gml:OrientableCurve 

OrientableCurve consists of a curve and an orientation. If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another AbstractCurve with a parameterization that reverses the sense of the curve traversal.

Element Information

Model

gml:metaDataProperty* , gml:description{0,1} , gml:descriptionReference{0,1} , gml:identifier{0,1} , gml:name* , gml:baseCurve
Children: gml:baseCurve, gml:description, gml:descriptionReference, gml:identifier, gml:metaDataProperty, gml:name

Attributes

QName Type Fixed Default Use Inheritable Annotation
axisLabels gml:NCNameList optional
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.
orientation gml:SignType + optional
srsDimension positiveInteger optional
srsName anyURI optional
uomLabels gml:NCNameList optional

Source 

<element name="OrientableCurve" type="gml:OrientableCurveType" substitutionGroup="gml:AbstractCurve">
  <annotation>
    <documentation>OrientableCurve consists of a curve and an orientation. If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another AbstractCurve with a parameterization that reverses the sense of the curve traversal.</documentation>
  </annotation>
</element>

Sample