The find and clear operations are discussed in the same section because they have much in common – in fact, one could argue that a clear is simply a special type of find. Finds and clears follow the same propagation rules and they treat relates-to constraints in a similar manner.
The messages used to Clear DDOs are Clear and Clear_All.
Send Clear of hoDDO
The primary find message is Find. It performs a find based on the contents of the file-buffer, performs a relate on parent DDOs and updates all affected DEOs
Send Find of hoDDO GT 1
Additional messages used for finding are Request_Find, FindByRowId, Find_By_Recnum, and Request_Assign.