FAQ: What versions of GML are supported at ArcGIS for Desktop 10.1?
What versions of GML are supported at ArcGIS for Desktop 10.1?
The ArcGIS Data Interoperability Extension reads GML version 2.x and 3.x files and writes out GML version 3.2.1.
ArcGIS for Desktop 10.1 also supports GML Simple Features Profile (GMLSF), and WFS services based on GMLSF. The GML Simple Features Profile is based on GML 3.2.1.
A license for the ArcGIS Data Interoperability Extension is not required to access GMLSF data. For more information, see the link in the Related Information section below.