What version of KML is exported using ArcGIS geoprocessing tools?
The header of a KML exported from ArcGIS will indicate that the content is KML 2.2. However, the tags within the KML will only be those that were defined in the KML 2.0/2.1 specifications. Some key items supported in exported KML files include geometry (points, lines, polygons),; ground overlays, feature symbology, LookAt positions, screen overlays (legends), radio button folders (legends), folders (feature layers and group layers), and HTML descriptions. Examples of KML items not supported in exported KML files include COLLADA, regions, and time spans (animations).