Notes. We consider only AGN that are detected above the 5σ limiting magnitude for the four constituent filters in each colour criterion, which are given in Appendix E. For each criterion we report its target class, referring to the population of AGN the criterion aims to select, the total number of selected AGN, the surface density of selected AGN in deg⁻², the completeness (C) at the 5σ level in the relevant filters, and the expected purity (P) for the criterion, as estimated in Euclid Collaboration: Bisigello et al. (2024). The final row for each survey denotes the union (∪) of all considered selection criteria.