This schema defines the contents of the U-Pb fraction input to EARTHTIME U-Pb_Redux software. Copyright 2006-2016 James F. Bowring and EARTHTIME Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. Author: James F. Bowring[smtp:bowring@gmail.com] Created: 1.January.2007 Revised: 1.January.2008 Revised: 8.April.2008 Revised: 5.April.2009 Revised: 27.June.2012 Revised: 23.December.2015