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1<HTML xmlns:cont="http://www.posc.org/schemas/schemaContent" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><HEAD>
2      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
3   <SCRIPT language="JavaScript" type="text/javascript" src="convert_xsd_to_html.js"></SCRIPT><LINK rel="stylesheet" type="text/css" href="convert_xsd_to_html.css"></HEAD><BODY class="st"><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:schema </SPAN> <SPAN class="t">elementFormDefault</SPAN><SPAN class="m">="</SPAN><B>qualified</B><SPAN class="m">"</SPAN> <SPAN class="t">attributeFormDefault</SPAN><SPAN class="m">="</SPAN><B>unqualified</B><SPAN class="m">"</SPAN> <SPAN class="t">targetNamespace</SPAN><SPAN class="m">="</SPAN><B>http://www.witsml.org/schemas/131</B><SPAN class="m">"</SPAN> <SPAN class="t">version</SPAN><SPAN class="m">="</SPAN><B>1.3.1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
4        </SPAN></DIV><DIV class="k"><SPAN><A STYLE="visibility:hidden" class="b" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;!--</SPAN></SPAN><SPAN class="ci" id="clean"><PRE>                                                     </PRE></SPAN><SPAN class="b">&nbsp;</SPAN><SPAN class="m">--&gt;</SPAN><SCRIPT language="JavaScript">f(document.getElementById('clean'));</SCRIPT></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
5        </SPAN></DIV><DIV class="k"><SPAN><A STYLE="visibility:hidden" class="b" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;!--</SPAN></SPAN><SPAN class="ci" id="clean"><PRE>POSC License Agreement
6        This file is distributed under the POSC License Agreement at
7        http://www.posc.org/about/license.shtml.
8        Use of this file constitutes agreement with the POSC License Agreement.
9        </PRE></SPAN><SPAN class="b">&nbsp;</SPAN><SPAN class="m">--&gt;</SPAN><SCRIPT language="JavaScript">f(document.getElementById('clean'));</SCRIPT></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
10        </SPAN></DIV><DIV class="k"><SPAN><A STYLE="visibility:hidden" class="b" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;!--</SPAN></SPAN><SPAN class="ci" id="clean"><PRE>                                                     </PRE></SPAN><SPAN class="b">&nbsp;</SPAN><SPAN class="m">--&gt;</SPAN><SCRIPT language="JavaScript">f(document.getElementById('clean'));</SCRIPT></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
11        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:include </SPAN> <SPAN class="t">schemaLocation</SPAN><SPAN class="m">="</SPAN><B><A href="typ_dataTypes.html">typ_dataTypes.xsd</A></B><SPAN class="m">"</SPAN><SPAN class="m">/&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
12        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:include </SPAN> <SPAN class="t">schemaLocation</SPAN><SPAN class="m">="</SPAN><B><A href="cs_refWellWellbore.html">cs_refWellWellbore.xsd</A></B><SPAN class="m">"</SPAN><SPAN class="m">/&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
13        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:include </SPAN> <SPAN class="t">schemaLocation</SPAN><SPAN class="m">="</SPAN><B><A href="cs_refWellWellboreRig.html">cs_refWellWellboreRig.xsd</A></B><SPAN class="m">"</SPAN><SPAN class="m">/&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
14        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:include </SPAN> <SPAN class="t">schemaLocation</SPAN><SPAN class="m">="</SPAN><B><A href="attgrp_uid.html">attgrp_uid.xsd</A></B><SPAN class="m">"</SPAN><SPAN class="m">/&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
15        </SPAN></DIV><DIV class="k"><SPAN><A STYLE="visibility:hidden" class="b" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;!--</SPAN></SPAN><SPAN class="ci" id="clean"><PRE>                                                     </PRE></SPAN><SPAN class="b">&nbsp;</SPAN><SPAN class="m">--&gt;</SPAN><SCRIPT language="JavaScript">f(document.getElementById('clean'));</SCRIPT></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
16        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><A NAME="cs_wellDatum"></A><SPAN class="t">xsd:complexType </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>cs_wellDatum</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
17                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
18                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">Defines the datums associated with elevation, vertical depth
19                        and measured depth coordinates within the context of a well. </SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
20                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
21                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:sequence</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
22                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>name</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#nameString">witsml:nameString</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
23                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
24                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The human understandable contextual name of the reference datum.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
25                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
26                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
27                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>code</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_catalog.html#ElevCodeEnum">witsml:ElevCodeEnum</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
28                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
29                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The code value that represents the type of reference datum.
30                                        This may represent a point on a device (e.g., kelly bushing) or it may represent
31                                        a vertical reference datum (e.g., mean sea level).</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
32                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
33                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
34                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>datumName</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#wellKnownNameStruct">witsml:wellKnownNameStruct</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
35                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
36                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The name of the vertical reference datum in a particular naming system.
37                                        This should only be specified if the above 'code' represents some variation of sea level.
38                                        An optional short name (code) can also be specified. Specifying a well known datum is highly desired
39                                        if the above code is a variant of sea level because sea level varies over time and space.
40                                        An example would be to specify a name of 'Caspian Sea' with a code of '5106' in
41                                        the 'EPSG' naming system.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
42                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
43                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
44                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>kind</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#kindString">witsml:kindString</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>unbounded</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
45                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
46                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">Since various activities may use different points as
47                                        measurement datums, it is useful to characterize the point based on its usage.
