W dniu 2012-03-12 21:23, Jason Zurawski pisze:
Hi Freek/All;
On 3/12/12 2:16 PM, thus spake Freek Dijkstra:
Jason Zurawski wrote:
I came to realise that lifetime and version are two different concepts.
A lifetime signifies a duration (e.g. of a reserved link), while a version is a sequence number to track updates of a 'document' (where 'document' is a network description).
then why not use the versioned namespace? Thats why we put versions in namespaces?
<nml1:topo />
<nml2:topo />
I did not mean versioning of the schema, but versioning of the (topology) instance.
E.g.
F: "Hey guy's, this is my latest network!"
<nml:topo id="freekishnet" version="2012-03-12"> <!-- awesome stuff --> </nml:topo>
(... After a well deserved night's sleep ...)
F: "Hey guys, I added a unloaded swallow to my network today, totally putting yesterday's network in shame!"
<nml:topo id="freekishnet" version="2012-03-13"> <!-- even more awesome stuff --> </nml:topo>
It has the same identifier, but because it has a different version, you know which one is the latest-and-greatest.
This still seems like a lifetime to me:
<nml:topo id="freekishnet"> <lifetime> <start>Sun Mar 11 13:25:33 EDT 2012</start> <end>Mon Mar 12 17:20:00 EDT 2012</end> </lifetime> <!-- awesome stuff --> </nml:topo>
<nml:topo id="freekishnet"> <lifetime> <start>Mon Mar 12 17:20:00 EDT 2012</start> <!-- lack of end or duration means current? --> </lifetime> <!-- more awesome stuff --> </nml:topo>
It becomes explicit that one has a shelf life, and the other is ongoing. With 'version' you are left with an arbitrary mark that something is different (and it may be the case that its a date, but it could be just '1' or '2a'). If we see the later being more common, I suppose the use case is different and in this case we may want both to be allowed.
I'm also thinking that the lifetime element can be used for versioning. <start> may be misleading but I would accept having the optional timestamp element inside the lifetime <lifetime> <timestamp>Mon Mar 12 17:20:00 EDT 2012</timestamp> </lifetime> Roman
-jason _______________________________________________ nml-wg mailing list nml-wg@ogf.org https://www.ogf.org/mailman/listinfo/nml-wg