Hi Peter, All of this is just my opinion, and not necessarily representative of the views of Jolla.
The reason is that SQL is simple, maintainable, and performant. Yes, there are some edges which need to be handled carefully, but in general, sqlite is the perfect solution for this type of data. Nokia tried to break out of the silos by putting all the data into system-ranging semantic-web style RDF-triple or object-relationship datastores (first Tracker and then JSONdb) and both of those projects failed in part due to the unmanageable complexity and poor performance they entail. Even relatively simple projects which rely on Tracker (like data file metadata collectors) are plagued with issues which require in-depth expertise to resolve. Relationships between identified, precisely specified data blobs can be stored separately, and still give 95% of the advantages, without the complexity, using databases and software components which any competent developer can maintain and improve. Cheers, Chris. ________________________________ From: devel-boun...@lists.sailfishos.org [devel-boun...@lists.sailfishos.org] on behalf of Peter Kovacs [legi...@gmail.com] Sent: Thursday, June 02, 2016 5:41 PM To: Sailfish OS Developers Subject: Re: [SailfishDevel] Sailfish OS Open Source Community Collaboration Meeting 2nd of June 2016 I would actually like to know why SQL stuff. Datastructure types I am think of on the Phone are relationships (Facebook style) or transactional. And both are not ideal to solve with relational dbs. I guess the Answer is because every one does it. But that is not really satisfactory. Would there be an interest to use something else? Tone Kastlunger <users.giulie...@gmail.com<redir.aspx?REF=-iBw7uXA9OLgub_XQ6PmWFr-6hphsFm737m9obcptAtksBjSvYrTCAFtYWlsdG86dXNlcnMuZ2l1bGlldHRhQGdtYWlsLmNvbQ..>> schrieb am Do., 2. Juni 2016, 09:33: Hi Chris; >2) API to access Calendar data. Correct, currently we don't provide access to >calendar API in Harbour. The reason is that we want to use QtOrganizer as the >public API, but to do that we need to write a QtOrganizer engine backend >for >mkcal (note that one already existed in QtMobility days, which is open source, >so we can potentially adapt that one with relatively little effort. Help with >that effort would be greatly appreciated). Eventually, I'd like to develop a >>QtOrganizer backend directly in sqlite, for performance and maintainability >reasons (mkcal has several design and implementation problems, in my opinion), >at which point QtOrganizer can become the platform API (not just the 3rd >>party API). I guess the worload to push it all the way to QtOrganizer requires scratching the existing backend / rewriting a big part of the cal app? On Thu, Jun 2, 2016 at 5:06 AM, Chris Adams <chris.ad...@jolla.com<redir.aspx?REF=deJCzfiOx-jvej5YNQ4WSlHacIB3WdSiiaILDZE3Z4dksBjSvYrTCAFtYWlsdG86Y2hyaXMuYWRhbXNAam9sbGEuY29t>> wrote: Hi everyone, I will try to be at the meeting tonight, but I cannot promise (it's held at 11:30 pm in my timezone). A couple of the questions relate to areas I am involved with, so I'll try to provide some information in case I don't make it to the meeting. If you have any follow up questions or discussion, feel free to contact me directly via email or on Freenode IRC (chriadam is my nick). 