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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 index0.tmp#id79 index1.tmp#id73 index2.tmp#id94 index3.tmp#id96 index4.tmp#id100 index5.tmp#id105 index6.tmp#id72 index7.tmp#id71 index0.tmp#id79 index1.tmp#id73 index2.tmp#id94 index3.tmp#id96 index4.tmp#id100 index5.tmp#id105 index113.tmp#id666 index114.tmp#id667 index115.tmp#id665 index572.tmp#id668 index573.tmp#id669 index574.tmp#id670 index575.tmp#id664 index1221.tmp#id678 index1222.tmp#id687 index576.tmp#id674 index1358.tmp#id677
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