Hi, As I don't feel that there is a real solution how to handle notes and kcal items in akonadi and nepomuk. I'm going to explain here how I plan to implement the interaction between aknoadi::items and nepomuk::resources in my application.
I know there is some work going on in Baske/Semnotes/Kjots and the issue has been discussed before focusing on notes. But as I couldn't find a real conclusion on the ml, and since I have some more requirements/usecases, I think it is time to continue this discussion =) Usecase: My application manages Incidences (todos/events) and Notes using the KCal and Akonotes resource in akonadi. (I do believe that storing those in akonadi is the right way, and storing them in nepomuk is not a valid option for various reasons). I organize all items using PIMO::Topics (instead of collections inside akonadi). Further I plan to add functionality to associate random data (files, websites, mails, ...) with the topics and/or a certain Akonadi::Item using Nepomuk. One functionality which showed some further requirements, is converting i.e. a note to an incidence. This made me realize that I'm normally actually tagging the Content of the note/event/todo and not i.e. todo itself. All of this lead me to the following conclusion how to handle those items in Nepomuk: For each Akonadi::Item I create a Nepomuk::Resource (Content Resource) of the type NFO:HtmlDocument (since it is only the content, not the task itself) with an identifier consisting of an application-specific prefix + akonadi::item url (to avoid conflicts with the items generated in the nepomukfeeder agents). For all annotations I use the pimoThing (Content Thing), on which I set the type PIMO:Document. (See the attached diagram for reference) So if I convert the item i.e. from note to todo, which means deleting the old Akonadi::Item and creating a new one, I simply set the new Nepomuk::Resource (created with the new akonadi::item url) as a groundingOccurence of the existing Pimo:Document. This way all annotations remain untouched. The obvious downside of this is, that other applications do not profit from annotations made in my application, and I am not yet sure how to overcome this. Maybe I can annotate the Nepomuk::Resource which has been created by the feederagent with the Pimo:Document of the same item, and therefore implicitly share the annotations? Also I am not storing any real content in those Resources, I use the Content Resource and the Content Thing only to annotate the content of the item. For fulltext search or similar things I expect to use the items created by the FeederAgent (meaning I will have to create a feederagent for notes as well). Anyhow, this solution doesn't seem ideal, so I'd be interested how you guys intend to solve the issues. Especially what Resources you create and how you tell them apart from the ones created by the Feederagents. Also are you using Nepomuk purely internal, or do you actually create content which could be reused by other applications? Cheers, Chris PS: Some background info on my app in case youre interested http://gitorious.org/notetaker/pages/Home
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