== [[changes]] Changes

=== This version from previous releases of this document
- 2015-02-25: corrected flag values
- 2015-02-25: documents are now identified by date, not revision
- 2015-03-10: Correction of the TIGER vintage that is used for geographic references

=== Version 4.1-draft from 4.0
- added J2J, National QWI spec