>>>Actually, as I recall, last time this came up (proposed by Walter >>>Underwood), someone pointed out accurately that RSS2 has had this >>>functionality for a long time and that nobody ever really implemented >>>it; thus there was a strong vote from experience against such a >>>feature. -Tim<<<
There is no RSS2 feature I can see that allows feed providers to tell aggregators the minimum refresh period. There's the ttl tag. That was, I believe, introduced for a different purpose and determines the Maximum time a feed should be cached in a certain situation. The tag's usage has morphed over time and, if more than 60 minutes, I assume it's a Minimum time; but it's not surprising if feed providers are wary of using the tag in this way. What has yet to be tried is a specific tag in the core feed standard that promotes and determines good behaviour for aggregators refreshing their feeds. Even if it were to prove only a limited benefit, it would still be a benefit. Andy
