Closed Polygon

[Rick Levine]

Can anyone point me to a URL that defines a close polygon as one in which
the last point equals the first?

I'm in the middle of a raging debate (tempest in a teapot) of what a closed
polygon is.  I'm getting polygons in XML from other systems where the XML
schema defines polygons as closed.  Some of the other systems disagree
about what this means.

BTW: I Googled and looked at opengis.org, but it seems no one bothers to
define something so obvious.

Thanks, and sorry for being a little off topic.

Rick

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