div>sunny</xhtml:div>
  </georss:group>
  <georss:group>
    <georss:dateTime>2007-08-07T03:00-08:00</georss:dateTime>
    <xhtml:div>cloudy</xhtml:div>
  </georss:group>
  <georss:group>
    <georss:dateTime>2007-08-07T06:00-08:00</georss:dateTime>
    <xhtml:div>rainy</xhtml:div>
  </georss:group>
</georss:group>


This is good idea, isn't it?


-- 
Tatsuya
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