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Annotations
Attributes
Diagrams
Instances
Properties
Source
Element gml:ConventionalUnit
Namespace http://www.opengis.net/gml/3.2
Annotations
Conventional units that are neither base units nor defined by direct combination of base units are used in many application domains.  For example electronVolt for energy, feet and nautical miles for length.  In most cases there is a known, usually linear, conversion to a preferred unit which is either a base unit or derived by direct combination of base units.
The gml:ConventionalUnit extends gml:UnitDefinition with a property that describes a conversion to a preferred unit for this physical quantity.  When the conversion is exact, the element gml:conversionToPreferredUnit should be used, or when the conversion is not exact the element gml:roughConversionToPreferredUnit is available. Both of these elements have the same content model.  The gml:derivationUnitTerm property defined above is included to allow a user to optionally record how this unit may be derived from other ("more primitive") units.
Diagram
Diagram index4.tmp#id85 index5.tmp#id79 index6.tmp#id100 index7.tmp#id102 index8.tmp#id106 index9.tmp#id111 index10.tmp#id78 index11.tmp#id77 index4.tmp#id85 index5.tmp#id79 index6.tmp#id100 index7.tmp#id102 index8.tmp#id106 index9.tmp#id111 index26.tmp#id592 index27.tmp#id593 index28.tmp#id591 index772.tmp#id594 index773.tmp#id595 index774.tmp#id596 index775.tmp#id590 index776.tmp#id604 index777.tmp#id613 index778.tmp#id600 index779.tmp#id603
Type gml:ConventionalUnitType
Type hierarchy
Properties
content: complex
Model gml:metaDataProperty* , gml:description{0,1} , gml:descriptionReference{0,1} , gml:identifier , gml:name* , gml:remarks{0,1} , gml:quantityType{0,1} , gml:quantityTypeReference{0,1} , gml:catalogSymbol{0,1} , (gml:conversionToPreferredUnit | gml:roughConversionToPreferredUnit) , gml:derivationUnitTerm*
Children gml:catalogSymbol, gml:conversionToPreferredUnit, gml:derivationUnitTerm, gml:description, gml:descriptionReference, gml:identifier, gml:metaDataProperty, gml:name, gml:quantityType, gml:quantityTypeReference, gml:remarks, gml:roughConversionToPreferredUnit
Instance
<gml:ConventionalUnit gml:id="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:descriptionReference xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" owns="false" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:descriptionReference>
  <gml:identifier codeSpace="">{1,1}</gml:identifier>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:ConventionalUnit>
Attributes
QName Type Fixed Default Use 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.
Source
<element name="ConventionalUnit" type="gml:ConventionalUnitType" substitutionGroup="gml:UnitDefinition">
  <annotation>
    <documentation>Conventional units that are neither base units nor defined by direct combination of base units are used in many application domains. For example electronVolt for energy, feet and nautical miles for length. In most cases there is a known, usually linear, conversion to a preferred unit which is either a base unit or derived by direct combination of base units. The gml:ConventionalUnit extends gml:UnitDefinition with a property that describes a conversion to a preferred unit for this physical quantity. When the conversion is exact, the element gml:conversionToPreferredUnit should be used, or when the conversion is not exact the element gml:roughConversionToPreferredUnit is available. Both of these elements have the same content model. The gml:derivationUnitTerm property defined above is included to allow a user to optionally record how this unit may be derived from other ("more primitive") units.</documentation>
  </annotation>
</element>
Schema location http://schemas.opengis.net/gml/3.2.1/units.xsd