office365 - Which data sources are 'workingWith' and 'trendingAround' based on? -

which data sources api calls 'working with' , 'trending around' drawing on determine how co-workers or files connected?

is sharepoint or onenote? can assume exchange excluded? yammer?

the place can find description of these calls https://graph.microsoft.io/docs/api-reference/beta/api/user_list_workingwith.

is there anywhere can find more detailed description?

working people people relationship, , trending around people document relationship. both calculated based on public , private information. public information includes people followings in sharepoint, organizational structure, distribution list peers, group memberships, , forth. , private or cached information includes recipient cache exchange, co-authors of sharepoint documents (including onenote), elevated peers (people have looked @ , clicked on info or boards in delve). of these relationships feed ranking , relevance models calculate people working , documents trending around you. not include yammer @ point in time.