<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified" version="0.6.50">
	<xsd:annotation>
		<xsd:documentation>
		**********************************************************************  Overview  **************************************************************
			Definition: 			Controlled vocabulary schema for DLESE metadata frameworks
			Framework use: 	ADN-I (item)
			Source org:			Government of Ontario Information and Technology Standards; http://www.gov.on.ca/MBS/techstan/
			Source values:		http://www.gov.on.ca/MBS/techstan/72-00apa.htm
			Source last update:	1996
			DPC last update:		2002-10-31
			Notes: 	
			NAVD29 is National Geodetic Vertical Datum of 1929			
		</xsd:documentation>
	</xsd:annotation>
	<xsd:annotation>
		<xsd:documentation>2003-2-6: Definition: Verical datum is a base reference for a coordinate system. It includes the position of an initial point of orgin and the orientation of an ellipsoid that models the surface of the earh in the region of interest.
2003-2-6: There are horizontal, veritcal and global datums.
2003-2-6: The schema has both global and vertical datums with global datums listed first.
2003-2-6: Added DLESE: and kept Other to the vocab because there are so many local vertical datums that could be used.
2003-2-6: Removed vocab term Unknown because vertical measurements can't have an unknown datum while they can have an Other
2003-2-6: Added Sea level because it is the most popular vertical reference point.
		</xsd:documentation>
	</xsd:annotation>
	<xsd:annotation>
		<xsd:documentation>***********************  Simple Types (alpha order) *************************************</xsd:documentation>
	</xsd:annotation>
	<xsd:simpleType name="DLESEgeodeticDatumGlobalOrVertType">
		<xsd:annotation>
			<xsd:documentation>
				***************************************  geodeticGlobalOrVertType  *****************************************
				Lists the values that will appear in the metadata record
			</xsd:documentation>
		</xsd:annotation>
		<xsd:restriction base="xsd:string">
			<xsd:enumeration value="DLESE:WGS72"/>
			<!--WGS72 is a global geodetic system-->
			<xsd:enumeration value="DLESE:WGS84"/>
			<!--WGS84 is a global geodetic system-->
			<xsd:enumeration value="DLESE:PZ-90"/>
			<!--PZ-90 is global:Russian analog to WGS84-->
			<xsd:enumeration value="DLESE:CGD28-CDN"/>
			<!--CGD28-CDN is a vertical datum used in Canada-->
			<xsd:enumeration value="DLESE:NAVD29-USA"/>
			<!--NAVD29 is a vetical datum used in North American, est. 1929-->
			<xsd:enumeration value="DLESE:NAVD88"/>
			<!--NAVD88 is a vertical datum used in North American, est. 1988-->
			<xsd:enumeration value="DLESE:IGLD55"/>
			<!--IGLD55 is a vertical datum-->
			<xsd:enumeration value="DLESE:IGLD88"/>
			<!--IGLD88 is a vertical datum-->
			<xsd:enumeration value="DLESE:Sea level"/>
			<!-- Sea level is vertical datum-->
			<xsd:enumeration value="DLESE:Other"/>
			<!-- the attribute datumGV will indicate whether it is veritcal or horizontal-->
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="DLESEgeodeticDatumGlobalOrVertLeafType">
		<xsd:annotation>
			<xsd:documentation>
				***************************************  DLESEgeodeticDatumGlobalOrVertLeafType  ***********************
				Lists leaf values
			</xsd:documentation>
		</xsd:annotation>
		<xsd:restriction base="xsd:string">
			<xsd:enumeration value="WGS72"/>
			<!--WGS72 is a global geodetic system-->
			<xsd:enumeration value="WGS84"/>
			<!--WGS84 is a global geodetic system-->
			<xsd:enumeration value="PZ-90"/>
			<!--PZ-90 is global:Russian analog to WGS84-->
			<xsd:enumeration value="CGD28-CDN"/>
			<!--CGD28-CDN is a vertical datum used in Canada-->
			<xsd:enumeration value="NAVD29-USA"/>
			<!--NAVD29 is a vetical datum used in North American, est. 1929-->
			<xsd:enumeration value="NAVD88"/>
			<!--NAVD88 is a vertical datum used in North American, est. 1988-->
			<xsd:enumeration value="IGLD55"/>
			<!--IGLD55 is a vertical datum-->
			<xsd:enumeration value="IGLD88"/>
			<!--IGLD88 is a vertical datum-->
			<xsd:enumeration value="Sea level"/>
			<!-- Sea level is vertical datum-->
			<xsd:enumeration value="Other"/>
			<!-- the attribute datumGV will indicate whether it is veritcal or horizontal-->
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:annotation>
		<xsd:documentation>*** LICENSE INFORMATION *****
		Copyright 2002, 2003 DLESE Program Center
		University Corporation for Atmospheric Research (UCAR)
		P.O. Box 3000, Boulder, CO 80307, United States of America
		email: support@dlese.org. 
These schemas are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.  These schemas are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this project; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA  
		</xsd:documentation>
	</xsd:annotation>
</xsd:schema>

