#topicmaps@irc.freenode.net log for 2006-03-24

This log is automatically generated by an IRC bot from the traffic on the #topicmaps IRC channel on the irc.freenode.net IRC server. This file has the traffic for 2006-03-24. If you have questions regarding this log, please contact larsga@ontopia.net.

00:01:44 grove_ grove_ has quit None (Remote closed the connection)
00:14:47 larsbot larsbot has quit None ("This computer has gone to sleep")
01:17:01 ocr afidel access-list inside_access_out tcp from any to host x.x.x.x eq 25
01:17:07 ocr or something
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07:57:23 arnarl mornin'
08:18:42 drrho hi all!
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09:56:21 drrho * drrho -> theatre (sort of, we are in Australia)
10:00:18 larsbot :-)
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13:27:49 lheuer Hi there. :)
13:28:07 larsbot hey ho
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15:07:41 uebera||_away uebera||_away is now known as uebera||
15:08:56 lheuer Hi Markus! :)
15:09:03 uebera|| Hi, Lars! :)
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15:54:47 lheuer Did anybody created a DoS attack via mergeMap yet?
15:56:13 larsbot don't know of anyone who allows outsiders to submit TM fragments
15:56:17 larsbot so that makes it hard
15:57:30 larsbot to execute the attack, I mean
16:00:58 lheuer Jep. The user has to execute the initial XTM parsing process but then it is possible to either create an endless loop or to serve the topic map that should be merged very, very, very slow so that the application blocks.
16:01:23 arnarl heh, sending in a document with a single topic that contains all the identifiers in the map :-)
16:01:45 arnarl like watching a galaxy being sucked into a black hole
16:01:54 lheuer :))
16:12:12 lheuer The possibility to unmerge topic maps will be become more important, once Topic Maps has left its micro cosmos.
16:16:01 arnarl source-locators :-)
16:16:06 arnarl that and transactions
16:20:24 larsbot transactions help against the blocking problem
16:20:50 larsbot but the endless loop you can create if you make it point back to some kind of service that keeps providing new URLs for every iteration
16:22:23 arnarl oh, I didn't think about that
16:22:42 arnarl fetching resources like that is a bit nasty.
16:22:46 larsbot yes
16:23:10 lheuer Wouldn't DoS attacks beeing a good argument to remove the mergeMap element from an *interchange* syntax?
16:23:25 larsbot feel free to try :-)
16:23:38 arnarl We didn't even bother to implement it :-)
16:23:51 larsbot gra and I have tried arguing this for a long time, and got nowhere
16:24:07 arnarl http://www.garshol.priv.no/blog/28.html <-- wow :-)
16:24:19 larsbot in any case, I think probably people would reply that there's no reason why you can't disable mergemap in certain situations
16:24:22 arnarl and a waiting list :-)
16:24:23 larsbot and I guess they would be right
16:24:31 larsbot arnarl: :-)
16:24:59 arnarl the problem with all such features is that even if you do not support them you still need to account for them.
16:25:12 arnarl makes the whole infrastructure more complex
16:25:27 arnarl and complexity we do not need more of with Topic Maps.
16:25:45 lheuer I've a flag to indicate if the mergeMap element should be ignored or not. But don't offer mergeMap would be the easiest solution
16:26:53 arnarl I like the comparison with US population numbers, but it is even better because a sizable portion of the conference is in Norwegian.
16:27:06 arnarl not exactly a world language compared to english.
16:27:07 larsbot * larsbot dreams of TM conferences in China :-)
16:27:35 arnarl just don't point out the freedoms TM afford you. :-/
16:27:37 larsbot complexity: I agree; things would be much easier without it
16:27:43 larsbot freedoms: LOL
16:27:59 larsbot but mergemap is something people really use
16:28:04 larsbot so cutting it entirely is a bit harsh
16:28:23 larsbot kal's proposal to have a separate TM packaging syntax has a lot of merit
16:28:34 larsbot the only real problem is that it's a bit late in the day for that
16:30:46 arnarl aren't you doing XTM 2.0 now?
16:33:11 larsbot yes, that's where we might cut it
16:48:51 arnarl bye bye, have a nice weekend everybody! :-)
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