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2007: Final NTDB call for data based on old data dictionary
Participants begin working with their registry vendors to make transition
to new data dictionary, either by obtaining an interface that will map
their current registry data to the new format for the 2008 Call for Data,
or by updating their software

2008: First NTDB call for data based on the NTDS version 1.0
Participants must have obtained an interface that provides mapping from
their current registry fields to the new standard OR have updated software
based on the new data dictionary. Continue to work toward obtaining a
software update for the 2009 Call for Data.

2009: Second NTDB call for data based on the new NTDS version 1.0
Participants should have updated software from their vendors that
incorporates all new data fields.