1) Contact Note details. This is tracked internally by JB#14734. As you mentioned, it's supported in the backend, but not in the People app UI. It was on going to be part of the apps overhaul which was planned prior to the financial difficulties last year, and since then this has fallen off the radar. It requires design input, because you can have multiple Note details in a single contact. I've just pinged our lead designer in the bug report again, in case he can fit it in sometime soon. 2) API to access Calendar data. Correct, currently we don't provide access to calendar API in Harbour. The reason is that we want to use QtOrganizer as the public API, but to do that we need to write a QtOrganizer engine backend for mkcal (note that one already existed in QtMobility days, which is open source, so we can potentially adapt that one with relatively little effort. Help with that effort would be greatly appreciated). Eventually, I'd like to develop a QtOrganizer backend directly in sqlite, for performance and maintainability reasons (mkcal has several design and implementation problems, in my opinion), at which point QtOrganizer can become the platform API (not just the 3rd party API). 3) Email app development. Yes, you're absolutely right that the Email application hasn't received much development effort since Valerio unfortunately left. Yes, I would personally like to see it (along with other apps like Clock, Notes, and Calendar) opensourced. No, I don't know what the status of the opensourcing discussions with the Board Of Directors is, so I cannot give a roadmap for that possibility. However, the "engine" of the email application is already open source (except for the Exchange/ActiveSync plugin) - we use QMF (Qt Messaging Framework) for email handling. See https://git.merproject.org/mer-core/qmf<redir.aspx?REF=hqysm6L_GokOpJBPNuxx7d9wFhpjbvWTgqj51W5ezkdksBjSvYrTCAFodHRwczovL2dpdC5tZXJwcm9qZWN0Lm9yZy9tZXItY29yZS9xbWY.> and https://git.merproject.org/mer-core/messagingframework<redir.aspx?REF=LjjXVlEbhZKuGlUfXjsDpiRLoJnLHeoEeki4NIbMnbdksBjSvYrTCAFodHRwczovL2dpdC5tZXJwcm9qZWN0Lm9yZy9tZXItY29yZS9tZXNzYWdpbmdmcmFtZXdvcms.> etc for that stuff. Speak to Matt Vogt (mvogt on Freenode IRC) for code reviews etc. In general, the Sailfish OS wiki has been updated with a lot of information about the various software components which make up the Sailfish OS stack (including links to the open-source repositories), so you should be able to find most of the information you need to help develop these components, from reading https://sailfishos.org/wiki/Core_Areas_and_APIs<redir.aspx?REF=8mMFTRKKEOxMeyL0UWaTnk3nvBWOb6hu1PMVbYiDsIRksBjSvYrTCAFodHRwczovL3NhaWxmaXNob3Mub3JnL3dpa2kvQ29yZV9BcmVhc19hbmRfQVBJcw..> and the drill-down links from that page. Finally, I don't know much about Bluetooth, but I know that we're looking at updating to Bluez 5 right now (development is currently ongoing to port the Qt stack across, possibly by using the KDE bluez-qt wrappers), so it's possible that the tethering issue will be addressed as part of that, with the new stack - but again, that's not my area so I might be incorrect. Cheers, Chris. ________________________________ From: devel-boun...@lists.sailfishos.org<redir.aspx?REF=RBXzpNXxC9REb_MRal1AytX-5ovj8ARS5TfE0LiWzQVksBjSvYrTCAFtYWlsdG86ZGV2ZWwtYm91bmNlc0BsaXN0cy5zYWlsZmlzaG9zLm9yZw..> [devel-boun...@lists.sailfishos.org<redir.aspx?REF=tcPN2NRwencPvVBtBcBrVqKwhFgkYqT3gR8IQEwGAf_EERvSvYrTCAFtYWlsdG86ZGV2ZWwtYm91bmNlc0BsaXN0cy5zYWlsZmlzaG9zLm9yZw..>] on behalf of James Noori [james.no...