<?xml version="1.0"?> <model> <name>Grey Wall</name> <version>1.0</version> <sdf version="1.3">model-1_3.sdf</sdf> <sdf version="1.4">model-1_4.sdf</sdf> <sdf version="1.5">model.sdf</sdf> <author> <name>Maurice Fallon</name> <email>mauricefallon@gmail.com</email> </author> <description> A grey wall. </description> </model>