One of CCP's goals is to share information. A Geographic Data Committee works to: support data exchange between agencies, collect data, establish data standards, adopt metadata standards, facilitate data sharing, and establish attribute standards.
The CCP's web site identifies several cadastral data attributes as potential "share codes". Share codes provide a convenient means for sharing data between agencies without major changes to database organization. This is accomplished by adding share codes as common fields (also known as link items or relate items) to your database, without otherwise changing your data structure. When cooperating offices incorporate share codes into their databases, it becomes easier to exchange cadastral information --- the share codes acting as data bridges between agencies.