gml:geometricPositionGroup 

GML supports two different ways to specify a geometric position: either by a direct position (a data type) or a point (a geometric object).
pos elements are positions that are "owned" by the geometric primitive encapsulating this geometric position.
pointProperty elements contain a point that may be referenced from other geometry elements or reference another point defined elsewhere (reuse of existing points).

Element Group Information

Model

gml:pos | gml:pointProperty
Children: gml:pointProperty, gml:pos

Used By

Complex Types gml:GeodesicStringType, gml:GeodesicType
Element Group gml:geometricPositionListGroup
Element gml:TinType/gml:controlPoint

Source 

<group name="geometricPositionGroup">
  <annotation>
    <documentation>GML supports two different ways to specify a geometric position: either by a direct position (a data type) or a point (a geometric object). pos elements are positions that are "owned" by the geometric primitive encapsulating this geometric position. pointProperty elements contain a point that may be referenced from other geometry elements or reference another point defined elsewhere (reuse of existing points).</documentation>
  </annotation>
  <choice>
    <element ref="gml:pos"/>
    <element ref="gml:pointProperty"/>
  </choice>
</group>