Trends for several clusters illustrated for a small selection of elements. Top: Trends for seven open clusters and associations. The last row shows the combined measurements. Bottom: Trends for eight open and globular clusters. Quantities in the first column are shifted by the value of [Fe/H] given under the cluster’s name, so they fit into the same plotting range. The coloured points are unflagged stars; grey crosses are flagged stars. The solid line is a fit for unflagged stars; the dashed line is a fit for all stars. Trends fitted to the complete dataset of clusters are different from those in this illustration and are explained in Section 3.4 and Appendix B.