Hello, I see at least two different kind of user-defined metadata that can be associated with files.
1) Tags like labels: "Important", "Personal", "Todo", etc: The public API is under the \OCP\ITags and \OCP\ITagManager PHP interfaces (call \OC::$server->getTagManager()) They can also be set through WebDAV PROPFIND/PROPPATCH on files using the oc:tags attribute (see https://github.com/owncloud/core/pull/12865#issuecomment-67346274 for example queries) Such tags are stored in the database in the table "oc_vcategory" with the type "files" and "oc_vcategory_to_object" maps them to file ids. Currently such tags are only used to set the special "Favorite" tag. There are plans for 8.2 to implement a user interface for arbitrary tags: https://github.com/owncloud/core/issues/16325 Some apps like the Contacts app already have their own tags and use the same OCP API. 2) Key/Value pairs which could also be called attributes or properties: The WebDAV spec allows for setting custom key/value pairs that are associated with files. These are completely unrelated to the tags above and use a different mechanism. Such properties can be set/read using PROPPATCH/PROPFIND: For example a PROPPATCH body: <?xml version="1.0" encoding="utf-8" ?> <D:propertyupdate xmlns:D="DAV:"> <D:set> <D:prop> <foo xmlns="http://example.com/customnamespace <http://webdav.org/cadaver/custom-properties/>"> bar</foo> </D:prop> </D:set> </D:propertyupdate> There is currently no PHP API to set such properties as they aren't used elsewhere and no plans to add any as far as I know. The WebDAV properties are mapped with files in the "oc_properties" table. Hope this helps a bit. Cheers, Vincent On 29.06.2015 21:57, Devin Ceartas wrote: > I am beginning some client-sponsored development work to create a > flexible system for associating user-defined metadata with files in > owncloud. > > My starting point is the favorites plugin > (https://github.com/owncloud/core/blob/64138b0af50dacab4ec8da20406c0131d8dee423/apps/files/js/favoritesplugin.js) > > My intention is to first understand how this plugin is implemented and > be able to mimic it's behavior with alternative meta-data tags. From > there I will work to develop a way to add new meta-data > attributes/tags through a user-interface. > > I would be most thankful for any information relating to past, current > or planned similar features or any other guidance. Thanks. > > > devin > -- > contact info: http://nacredata.com/devin > > Ask me about Google Apps for Work: hosting your domain-branded email, > calendar and cloud storage on Google's infrastructure. > _______________________________________________ > Devel mailing list > Devel@owncloud.org > http://mailman.owncloud.org/mailman/listinfo/devel
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