hook?

module/applications/sheets/rollTables/rollTable.mjs

@@ -10,15 +10,23 @@ export default class DhRollTableSheet extends foundry.applications.sheets.RollTa
     }
     
     static PARTS = DhRollTableSheet.buildParts();
+
+    static DEFAULT_OPTIONS = {
+        classes: ['daggerheart', 'sheet', 'dh-style']
+    };
     
     static actions = {
         addAltFormula: DhRollTableSheet.#onAddAltFormula,
-        removeAltForuma: DhRollTableSheet.#onRemoveAltFormula
+        removeAltFormula: DhRollTableSheet.#onRemoveAltFormula
     };
 
     //Add formulafield
-    static async #onAddAltFormula(event, target) {}
+    static async #onAddAltFormula(event, target) {
+        
+    }
 
     //Remove formulafield
-    static async #onRemoveAltFormula(event, target) {}
+    static async #onRemoveAltFormula(event, target) {
+
+    }
 }

module/data/rollTable.mjs

@@ -0,0 +1,28 @@
+//Extra definitions for RollTable
+export default class DhRollTableData extends foundry.abstract.TypeDataModel {
+    static defineSchema(){
+        const fields = foundry.data.fields;
+
+        return{
+            formulaName: new fields.StringField({ // This is to give a name to go together with the core.formula
+              required:true,
+              nullable: false,
+              initial: 'Formula' // Should be a translation
+            }),
+            altFormula: new fields.ArrayField(
+                new fields.SchemaField({
+                    key: new fields.StringField({
+                        required:false,
+                        nullable:false,
+                        blank:true
+                    }),
+                    formula: new fields.StringField({
+                        required:true,
+                        blank:false,
+                        initial:"1d4" //Filler value
+                    })
+                })
+            )
+        }
+    }
+}