Bridge styles and attributes

Filter-style bridge

These are utilities (possibly a jobstep) that act as filters between legacy format data and century format data. They act on a file or database level, not on a record-by-record basis.

Filter-style forward and backward bridges Forward Bridge (from legacy format to century format.

(May include record selection in addition to format conversion)

Backward Bridge (from century format to legacy format)

Wrapper-style bridges

These are subroutines, called on demand: on an as-needed, record-by-record basis. Replace your I/O statements with calls to the bridges.

Tip: Turn the existing I/O statement into a comment and mark it with some unique tag to make it easy to burn the bridge when the time comes.

Wrapper-style forward and backward bridges

 

Forward bridge (from Legacy format to century format)

Backward bridge (from century format to legacy format)

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