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File Versions and TAB, MIF/MID, and WOR Support
The following table lists changes (and their implications) to versions in .tab, workspace, and other files
used by MapInfo Professional.
TAB files are always saved as 300 unless noted in the table
WOR files are always saved as 400 unless noted in the table
Once a table is 'upgraded' to a later version, MapInfo Professional does not 'downgrade' it to an earlier
version if the feature which forced the 'upgrade' is removed.
Workspaces are written fresh each time, and Workspace versions can be decreased if there are no
features in them that require using a higher version.
Pen(0,0,0) and Brush(0,0,0), which were valid in MapInfo Professional 4.1 tables are not valid in
MapInfo Professional 4.5 and later.
Line widths in points is encoded in the Pen clause by multiplying the line width value by 10 and
adding 10 to the result (.2 -> 12, 1.0 -> 20, etc.). This forces a 450 in the MIF file header.
Interleaved line styles are encoded in the Pen clause by increasing the line style value by 128. This
does not force a 450 workspace, it is 4.x compatible, and is saved as 400 TAB.
Version 4.0.0 (400)
:
ActionWORMIF-MIDTAB
Table is a linked ODBC table.X
Tab version stays at 300 with interleaved.XXX
Saved queries are implemented as straight Select
statements. (Saved queries are controlled by the
X
Save Queries in Workspaces check box on the
Options menu, point to Preferences and click
Startup.)
Version 4.1.0 (410)
:
ActionWORMIF-MIDTAB
Table uses MS Access DB's.XX
Version 4.5.0 (450)
:
ActionWORMIF-MIDTAB
Region and polyline objects, that have more than
32K nodes (actually !edit_version 450 and !version
300).
XX
Table uses point sized line widths.XX
Table is a query table.XX
MapInfo Professional 12.5488
File Versions and TAB, MIF/MID, and WOR Support
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