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