In few real klics the Annotatie object contains "Polygon" geometry (for the annotatielijn type). Based on "IMKL2015_Objectcatalogus_1.2.1.pdf" (Page 9) the Constraint: GeometrieLijnOfPunt defines that for this particular type we should have GM_Curve and for the Annotatie object possible geometries are: GM_Point and GM_Curve and based on: https://inspire-regadmin.jrc.ec.europa.eu/dataspecification/ScopeObjectDetail.action?objectDetailId=11394 in my opinion this should be: Point and LineString in the GML notation.
Example klicNumber: 19G473111
Example of such object (gmlId): nl.imkl-KL1620.Annotatie-1207
In few real klics the Annotatie object contains "Polygon" geometry (for the annotatielijn type). Based on "IMKL2015_Objectcatalogus_1.2.1.pdf" (Page 9) the Constraint: GeometrieLijnOfPunt defines that for this particular type we should have GM_Curve and for the Annotatie object possible geometries are: GM_Point and GM_Curve and based on: https://inspire-regadmin.jrc.ec.europa.eu/dataspecification/ScopeObjectDetail.action?objectDetailId=11394 in my opinion this should be: Point and LineString in the GML notation.
Example klicNumber: 19G473111
Example of such object (gmlId): nl.imkl-KL1620.Annotatie-1207