Parameters are variable names by which an argument is passed into a method. These parameters are generated for the same BDoc with different values for selection criteria in WHERE CLAUSE (this is a search condition that is used to retrieve specific records from a table).

Parameters for the BDoc are used by business objects to modify WHERE CLAUSE and are also used for retrieving data.

To read an object, which is mapped to a single record in the segment, you need to specify a selection criterion, which selects a unique record from the database. The most common method is to specify the Primary Key of the record.