How is the possession statistic determined? It is sometimes completely unclear as to who has possession eg. when two teams are battling for the puck in the corner.

Does the NHL or any other league provide guidelines for collecting stats such as possession?

Does the NHL or any other league provide guidelines for use by league statisticians? E.g. for giveaways, takeaways, checks, possession, etc.

I'm not sure how stats are calculated in some cases during an ice hockey game, especially for some of the more recent advanced stats. For example, who has possession when two teams are battling for the puck in the corner? Does the NHL or any other league provide guidelines for collecting these stats? If so, does anyone have a link?

How is the possession statistic determined? It is sometimes completely unclear as to who has possession eg. when two teams are battling for the puck in the corner.

Does the NHL or any other league provide guidelines for collecting stats such as possession?