gml:OperationMethod 

gml:OperationMethod is a method (algorithm or procedure) used to perform a coordinate operation. Most operation methods use a number of operation parameters, although some coordinate conversions use none. Each coordinate operation using the method assigns values to these parameters.
The parameter elements are an unordered list of associations to the set of operation parameters and parameter groups used by this operation method.

Element Information

Model

gml:metaDataProperty* , gml:description{0,1} , gml:descriptionReference{0,1} , gml:identifier , gml:name* , gml:remarks{0,1} , (gml:formulaCitation | gml:formula) , gml:sourceDimensions{0,1} , gml:targetDimensions{0,1} , gml:parameter*
Children: gml:description, gml:descriptionReference, gml:formula, gml:formulaCitation, gml:identifier, gml:metaDataProperty, gml:name, gml:parameter, gml:remarks, gml:sourceDimensions, gml:targetDimensions

Attributes

QName Type Fixed Default Use Inheritable Annotation
gml:id ID required 
The attribute gml:id supports provision of a handle for the XML element representing a GML Object. Its use is mandatory for all GML objects. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.

Used By

Complex Type gml:OperationMethodPropertyType

Source 

<element name="OperationMethod" type="gml:OperationMethodType" substitutionGroup="gml:Definition">
  <annotation>
    <documentation>gml:OperationMethod is a method (algorithm or procedure) used to perform a coordinate operation. Most operation methods use a number of operation parameters, although some coordinate conversions use none. Each coordinate operation using the method assigns values to these parameters. The parameter elements are an unordered list of associations to the set of operation parameters and parameter groups used by this operation method.</documentation>
  </annotation>
</element>

Sample