According to McKinsey: 

These are the foundational skills you will need for the future of work, comprising 56 distinct elements of talent (DELTAs) that fall within thirteen broad skills groups, and four categories, namely, cognitive, digital, interpersonal, and self-leadership. 

They  call them DELTAs, rather than skills, because they are a mix of skills and attitudes. 

“Adaptability” and “coping with uncertainty” are attitudes, for example.