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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 index10.tmp#id82 index11.tmp#id76 index12.tmp#id97 index13.tmp#id99 index14.tmp#id103 index15.tmp#id108 index16.tmp#id75 index17.tmp#id74 index10.tmp#id82 index11.tmp#id76 index12.tmp#id97 index13.tmp#id99 index14.tmp#id103 index15.tmp#id108 index61.tmp#id566 index62.tmp#id567 index63.tmp#id565 index376.tmp#id568 index377.tmp#id569 index378.tmp#id570 index379.tmp#id564 index918.tmp#id578 index919.tmp#id587 index380.tmp#id574 index920.tmp#id577
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