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When choosing to install QGIS Desktop using the OSGeo4w advanced install option, I noticed that there are what looks like ambiguous software versions to choose.

For example, currently QGIS Desktop is: 1.8.0-4 or if you click on the version, it changes to 1.8.0-3

and under the libraries to choose: OGR FileGDB Driver (Is this the ESRI API) 1.9.2-1 or if you click on the version, it changes to 1.9.0-1

What does the number after the hyphen refer to? It seems like it could install any number of versions, but likely it has a specific meaning. Thanks!

(I'm going to install QGIS Desktop with FGDB support, and I think GDAL 1.9.0 is the one that's been proven to work with QGIS)

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The version number usually has the format x.y.z, while the number after the dash is the package number.

The full package list can always be found here: http://download.osgeo.org/osgeo4w/versions.html

For stability reasons, you have sometimes the choice between several packages available. You can read more on this here: http://trac.osgeo.org/osgeo4w/wiki/PackagingInstructions

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