You would be advised to rely on your Python IDE (eg. PythonWin, Pyscripter etc) to obtain a list of applicable functions and help.>>> dir(arcpy.env)
['MDomain', 'MResolution', 'MTolerance', 'XYDomain', 'XYResolution', 'XYTolerance', 'ZDomain', 'ZResolution', 'ZTolerance', '__class__', '__delattr__', '__delitem__', '__dict__', '__doc__', '__format__', '__getattribute__', '__getitem__', '__hash__', '__init__', '__iter__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', '_environments', '_gp', '_refresh', 'autoCommit', 'cartographicCoordinateSystem', 'cellSize', 'coincidentPoints', 'compression', 'configKeyword', 'derivedPrecision', 'extent', 'geographicTransformations', 'items', 'iteritems', 'keys', 'maintainSpatialIndex', 'mask', 'newPrecision', 'outputCoordinateSystem', 'outputMFlag', 'outputZFlag', 'outputZValue', 'overwriteOutput', 'projectCompare', 'pyramid', 'qualifiedFieldNames', 'randomGenerator', 'rasterStatistics', 'referenceScale', 'scratchWorkspace', 'snapRaster', 'spatialGrid1', 'spatialGrid2', 'spatialGrid3', 'terrainMemoryUsage', 'tileSize', 'tinSaveVersion', 'values', 'workspace']
As indicated, there are places where case-sensitivity or examples are lacking....report them, they are usually on the fixes quickly.Also, use the online help and NOT the help built into the software, the former is updated regularly, the latter is nothttp://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html?TopicName=welcome