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Thank you. these are very helpful

Not necessarily. It totally depends on your application. If your dataset is on online social networks and you want to model the relation strength among individuals, you could also consider the degree of intimacy, trustworthiness, and influence among individuals. check out these papers:

For degree of trustworthiness: Article A group trust metric for identifying people of trust in onli...

For degree of influence: https://homes.cs.washington.edu/~jheer/files/snakdd.pdf

For the concept of weight on multiplex networks:

Article Weighted Multiplex Networks

Also take a look at Granovetter paper since it is possibly the first paper who defined the concept of weak and strong ties in social networks and modeled them as a set of nodes and links: https://sociology.stanford.edu/sites/g/files/sbiybj9501/f/publications/the_strength_of_weak_ties_and_exch_w-gans.pdf

Thanks for your comprehensive answer, it was really helpful.

Thank you for responding to my question. I know these similarities but I want to find other properties that I could use to predict link.