XSF Discussion - 2016-12-28

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07:11:42 ralphm Tobias: only one child element is allowed.
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08:36:12 Tobias Why is that?
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08:43:32 Tobias ralphm, where does it say so in XEP-0060?
08:48:31 ralphm Well, 7.1.3.5.
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08:50:09 ralphm And the schema. maxOccurs defaults to 1.
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08:55:18 Tobias wonder what the reason was for that restriction
08:55:43 ralphm There was a lot of debate on this when we specced this, but consensus was that a single element made the most sense.
08:56:52 ralphm Treating a single thing is easier than multiple things that belong together somehow. If you need additional grouping, you can use a wrapper element.
08:58:48 Tobias so the recommendation is to do <item><entry><x>here the two elements</x><entry></item>
08:59:30 ralphm Yeah. Do you have a concrete use case for multiple elements?
09:00:48 ralphm Actually, <entry/> is your wrapper, and x might appear twice.
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09:06:01 Tobias see the conversation of goffi and myself yesterday...the idea was to attach info to a pubsub atom item about the images mentioned in the item https://q.zash.se/5e4d0b8702c3.txt
09:06:37 Tobias so that a receiver would get further hints where to fetch the image ni:///sha3-256;wqfDv8OGw7jCvx7Dl2ZRw4FHVsKgYcOWYsO14oKsw79Nw6Q7ScO64oCaw5gKS-KCrMO4Q0o from
09:07:34 Tobias but since the new stanza isn't part of atom i'd have to create a new entry type, that allows atom and other children
09:09:17 goffi ralphm: indeed the issue there is that entry is from atom namespace, while <reference> and <media-sharing> are XMPP
09:09:32 goffi and XEP-0277 already use <entry> as item child
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09:10:41 ralphm Why not include the meta-data inside the Atom element document?
09:11:30 ralphm Atom allows for arbitrary child elements
09:12:00 Tobias it does? that would work for me
09:12:12 Tobias goffi, what's your opionion on that?
09:12:46 goffi I didn't knew it allows arbitraty element, in this case it works for me to
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09:13:05 Tobias great :)
09:13:10 goffi https://tools.ietf.org/html/rfc4287#section-6.1
09:13:13 goffi neat
09:13:19 goffi thanks ralphm, didn't knew that
09:13:49 Tobias ralphm, thx for the hint
09:13:50 ralphm https://tools.ietf.org/html/rfc4287#section-4.1.2
09:13:59 ralphm Right
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09:17:49 Ge0rG I remember another usecase for multiple items was concurrent update of bookmarks
09:20:15 ralphm The trouble with concurrent updates or batching is that error handling becomes more complex. This is why batch functionality has been removed in various parts of XEP-0060.
09:20:56 ralphm If you still want that, you can handle it in your application-specific code.
09:21:17 Ge0rG it shouldn't be too hard to edit different items from different clients. but if everything is stored in the same item, race conditions have a more severe effect.
09:23:01 ralphm That's more a problem with how bookmarks work, rather that PubSub itself
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09:39:33 goffi Ge0rG, ralphm: we (with edehlas and chris deering) have started to work on a new protoXEP for bookmarks, which would actually be a general list of uri, you can check https://lite5.framapad.org/p/OlHwr5GBlY
09:39:50 goffi one of the goal is to fix the one item for all issue
09:40:04 goffi the other is to have correct handling of non MUC uri
09:40:10 goffi and also nice things like tags
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09:42:27 goffi it cool be use not only for bookmark, but anywhere where a list or uris if useful
09:42:33 goffi could*
09:44:26 goffi is a bit stalled at the moment because we are all busy, be we could defenitely propose a first protoXEP quickly
09:46:18 ralphm goffi: right. Cool
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11:18:39 edhelas hey, I'm at the 33c3, if someone else is here, ping me, would be nice to meet :)
11:23:01 Ge0rG edhelas: Link Mauve and daniel should be there, somewhere
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11:37:43 Link Mauve mathieui, edhelas, daniel, Tobias, kalkin, I’m around Saal G, just finished eating.
11:37:49 Link Mauve And you?
11:38:02 Tobias just on my way to the CCH
11:38:37 kalkin and Daniel are going too hall 2
11:38:50 kalkin We are around saal g right now too
11:39:08 edhelas I'm in the hacker room, just in front of the TARDIS and the wooden dome
11:39:26 Link Mauve kalkin, where around Saal G?
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11:40:24 Link Mauve Had a chat with koolfy, about OTR and OX and OMEMO and related as well as unrelated stuff. ^^
11:40:50 kalkin Link Mauve: I'm currently outside where in the direction of saal1
11:41:51 Link Mauve For hacking the world?
11:42:04 kalkin The stairs down past the digital courage shop and right
11:42:26 mathieui that threema talk was a bit disappointing, btw
11:42:50 mathieui although there are some nice ideas on trust that could work even without their central server
11:43:31 kalkin Link Mauve: Welcome to the Anthropocene? Wednesday, December 28, 2016 1:00 PM, Saal2
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14:13:58 Tobias edhelas: so where are you about?
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14:19:33 edhelas Tobias, I'm at the Raumzeit Labor table in the dev room
14:20:18 Tobias edhelas: let me see if I can find that
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19:35:03 Tobias goffi, so the example would look something like this http://ayena.de/files/xeps/sims.xhtml#usecases-microblogging
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