geometryComplexes.xsd
Copyright (c) 2001-2005 OGC, All Rights Reserved.
For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
A CompositeCurve is defined by a sequence of (orientable) curves such that the
each curve in the sequence terminates at the start point of the subsequent curve in the
list.
This element references or contains one curve in the composite curve.
The curves are contiguous, the collection of curves is ordered.
NOTE: This definition allows for a nested structure, i.e. a CompositeCurve may use,
for example, another CompositeCurve as a curve member.
A CompositeSurface is defined by a set of orientable surfaces. A composite
surface is geometry type with all the geometric properties of a (primitive) surface.
Essentially, a composite surface is a collection of surfaces that join in pairs on common
boundary curves and which, when considered as a whole, form a single surface.
This element references or contains one surface in the composite
surface. The surfaces are contiguous.
NOTE: This definition allows for a nested structure, i.e. a CompositeSurface may
use, for example, another CompositeSurface as a member.
A composite solid is a geometry type with all the geometric properties of a
(primitive) solid.
Essentially, a composite solid is a collection of solids that join in pairs on common
boundary surfaces and which, when considered as a whole, form a single solid.
This element references or contains one solid in the composite solid.
The solids are contiguous.
NOTE: This definition allows for a nested structure, i.e. a CompositeSolid may use,
for example, another CompositeSolid as a member.
A geometric complex.
A property that has a geometric complex as its value domain can either be an
appropriate geometry element encapsulated in an element of this type or an XLink reference
to a remote geometry element (where remote includes geometry elements located elsewhere in
the same document). Either the reference or the contained element must be given, but neither
both nor none.
NOTE: The allowed geometry elements contained in such a property (or referenced by it) have
to be modelled by an XML Schema choice element since the composites inherit both from
geometric complex *and* geometric primitive and are already part of the _GeometricPrimitive
substitution group.
This attribute group includes the XLink attributes (see xlinks.xsd). XLink is
used in GML to reference remote resources (including those elsewhere in the same
document). A simple link element can be constructed by including a specific set of XLink
attributes. The XML Linking Language (XLink) is currently a Proposed Recommendation of the
World Wide Web Consortium. XLink allows elements to be inserted into XML documents so as
to create sophisticated links between resources; such links can be used to reference
remote properties.
A simple link element can be used to implement pointer functionality, and this
functionality has been built into various GML 3 elements by including the
gml:AssociationAttributeGroup.