nope the nodes won't have multiple categories. it's a notes app after all.

a problem with using plain files (the dir structure idea) arise when you try to search the contents. i'm leaning towards sqlite right now. also with sqlite it's easier to implement fancy stuff like spreadsheet notes etc.

but first i'll switch the gtkctree code to gtktreeview, then start experimenting with sqlite. i also want to experiment with using one unified widget for text and drawings. if it technically can work, then the user will select the i-beam or the pen, and according to the selection he/she can write on the document or draw on it. dunno, it's lots of work.