Hi, This sounds like a great idea! I thought I might bring my 2 cents from android development: - Android has a really simple system where you can say go to <a href="http://www.abc.blogs.org">www.abc.blogs.org</a> in any app that can open it. That opens it in a web browser or in the <a href="http://blogs.org">blogs.org</a> app if installed. This works because the <a href="http://blogs.org">blogs.org</a> app says it can handle these types of links in its manifest. - With android you can also launch a set activity. You can pass these activities bunches of data (a stuffed up version of a dictionary) - You can also "start activity for result" I like the idea of launching with a given object id. Maybe some of these are helpful :) I like uri system. Sam <div class="gmail_quote">On Jan 22, 2014 4:00 AM, "Manuel Quiñones" <<a href="mailto:manuq@laptop.org">manuq@laptop.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> This topic appears once in a while in this mailing list, and as far as I know, each time it happens no one objects. So, time to bring it again. One of Sugar key principles is simplicity. Activities are meant to be simple, and users can make interesting things happen when they interoperate with the activities. They do so by using the Journal and the Clipboard. However, there are cases where you want to start an activity from inside another, thus skipping the step through the Journal. For example, a user wants to download and read a book. The current steps are: - start GetBooks activity - search for the book - download the book (get book) - show book in Journal - start Read activity from the Journal object If activities could start other activities, the steps are simpler: - start GetBooks activity - search for the book - download the book (get book) - start Read activity This limitation (among others) has made Ceibal find a replacement for GetBooks and Read, their own BibliotecaSegura. So I've been investigating a bit, and found that is preety easy to add this feature. In fact it is already possible. I was able to change GetBooks to open Read after a book is downloaded. See: <a href="https://github.com/manuq/get-books/compare/open-activity" target="_blank">https://github.com/manuq/get-books/compare/open-activity</a> This is a bit hackish, - imports a model from the shell - the bundle_id of the activity is hardcoded I think the more elegant option is to extend sugar-launch to something like: sugar-launch --object_id object_id And reuse the code in the Journal that starts or resumes activities (misc.py). Thoughts? -- .. manuq .. _______________________________________________ Sugar-devel mailing list <a href="mailto:Sugar-devel@lists.sugarlabs.org">Sugar-devel@lists.sugarlabs.org</a> <a href="http://lists.sugarlabs.org/listinfo/sugar-devel" target="_blank">http://lists.sugarlabs.org/listinfo/sugar-devel</a> </blockquote></div>