BJCP 1E
Balance and smoothness are the hallmarks of this style. It has the malt profile of a Helles, the hop character of a Pils, and is slightly stronger than both.
Brewed to a slightly higher starting gravity than other light lagers, providing a firm malty body and underlying maltiness to complement the sulfate-accentuated hop bitterness. The term "Export" is a beer strength category under German beer tax law, and is not strictly synonymous with the "Dortmunder" style. Beer from other cities or regions can be brewed to Export strength, and labeled as such.
DAB Export, Dortmunder Union Export, Dortmunder Kronen, Ayinger Jahrhundert, Great Lakes Dortmunder Gold, Barrel House Duveneck's Dortmunder, Bell's Lager, Dominion Lager, Gordon Biersch Golden Export, Flensburger Gold
You can view the complete style details on the BJCP website. The 2008 style guide is obsolete but there is a similar 2015 style that you can view below...
OG: 1.048-1.056
FG: 1.010-1.015
IBU: 23-30
SRM: 4.0-6.0
ABV: 4.8-6.0%