How to add new attribute?

[Regina Henschel]

Hi all,

I'm going to implement a routing of curved connector shapes, that is 
compatible with OOXML. The information, that the OOXML way has to be 
used, will become a boolean member in class SdrEdgeInfoRec.

For testing I have added a method to class SdrEdgeObj to set the value. 
But I think, using an attribute would be better, same as e.g. 
"EdgeLine1Delta".

When I add the attribute to /core/include/svx/svddef.hxx
can I add it directly after
constexpr TypedWhichId<SdrMetricItem>             SDRATTR_EDGELINE3DELTA 
     (SDRATTR_EDGE_FIRST +10);   // 1106
or do I need to add it at the end, using _first and _last surround as 
can be seen for writingmode2?


Do you have a suggestion for a term for such attribute? I would like to 
start with "Edge", so that it will be listed near the other "Edge.." 
attributes in the UI. "EdgeOOXMLCurve" or "EdgeCompatibleCurveRouting" 
or ...?

Kind regards,
Regina