XSF Discussion - 2016-12-28

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  82. ralphm Tobias: only one child element is allowed.
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  100. Tobias Why is that?
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  106. Tobias ralphm, where does it say so in XEP-0060?
  107. ralphm Well,
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  112. ralphm And the schema. maxOccurs defaults to 1.
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  117. Tobias wonder what the reason was for that restriction
  118. ralphm There was a lot of debate on this when we specced this, but consensus was that a single element made the most sense.
  119. 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.
  120. Tobias so the recommendation is to do <item><entry><x>here the two elements</x><entry></item>
  121. ralphm Yeah. Do you have a concrete use case for multiple elements?
  122. ralphm Actually, <entry/> is your wrapper, and x might appear twice.
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  125. 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
  126. Tobias so that a receiver would get further hints where to fetch the image ni:///sha3-256;wqfDv8OGw7jCvx7Dl2ZRw4FHVsKgYcOWYsO14oKsw79Nw6Q7ScO64oCaw5gKS-KCrMO4Q0o from
  127. 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
  128. goffi ralphm: indeed the issue there is that entry is from atom namespace, while <reference> and <media-sharing> are XMPP
  129. goffi and XEP-0277 already use <entry> as item child
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  131. ralphm Why not include the meta-data inside the Atom element document?
  132. ralphm Atom allows for arbitrary child elements
  133. Tobias it does? that would work for me
  134. Tobias goffi, what's your opionion on that?
  135. goffi I didn't knew it allows arbitraty element, in this case it works for me to
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  137. Tobias great :)
  138. goffi https://tools.ietf.org/html/rfc4287#section-6.1
  139. goffi neat
  140. goffi thanks ralphm, didn't knew that
  141. Tobias ralphm, thx for the hint
  142. ralphm https://tools.ietf.org/html/rfc4287#section-4.1.2
  143. ralphm Right
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  146. Ge0rG I remember another usecase for multiple items was concurrent update of bookmarks
  147. 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.
  148. ralphm If you still want that, you can handle it in your application-specific code.
  149. 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.
  150. ralphm That's more a problem with how bookmarks work, rather that PubSub itself
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  154. 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
  155. goffi one of the goal is to fix the one item for all issue
  156. goffi the other is to have correct handling of non MUC uri
  157. goffi and also nice things like tags
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  159. goffi it cool be use not only for bookmark, but anywhere where a list or uris if useful
  160. goffi could*
  161. goffi is a bit stalled at the moment because we are all busy, be we could defenitely propose a first protoXEP quickly
  162. ralphm goffi: right. Cool
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  187. edhelas hey, I'm at the 33c3, if someone else is here, ping me, would be nice to meet :)
  188. Ge0rG edhelas: Link Mauve and daniel should be there, somewhere
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  195. Link Mauve mathieui, edhelas, daniel, Tobias, kalkin, I’m around Saal G, just finished eating.
  196. Link Mauve And you?
  197. Tobias just on my way to the CCH
  198. kalkin and Daniel are going too hall 2
  199. kalkin We are around saal g right now too
  200. edhelas I'm in the hacker room, just in front of the TARDIS and the wooden dome
  201. Link Mauve kalkin, where around Saal G?
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  203. Link Mauve Had a chat with koolfy, about OTR and OX and OMEMO and related as well as unrelated stuff. ^^
  204. kalkin Link Mauve: I'm currently outside where in the direction of saal1
  205. Link Mauve For hacking the world?
  206. kalkin The stairs down past the digital courage shop and right
  207. mathieui that threema talk was a bit disappointing, btw
  208. mathieui although there are some nice ideas on trust that could work even without their central server
  209. kalkin Link Mauve: Welcome to the Anthropocene? Wednesday, December 28, 2016 1:00 PM, Saal2
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  267. Tobias edhelas: so where are you about?
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  270. edhelas Tobias, I'm at the Raumzeit Labor table in the dev room
  271. Tobias edhelas: let me see if I can find that
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  371. Tobias goffi, so the example would look something like this http://ayena.de/files/xeps/sims.xhtml#usecases-microblogging
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