[FIXED] GEXF and timestamps

[admin]

Hi all,

In GEXF a date can be encoded in 2 different types :
* the international standard date YYYY-MM-DD = discrete time
* a float = continuous time

I realize that it may be very useful to add a third one: timestamp.

What do you think about it?

[jbilcke]

Hi,
I agree with this addition, which should be easy to implement for most GEXF clients (and faster to parse and check for semantic corectness than the date string, when dealing with hundred of thousands of entries).

[trumpets]

Hi All !

I'm rather new to the forums and Gephi, but once I found out about your project via you winning the Duke award I was immediately hooked

I already incorporated Gephi into my MSc thesis and I could not thank you enough for the great tool you have!

On to my question: Timestamps!

I noticed that the last post in this topic is from a month ago, so I was wondering, what is the progress on Timestamps in dynamic graphs in GEXF ? The thing is that I do real time network monitoring and I am logging everything (!!!) in the GEXF file of my network, and events happen almost every second!

I have created a workaround, which is using discrete time, which is actually the date and time converted in seconds (manually, by my GEXF generator), but that kind of feels dirty I would really like to be able to just stick with plain normal timestamps

Again, many congratz for your award and great tool and please let me know your thoughts and progress on this issue!



Best,
I

[admin]

Hi,

Thanks for your support! Some changes should be made in the current GEXF format (which is a draft), also by supporting Timestamps. I plan to work on it during the next month.

You can help us by sharing your experience of Gephi and the dynamics, and participating in the forum! We'll continue to put our efforts on it this year, and study some practical usages with researchers by participating in some workshops like this one.

cheers,
Seb

[admin]

I'm not sure what kind of timestamp we are talking about. Two definitions exists :

* Unix Time, the number of seconds since 00:00:00 UTC on January 1, 1970
* dateTime defined in XSD Schema and ISO 8601

They serve different purposes: Unix Time certifies an exact point in time, while dateTime has a precision in seconds.

[admin]

Final decision: GEXF will support xsd:dateTime to be consistent with XML data types.

[galwarion]

Code: Select all

		 <attvalues>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="9" start="2011-03-22T07:30:17+01:00" end="2011-03-22T09:30:17+01:00"/>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="7" start="2011-03-21T22:46:32+01:00" end="2011-03-22T07:30:17+01:00"/>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="5" start="2011-03-21T22:38:31+01:00" end="2011-03-21T22:46:32+01:00"/>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="3" start="2011-03-21T22:37:49+01:00" end="2011-03-21T22:38:31+01:00"/>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="1" start="2011-03-21T22:33:38+01:00" end="2011-03-21T22:37:49+01:00"/>
			        <attvalue for="3cef13eb-db7c-4695-a1e4-7f1177927e5c" value="0" start="2011-03-21T22:29:33+01:00" end="2011-03-21T22:33:38+01:00"/>
			 </attvalues>

Which version of Gephi supports xsd:datetime? I dont want to waste my time with source compilation if it havent been implemented yet... Upper code is not working for me in Gephi 0.7b. With UTC settings (Z) on the end is it ok...

[admin]

It will be ready in Gephi 0.8 alpha.

[galwarion]

Gephi 0.8 has been already to download, so there hasnt been this feature yet? Well we recompiled gexf4j to support datetime and only UTC time zone and it works .