This directory contains a complete set of schemas, which are labelled as 
version 1.0. This is the version of the schema set, not of the individual 
modules. Individual modules may have a different version number.

Included in this set are (versioned modules and blocks are indented)

Modules: "Objects" which are readily incorporated into application schemas.
annualProdRep.xsd
  annProdReportType
binset.xsd
  binsetType
businessAssoc.xsd
  baDefnType
  busAssociateType
documentInfo.xsd
  documentInfoType
extGeodetics.xsd
geodetics.xsd
  AbstractCSType
  EllipsoidType
  PrimeMeridianType
  GeodeticDatumType
  EngineeringDatumType
  ImageDatumType
  VerticalDatumType
  TemporalDatumType
  GeocentricCRSType
  GeographicCRSType
  CompoundCRSType
  EngineeringCRSType
  ImageCRSType
  TemporalCRSType
  VerticalCRSType
  ProjectedCRSType
  GeneralConversionType
  GeneralTransformationType
geophysical.xsd
  StandardData
  EquipmentUsage
  PotentialFieldSet
  SeismicGeometrySet
  SeismicDataSet
  SeismicSet
  GeophysicalML
location.xsd
  goplLocType
  Generic (extends offLocType)
  UKOffshore (extends offLocType)
  LegalText (extends legalLocType)
  USLegal (extends legalLocType)
  locOffsetType
  survLocType
markers.xsd
  markerType
monthProdRep.xsd
  monthlyProdReportType
units.xsd
  unitDictionaryType
  unitDefinitionType
  conversionType
wellHeader.xsd
  WellHeaderType
wellTest.xsd
  wellTestReportType

Subsidiary schemas: Commonly used datatypes and blocks that are pulled out, 
generally for sharing.
components.xsd
baseProdReport.xsd

Enumerated Lists: These are datatypes that are enumerated lists of values. 
They are separated so that they can be versioned separately.
addressKind.xml
addressQualifier.xml
axisOrientation.xml
bhMeasurementType.xml
channelType.xml
countryBasic.xml
currency.xml
depthChoice.xml
deviation.xml
elevCode.xml
endBend.xml
environment.xml
fromDirection.xml
fromLine.xml
gainType.xml
generalStation.xml
geodDatum.xml
indexType.xml
northDirection.xml
phoneType.xml
pickChoice.xml
polarity.xml
projectionType.xml
pushOrPull.xml
receiverType.xml
reservesClass.xml
rightOrLeft.xml
rollAlong.xml
seismicArray.xml
seismicAuxiliary.xml
seismicComponent.xml
seismicCoverage.xml
seismicEnvironment.xml
seismicEquipment.xml
seismicExtrapolation.xml
seismicFieldTransfer.xml
seismicFormat.xml
seismicGeometry.xml
seismicPlatform.xml
seismicProcessing.xml
seismicQuantity.xml
seismicRole.xml
seismicSort.xml
seismicSource.xml
status.xml
sweepType.xml
testReason.xml
validityExtent.xml
wellDirection.xml
wellFacType.xml
wellFluid.xml
wellName.xml
wellPurpose.xml
wellStatus.xml
wellboreClass.xml

Since some modules contain a lot of enumerated lists, supplementary xxxEnum 
files were created to list these:
binsetEnum.xsd
geophysicalEnum.xsd
wellHeaderEnum.xsd

--------------------Enumerated Lists
All enumerated list files (except countryName.xsd) are derived from simple
XML files. The XML files are used to generate the schema files that define
the enumerated lists datatypes. 
The executable is 
  fixup xxx.xml 
which will generate xxx.xsd
The XML files contain the definitions of the enumerated values. They can be
viewed using a browser such as Internet Explorer. There are two stylesheets
developed for viewing - one for countryBasic.xml, the other for the rest.
The enumerated lists output up to four variations. There is the simple type,
which is strictly an enumerated list. This is the basic type (eg., BasicType).
There is an extension type (extBasicType), which allows 'Other: xxxxx'. In 
addition there are two complex types which allow refinements to the values.
They would be refinedBasicType, and refinedExtBasicType. The developer of the
module can decide which of the four is appropriate for their particular use.