@jolla.com<redir.aspx?REF=FUL-qqJZssahJzV7TsYbh6vbcMDB0Eg2Ya_IDddoJdjEERvSvYrTCAFtYWlsdG86amFtZXMubm9vcmlAam9sbGEuY29t>] Sent: Wednesday, June 01, 2016 11:15 PM To: devel@lists.sailfishos.org<redir.aspx?REF=S5wfX0OlT70Pk42hEaAXAT9UtzKrYQZnGXoYGHtXSKHEERvSvYrTCAFtYWlsdG86ZGV2ZWxAbGlzdHMuc2FpbGZpc2hvcy5vcmc.> Subject: [SailfishDevel] Sailfish OS Open Source Community Collaboration Meeting 2nd of June 2016 Hi everyone! Following up last week’s postponed Community collaboration meeting on IRC, this week’s meeting is going to be held at the agreed time and date, 2/6/2016 at 13:30 UTC. Please see this link for your local time (Redirects to timeanddate.com<redir.aspx?REF=-DGzsmwu1cyk7yG3A43bMMLx1Z03QGNxFR5c2fG1I8PEERvSvYrTCAFodHRwOi8vdGltZWFuZGRhdGUuY29t>) : http://bit.ly/247PwwT<redir.aspx?REF=iuLPomMDqngFtjqTT3hFHMoDizUGILs3-67DOHBVpv7EERvSvYrTCAFodHRwOi8vcmVkaXIuYXNweD9SRUY9ZzVqLXk5Ym5VMlZJbGRabk9ucjhDUzctYlNQT0d3LTFBTUp3RXZNbGp2UWpMTURfZ1lyVENBRm9kSFJ3T2k4dlltbDBMbXg1THpJME4xQjNkMVEu> Location: #mer-meeting on Freenode IRC Chairperson: Jaymzz Duration: Approximately 100 minutes. Thanks to everyone who has responded and added topics on TJC: https://together.jolla.com/question/54157/sailfishos-open-source-collaboration-meeting-planning/<redir.aspx?REF=xbTHaq5TZP771rM8ecCf3pzn7ismmJLnZ4Tvnf5ce2nEERvSvYrTCAFodHRwOi8vcmVkaXIuYXNweD9SRUY9T2xSQlRXX3J3b2FDa185Rk9vclY3bVpyWGFiZVdVUDdqblp5U002OUU3d2pMTURfZ1lyVENBRm9kSFJ3Y3pvdkwzUnZaMlYwYUdWeUxtcHZiR3hoTG1OdmJTOXhkV1Z6ZEdsdmJpODFOREUxTnk5ellXbHNabWx6YUc5ekxXOXdaVzR0YzI5MWNtTmxMV052Ykd4aFltOXlZWFJwYjI0dGJXVmxkR2x1Wnkxd2JHRnVibWx1Wnk4Lg..> Proposed topics: - Intro (5min) - Bluetooth tethering - status of the fix (20min) - 2016 roadmap (15min) - Show notes of contact (opensource contact app?) (15 min) - API to access calendar (15 min) - Email app development (15 min) - Requesting things to be added to mer-tools repo (5 min) - General Discussion (5-10 min) Please familiarize yourself with the topics before the meeting, as well as the common Meetbot commands https://wiki.debian.org/MeetBot<redir.aspx?REF=Pnn59UDvjLU_YQb2i3MzWxtyL4lUZDJqfAAHo5tLBG_EERvSvYrTCAFodHRwOi8vcmVkaXIuYXNweD9SRUY9OWJmbGZDeVNPZjRsOFZ4UGhoTGU0cmxfOENYMFY1MUVnaHVzbjVqVFJOSWpMTURfZ1lyVENBRm9kSFJ3Y3pvdkwzZHBhMmt1WkdWaWFXRnVMbTl5Wnk5TlpXVjBRbTkw> (it's used for meeting management and logging) Best regards, James Noori, Community Manager at Jolla _______________________________________________ SailfishOS.org Devel mailing list To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org<redir.aspx?REF=iIu21c5TALDEeZ00sDLKisv3BGPPsy13xH4I9z_SvIbEERvSvYrTCAFtYWlsdG86ZGV2ZWwtdW5zdWJzY3JpYmVAbGlzdHMuc2FpbGZpc2hvcy5vcmc.> _______________________________________________ SailfishOS.org Devel mailing list To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org<redir.aspx?REF=iIu21c5TALDEeZ00sDLKisv3BGPPsy13xH4I9z_SvIbEERvSvYrTCAFtYWlsdG86ZGV2ZWwtdW5zdWJzY3JpYmVAbGlzdHMuc2FpbGZpc2hvcy5vcmc.> -- Disclaimer: Diese Nachricht stammt aus einem Google Account. Ihre Antwort wird in der Google Cloud Gespeichert und durch Google Algorythmen zwecks werbeanaöysen gescannt. Es ist derzeit nicht auszuschließen das ihre Nachricht auch durch einen NSA Mitarbeiter geprüft wird. Durch kommunikation mit diesen Account stimmen Sie zu das ihre Mail, ihre Kontaktdaten und die Termine die Sie mit mir vereinbaren online zu Google konditionen in der Googlecloud gespeichert wird. Sollten sie dies nicht wünschen kontaktieren sie mich bitte Umgehend um z.B. alternativen zu verhandeln.
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