Namespace:	http://www.ivoa.net/xml/STC/stc-v1.30.xsd
Type:	polygonType
Content:	complex, 15 attributes, 3 elements
Subst.Gr:	may substitute for elements: Region2, PositionInterval, PositionInterval, Region2
Nillable:	(can be declared as nil using xsi:nil attribute in instance XML documents)
Defined:	globally in stc.xsd; see XML source
Used:	never

XML Representation Summary
<Polygon2
	IDREF_type	=	xs:string
	ID_type	=	xs:string
	coord_system_id	=	xs:IDREF
	epoch	=	xs:decimal
	fill_factor	=	xs:float : "1.0"
	frame_id	=	xs:IDREF
	hi_include	=	xs:boolean : "true"
	id	=	xs:ID
	idref	=	xs:IDREF
	lo_include	=	xs:boolean : "true"
	note	=	xs:string
	ucd	=	xs:string
	unit	=	("deg" | "deg deg m" | "deg deg Mpc" | "rad" | "h" | "arcmin" | "arcsec" | "m" | "km" | "mm" | "AU" | "pc" | "kpc" | "Mpc" | "lyr" | "")
	xlink:href	=	xs:anyURI
	xlink:type	=	("simple" | "extended" | "locator" | "arc" | "resource" | "title") : "simple"
	>
	Content:  Area?, Vertex+
</Polygon2>

A polygon is a shape delineated by a list of vertices connected with lines, great circles, or small circles; the inside of the polygon is circumscribed counter-clockwise by the list of vertices; the polygon may be concave but not self-intersecting; the last vertex in the list is the predecessor of the first. For celestial coordinates it is assumed that we are looking at the sphere from the inside, with Right Ascension increasing to the left. Sides should span less than 180 deg in each coordinate.

<xs:element name="Polygon2" nillable="true" substitutionGroup="Region2" type="polygonType"> <xs:annotation> <xs:documentation> A polygon is a shape delineated by a list of vertices connected with lines, great circles, or small circles; the inside of the polygon is circumscribed counter-clockwise by the list of vertices; the polygon may be concave but not self-intersecting; the last vertex in the list is the predecessor of the first. For celestial coordinates it is assumed that we are looking at the sphere from the inside, with Right Ascension increasing to the left. Sides should span less than 180 deg in each coordinate. </xs:documentation> </xs:annotation> </xs:element>

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