Index: trunk/resources/data/validator/deprecated.mapcss
===================================================================
--- trunk/resources/data/validator/deprecated.mapcss	(revision 18834)
+++ trunk/resources/data/validator/deprecated.mapcss	(revision 18843)
@@ -73,4 +73,33 @@
   fixAdd: "wetland=marsh";
 }
+#23185
+*[landuse=reservoir][!reservoir_type],
+*[landuse=reservoir][reservoir_type=water_storage] {
+  group: tr("deprecated tagging");
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "natural=water + water=reservoir";
+  fixAdd: "natural=water";
+  fixAdd: "water=reservoir";
+  fixRemove: "reservoir_type";
+}
+*[landuse=reservoir][reservoir_type=tailings] {
+  group: tr("deprecated tagging");
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "man_made=tailings_pond";
+  fixAdd: "man_made=tailings_pond";
+  fixRemove: "reservoir_type";
+  fixRemove: "reservoir_type";
+}
+*[landuse=reservoir][reservoir_type=evaporator] {
+  group: tr("deprecated tagging");
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "basin=evaporation or landuse=salt_pond";
+}
+*[landuse=reservoir][reservoir_type=sewage] {
+  group: tr("deprecated tagging");
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "natural=water + water=wastewater or landuse=basin + basin=settling or man_made=basin + basin=settling";
+}
+
 *[highway=byway] {
   throwWarning: tr("{0} is deprecated", "{0.tag}");
Index: trunk/resources/data/validator/ignoretags.cfg
===================================================================
--- trunk/resources/data/validator/ignoretags.cfg	(revision 18834)
+++ trunk/resources/data/validator/ignoretags.cfg	(revision 18843)
@@ -50,4 +50,6 @@
 S:taxon:
 S:colour:
+; check_date and check_date:* is used by some surveying applications
+S:check_date
 ;
 ; Ignore valid and semi-valid keys that equal...
@@ -792,4 +794,6 @@
 ; orchard=meadow_orchard seems to be more of a boolean value, "also happens to be a meadow". Don't know how we want to handle it.
 K:orchard=meadow_orchard
+; boundary=religious_administration is not well documented (2023-09-21)
+K:boundary=religious_administration
 ; Streetside parking tags (see #22901 22901.patch for starting icons)
 ; There is an external preset for these tags