+ title="Poles"
+ tooltip="B-spline poles"
+ enable_value="enable_by_preferences">
+ <validator id="SketchPlugin_BSplineValidator"/>
+ </sketch-bspline_selector>
+ <boolvalue id="need_control_poly"
+ label="Create control polygon"
+ default="true"
+ tooltip="Specify if the control polygon should be created"/>
+ <boolvalue id="Auxiliary"
+ label="Auxiliary"
+ default="false"
+ tooltip="Construction element"
+ obligatory="0"
+ change_visual_attributes="true"/>
+ </feature>
+
+ <!-- SketchMacroBSplinePeriodic -->
+ <feature id="SketchMacroBSplinePeriodic"
+ title="Periodic B-spline"
+ tooltip="Create periodic B-spline curve"
+ icon="icons/Sketch/bspline_p.png"
+ helpfile="bsplineFeature.html">
+ <sketch-bspline_selector id="poles"
+ weights="weights"
+ reference_attribute="poles_ref"
+ title="Poles"
+ tooltip="B-spline poles"