An exchange or connection between two things means they correspond.
When we say that two things correspond, we mean they have some kind of relationship or match. For example, a job description and your skills might correspond, meaning you're qualified for the job. Or, if a map shows where something is on Earth, then the coordinates listed should correspond to those locations. The word can be used with documents too - like when two versions of the same document are supposed to look the same but don't, we say they don't correspond. In other cases, people might have different ideas about how to plan an event and their plans won't correspond.
(constructed with to) To be equivalent or similar in character, quantity, quality, origin, structure, function etc.
