When taking notes, being able to place a tag on a certain textfield which mentions the subjects to which it belongs. If at another timepoint information gets added in the document about the same subject, you can add this tag to this text as well. By integrating a text-filter you will be able to easily view only the information about a certain subject without all the other information in the document. Project's have multiple phases, and in some cases, these will progress parallel to each other. This way, you will be able to only view the information which is relevant for a certain phase.