I don't remember where I got the info the most likely would be something like that for Bristol as I would have searched for something I hoped was definitive.  I was trying to find surfaced routes to get me through the city as I recall a lot of cycleways missing any surface info (and that then makes Ride with GPS which I use for planning reject the route).  My logic for making things foot and cycleway is that's what I see in most parts of OCM and reflects the signing usually with a blue circle showing pedestrians and cycles. When you add cycle and foot path it prompts you to say if segregated or not, so clear if it's shared use or not.  see https://wiki.openstreetmap.org/wiki/Tag:highway=cycleway.   This doesn't suggest the use of "pavement".  https://wiki.openstreetmap.org/wiki/Tag:footway=sidewalk (which is the information for Pavement) doesn't make this any clearer other than to say "Generally any walkway running parallel to the road, which provides an alternative method of travel along the road for pedestrians is considered a sidewalk." which is to me not primarily about cycling.  I guess both can be used and it may not matter greatly?  Happy to be corrected.