I still haven't made the transition to digital, so my understanding of a lot of this is limited.
Even so, at least in concept, removal or addition, emphasizing or de-emphasizing of content in a documentary photo would be tantamount to changing the wording in a written document.
In practice, however, it may not be so clear.
One of the respondents made some interesting points about what can be accurately deduced from the RAW files, pointing out also and the very act of cropping is a form of deletion of material. Then we get into the fact that the photographer could also "crop" the image with a zoom lens or the focal length selected for the shot. Taking it even further, can we trust the chosen framing of the shot to be truly representative of the scene or situation being presented?
I can appreciate that coming up with standards for photographic truth in photojournalism will be a challenge.
- Murray