OpenGIS complexType BSplineType

Type Heirarchy
{http://www.opengis.net/gml}AbstractCurveSegmentType (by extension) {http://www.opengis.net/gml}BSplineType

Derived Types
{http://www.opengis.net/gml}BSplineType {http://www.opengis.net/gml}BezierType (by restriction) {http://www.opengis.net/gml}Bezier (by type) {http://www.opengis.net/gml}BSpline (by type)

Abstract	false (This can be used in an instance)
Target Namespace	http://www.opengis.net/gml
Declared Namespaces	xmlns:gml=http://www.opengis.net/gml xmlns:sch=http://www.ascc.net/xml/schematron xmlns:xlink=http://www.w3.org/1999/xlink xmlns=http://www.w3.org/2001/XMLSchema

<complexType name="BSplineType">
    <annotation>
        <documentation>A B-Spline is a piecewise parametric polynomial or rational curve described in terms of control points and basis functions. Knots are breakpoints on the curve that connect its pieces. They are given as a non-decreasing sequence of real numbers. If the weights in the knots are equal then it is a polynomial spline. The degree is the algebraic degree of the basis functions.</documentation>
    </annotation>
    <complexContent>
        <extension base="gml:AbstractCurveSegmentType">
            <sequence>
                <choice>
                    <annotation>
                        <documentation>
GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only.
                        </documentation>
                    </annotation>
                    <choice minOccurs="0" maxOccurs="unbounded">
                        <element ref="gml:pos"/>
                        <element ref="gml:pointProperty"/>
                        <element ref="gml:pointRep">
                            <annotation>
                                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
                            </annotation>
                        </element>
                    </choice>
                    <element ref="gml:posList"/>
                    <element ref="gml:coordinates">
                        <annotation>
                            <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
                        </annotation>
                    </element>
                </choice>
                <element name="degree" type="nonNegativeInteger">
                    <annotation>
                        <documentation>The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.</documentation>
                    </annotation>
                </element>
                <element name="knot" type="gml:KnotPropertyType" minOccurs="2" maxOccurs="unbounded">
                    <annotation>
                        <documentation>The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.</documentation>
                    </annotation>
                </element>
            </sequence>
            <attribute name="interpolation" type="gml:CurveInterpolationType"
                default="polynomialSpline">
                <annotation>
                    <documentation>
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".
                    </documentation>
                </annotation>
            </attribute>
            <attribute name="isPolynomial" type="boolean" use="optional">
                <annotation>
                    <documentation>The attribute isPolynomial is set to true if this is a polynomial spline.</documentation>
                </annotation>
            </attribute>
            <attribute name="knotType" type="gml:KnotTypesType" use="optional">
                <annotation>
                    <documentation>
The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only
and is set according to the different construction-functions.
                    </documentation>
                </annotation>
            </attribute>
        </extension>
    </complexContent>
</complexType>

complexType {http://www.opengis.net/gml}BSplineType

Source

Documentation