48                                        A well reference datum may have more than one such characterization.
49                                        For example, it may be the datum used by the driller and logger for measuring
50                                        their depths. Example usage values would be 'permanent','driller', 'logger'
51                                        'WRP' (well reference point) and 'SRP' (site reference point).</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
52                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
53                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
54                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>wellbore</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./cs_refWellWellbore.html#cs_refWellWellbore">witsml:cs_refWellWellbore</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
55                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
56                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">A pointer to the wellbore that contains the reference datum.
57                                        This should be specified if a measured depth is given.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
58                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
59                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
60                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>rig</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./cs_refWellWellboreRig.html#cs_refWellWellboreRig">witsml:cs_refWellWellboreRig</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
61                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
62                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">A pointer to the rig that contains the device used
63                                        as a reference datum. The rig may be associated with a wellbore in another well
64                                        (e.g., pattern drilling using a rig on a track).</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
65                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
66                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
67                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>elevation</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#wellElevationCoord">witsml:wellElevationCoord</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
68                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
69                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The gravity based elevation coordinate of this reference datum
70                                        as measured from another datum. Positive moving upward from the elevation datum.
71                                        An elevation should be given unless this is a vertical reference datum (e.g., sea level). </SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
72                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
73                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
74                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>measuredDepth</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#measuredDepthCoord">witsml:measuredDepthCoord</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
75                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
76                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The measured depth coordinate of this reference datum
77                                        as measured from another datum. The measured depth datum should either be the same as
78                                        the elevation datum or it should be relatable to the elevation datum through other datums.
79                                        Positive moving toward the bottomhole from the measured depth datum.
80                                        This should be given when a local reference is "downhole",
81                                        such as a kickoff point or ocean bottom template, and the borehole may not be vertical.
82                                        If a Depth is given then an Elevation should also be given.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
83                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
84                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
85                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:element </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>comment</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#commentString">witsml:commentString</A></B><SPAN class="m">"</SPAN> <SPAN class="t">minOccurs</SPAN><SPAN class="m">="</SPAN><B>0</B><SPAN class="m">"</SPAN> <SPAN class="t">maxOccurs</SPAN><SPAN class="m">="</SPAN><B>1</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
86                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
87                                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">A contextual description of the well reference datum.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
88                                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
89                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:element</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
90                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:sequence</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
91                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:attribute </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>defaultMeasuredDepth</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#logicalBoolean">witsml:logicalBoolean</A></B><SPAN class="m">"</SPAN> <SPAN class="t">use</SPAN><SPAN class="m">="</SPAN><B>optional</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
92                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
93                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">True indicates that this is the default reference datum
94                                for measured depth coordinates.
95                                False or not given indicates that this is not the default reference datum.
96                                Measured depth coordinates that do not specify a datum reference should be
97                                assumed to be measured relative to this default reference datum.
98                                Only one reference datum may be designated as the default measured depth datum for each well.
99                                Values are "true" (or "1") and "false" ( or "0").</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
100                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
101                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:attribute</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
102                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:attribute </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>defaultVerticalDepth</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#logicalBoolean">witsml:logicalBoolean</A></B><SPAN class="m">"</SPAN> <SPAN class="t">use</SPAN><SPAN class="m">="</SPAN><B>optional</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
103                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
104                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">True indicates that this is the default reference datum
105                                for vertical depth coordinates.
106                                False or not given indicates that this is not the default reference datum.
107                                Vertical depth coordinates that do not specify a datum reference should be
108                                assumed to be measured relative to the default reference datum.
109                                Only one reference datum may be designated as the default vertical depth datum for each well.
110                                Values are "true" (or "1") and "false" ( or "0").</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
111                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
112                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:attribute</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
113                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:attribute </SPAN> <SPAN class="t">name</SPAN><SPAN class="m">="</SPAN><B>defaultElevation</B><SPAN class="m">"</SPAN> <SPAN class="t">type</SPAN><SPAN class="m">="</SPAN><B><A href="./typ_dataTypes.html#logicalBoolean">witsml:logicalBoolean</A></B><SPAN class="m">"</SPAN> <SPAN class="t">use</SPAN><SPAN class="m">="</SPAN><B>optional</B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
114                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
115                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">True indicates that this is the default reference datum
116                                for elevation coordinates. 
117                                False or not given indicates that this is not the default reference datum.
118                                Elevation coordinates that do not specify a datum reference should be assumed to be
119                                measured relative to the default reference datum.
120                                Only one reference datum may be designated as the default elevation datum for each well.
121                                Values are "true" (or "1") and "false" ( or "0").</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
122                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
123                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:attribute</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
124                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:attributeGroup </SPAN> <SPAN class="t">ref</SPAN><SPAN class="m">="</SPAN><B><A href="./attgrp_uid.html#attgrp_uid">witsml:attgrp_uid</A></B><SPAN class="m">"</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
125                        </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em" class="c"><A class="b" href="#" onclick="return false" onfocus="h()">-</A><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV><DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
126                                </SPAN></DIV><DIV class="e"><DIV STYLE="margin-left:1em;text-indent:-2em"><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN><SPAN class="tx">The unique identifier of the reference datum.</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:documentation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
127                        </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:annotation</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
128                </SPAN></DIV><DIV><SPAN class="b">&nbsp;</SPAN><SPAN class="m">&lt;/</SPAN><SPAN class="t">xsd:attributeGroup</SPAN><SPAN class="m">&gt;</SPAN></DIV></DIV></DIV><DIV class="e"><SPAN class="b"></SPAN><SPAN class="tx">
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