complexType AbstractGeneralTransformationType

diagram
namespace	http://www.opengis.net/gml
type	restriction of gml:AbstractCoordinateOperationType
properties	base  gml:AbstractCoordinateOperationType abstract  true
children	gml:metaDataProperty gml:coordinateOperationName gml:coordinateOperationID gml:remarks gml:operationVersion gml:validArea gml:scope gml:_positionalAccuracy gml:sourceCRS gml:targetCRS
used by	element  _GeneralTransformation complexType  TransformationType
attributes	Name   Type   Use   Default   Fixed   annotation id required         documentation Database handle for the object.  It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.  An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods.  This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
annotation	documentation An abstract operation on coordinates that usually includes a change of Datum. The parameters of a coordinate transformation are empirically derived from data containing the coordinates of a series of points in both coordinate reference systems. This computational process is usually "over-determined", allowing derivation of error (or accuracy) estimates for the transformation. Also, the stochastic nature of the parameters may result in multiple (different) versions of the same coordinate transformation. This abstract complexType is expected to be extended for well-known operation methods with many Transformation instances, in Application Schemas that define operation-method-specialized value element names and contents. This transformation uses an operation method with associated parameter values. However, operation methods and parameter values are directly associated with concrete subtypes, not with this abstract type. All concrete types derived from this type shall extend this type to include a "usesMethod" element that references one "OperationMethod" element. Similarly, all concrete types derived from this type shall extend this type to include one or more elements each named "uses...Value" that each use the type of an element substitutable for the "_generalParameterValue" element.
source	<xs:complexType name="AbstractGeneralTransformationType" abstract="true">   <xs:annotation>     <xs:documentation>An abstract operation on coordinates that usually includes a change of Datum. The parameters of a coordinate transformation are empirically derived from data containing the coordinates of a series of points in both coordinate reference systems. This computational process is usually "over-determined", allowing derivation of error (or accuracy) estimates for the transformation. Also, the stochastic nature of the parameters may result in multiple (different) versions of the same coordinate transformation. This abstract complexType is expected to be extended for well-known operation methods with many Transformation instances, in Application Schemas that define operation-method-specialized value element names and contents. This transformation uses an operation method with associated parameter values. However, operation methods and parameter values are directly associated with concrete subtypes, not with this abstract type. All concrete types derived from this type shall extend this type to include a "usesMethod" element that references one "OperationMethod" element. Similarly, all concrete types derived from this type shall extend this type to include one or more elements each named "uses...Value" that each use the type of an element substitutable for the "_generalParameterValue" element. </xs:documentation>   </xs:annotation>   <xs:complexContent>     <xs:restriction base="gml:AbstractCoordinateOperationType">       <xs:sequence>         <xs:element ref="gml:metaDataProperty" minOccurs="0" maxOccurs="unbounded"/>         <xs:element ref="gml:coordinateOperationName"/>         <xs:element ref="gml:coordinateOperationID" minOccurs="0" maxOccurs="unbounded"/>         <xs:element ref="gml:remarks" minOccurs="0"/>         <xs:element ref="gml:operationVersion"/>         <xs:element ref="gml:validArea" minOccurs="0"/>         <xs:element ref="gml:scope" minOccurs="0"/>         <xs:element ref="gml:_positionalAccuracy" minOccurs="0" maxOccurs="unbounded"/>         <xs:element ref="gml:sourceCRS"/>         <xs:element ref="gml:targetCRS"/>       </xs:sequence>       <xs:attribute ref="gml:id" use="required"/>     </xs:restriction>   </xs:complexContent> </xs:complexType>

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