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
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 two 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>