UWS Parameters: What is "isPost"?

[Joshua Fraustro]

I opened a ticket on the UWS github repository here: https://github.com/ivoa-std/UWS/issues/4, but I figured there was a broader reach of some folks who might know the answer.

The UWS specification for "uws:Parameters" lists a boolean XML attribute of "isPost". None of the current versions of the UWS specification (XSD or document) have any description or documentation on the attribute and, as far back as I can search, haven't since its quiet addition in an early draft of UWS 1.0.

Is anyone familiar with the original intention of the attribute? Is anyone actually using it?
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