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Paul Sumner Downey wrote: > This nicely exposes some of the key issues in > XML data interchange: ... > 3) something which is quintessentially pub-sub ends up using > polling. At PubSub.com, we're trying hard to make publish/subscribe for XML a much more common thing than it has been. The first area we're working in is XML formatted blog data which people have traditionally polled for. Come visit us at http://weblogs.pubsub.com/ and you can "subscribe" to get custom RSS feeds built in real-time based on filtering against the more than 1 million RSS publishers that we currently scan in real time. At http://elections.pubsub.com/ you can see some examples of feeds we generate in response to subscriptions. If you want to have your results pushed to you (i.e. more like tradition publish/subscribe) check out the interface described at http://pubsub.com/REST/ ). It's pretty rough now, but will improve as we get some testing done. Also, we'll be offering SOAP, XMLRPC, email, etc. as delivery/notification mechanisms in the future. bob wyman
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