Refer to the Exhibit. The Exhibit shows the group view for an input type tree that defines a purchase order (PO) file. The component rule on the Record component:

Selecting only the last PO record requires a terminal or end-of-group condition, which is the opposite of a rule that fires at the beginning of each new record.

Identifying the end of the PO file is handled by a terminator property or a rule defined at the File type level, not by a component rule scoped to the Record type.

Counting PO records is an occurrence or quantifier function, not the role of a component rule that evaluates positional or content-based conditions to identify structural boundaries.

In a type tree, a component rule on the Record type uses a lookahead or match condition to signal that a new PO record is starting, telling the parser to begin a fresh instance of the Record component when the condition is satisfied. This pattern is standard for handling repeating records where a leading field value or marker distinguishes the start of each new entry in the file.