Conventions of Documentaries

To commence my research on the documentary genre, I have looked into and made a list of the typical conventions:

1) VOICEOVER - Aids in informing the audience and can also help to make a documentary feel more personal, as the person could be sharing their point of view on a subject
2)'REAL' FOOTAGE OF EVENTS - All events presented to the audience are to be seen as 'real'. Documentarians often go to great lengths to convince us that the footage is real and unaltered in any way, although editing and voiceover can affect what we as viewers see
3) TECHNICALITY OF REALISM - Uses 'natural' sound and lighting, so nothing appears artificial. Has to be 'real' at all times.
4) ARCHIVE FOOTAGE/STILLS - To aid authenticity and to add further information which the film maker may be unable to obtain themselves. 
5) INTERVIEWS WITH EXPERTS - Used to authenticate the views expressed in the documentary. However, they may sometimes disagree with the tendencies of the documentary, but if this is the case, it is likely that their points will be fought against.
6) USE OF TEXT AND TITLES - Words on screen can help to further inform the audience and provide extra information, and they also often show the passing of time by stating the date or general time. It is a very quick and easy way of providing information
7) SOUND - Music is a very effective way of creating a mood or an atmosphere - this is often non-diegetic . It can also be used as a bridge between scenes, or even in some cases help to further inform the audience
8) VISUAL CODING - Much like in a fictional piece, mise en scene can also be used in documentary. It could possibly be used to make things more clear to the audience and portray information as simply as possible. For example, if you see a man in a white coat and with a stethoscope, most people will automatically recognise that he is a doctor.