请问如何用arcpy读取sde库中的图层别名

import arcpy
 # Create a Describe object from the GDB table. 
# 
desc = arcpy.Describe("C:/data/chesapeake.gdb/munich") 
# Print GDB Table properties 
# 
print "%-22s %s" % ("AliasName:", desc.aliasName) 
print "%-22s %s" % ("DefaultSubtypeCode:", desc.defaultSubtypeCode) 
print "%-22s %s" % ("GlobalIDFieldName:", desc.globalIDFieldName) 
print "%-22s %s" % ("ModelName:", desc.modelName) 
print "%-22s %s" % ("RasterFieldName:", desc.rasterFieldName) 
print "%-22s %s" % ("RelationshipClassNames:", desc.relationshipClassNames)
 

请问下ModelName是指什么名称？