You have to use both @RelativeStartPosition and @RelativeWorkingPath to define the crease.
The allowed value of the XYPair of @RelativeStartPosition is "0.5 0", which specifies a half fold of the sheet.
The allowed value of the XYPair of @RelativeWorkingPath is "0 1", which specifies a crease over the width of the sheet.
It is allowed to switch the values for X and Y.
Syntax
XPath: //CreasingParams/Crease/@RelativeStartPosition
XPath: //CreasingParams/Crease/@RelativeWorkingPath
Type
XYPair
Supported values @RelativeStartPosition
For "@RelativeStartPosition", the values must be "0.5 0" or "0 0.5".
For "@RelativeWorkingPath", the values must be "0 1" or "1 0".
Remark
The tool can apply a crease only parallel to the leading/trailing edge, over the full width and only at the half fold position.
There is no support for the creasing orientation, therefore 2 orientations are accepted.
There is no support for direct control of the WorkingDirection [Top, Bottom]. Both will be the result of other finishing settings that control facing or feed direction.
<JDF Type ="Combined" Types ="... Creasing ...">
<ResourcePool>
<CreasingParams ID = "res_1" Class = "Parameter" Status = "Available">
<Crease RelativeStartPosition = "0.5 0" RelativeWorkingPath = "0 1">
</Crease>
</CreasingParams>
</ResourcePool>
<ResourceLinkPool>
<CreasingParamsLink rRef = "res_1" Usage = "Input"/>
</ResourceLinkPool>
</JDF>