There are three actions in Eve:
search is used when you want to gather records from one or more databases. These records are called “supporting records”, because they are used as a basis for bound or committed records.
commit actions are used when you want to update records in one or more databases, but they differ in the way the updates are performed.
bound records last only as long as their supporting records. When supporting records changes, then bound records changes accordingly, replacing any previously bound records.
committed records persist past the lifetime of their supporting records. When supporting records change, then a new record is committed, leaving any previously committed records still intact.