diff --git a/src/process/filter/__tests__/filter.test.ts b/src/process/filter/__tests__/filter.test.ts
index 78748da9..0a899e8e 100644
--- a/src/process/filter/__tests__/filter.test.ts
+++ b/src/process/filter/__tests__/filter.test.ts
@@ -25,7 +25,7 @@ it("Should not filter empty array value for dataGrid component", async () => {
   const context: any = generateProcessorContext(dataGridComp, data);
   filterProcessSync(context);
   expect(context.scope.filter).to.deep.equal({
-    dataGrid: { compModelType: "array", include: true, value: [] },
+    dataGrid: { compModelType: "nestedArray", include: true, value: [] },
   });
 });
 
@@ -50,7 +50,7 @@ it("Should not filter empty array value for editGrid component", async () => {
   const context: any = generateProcessorContext(editGridComp, data);
   filterProcessSync(context);
   expect(context.scope.filter).to.deep.equal({
-    editGrid: { compModelType: "array", include: true, value: [] },
+    editGrid: { compModelType: "nestedArray", include: true, value: [] },
   });
 });
 
@@ -75,7 +75,7 @@ it("Should not filter empty array value for dataTable component", async () => {
   const context: any = generateProcessorContext(dataTableComp, data);
   filterProcessSync(context);
   expect(context.scope.filter).to.deep.equal({
-    dataTable: { compModelType: "array", include: true, value: [] },
+    dataTable: { compModelType: "nestedArray", include: true, value: [] },
   });
 });
 
diff --git a/src/process/filter/index.ts b/src/process/filter/index.ts
index 07df7558..d1569f21 100644
--- a/src/process/filter/index.ts
+++ b/src/process/filter/index.ts
@@ -18,7 +18,7 @@ export const filterProcessSync: ProcessorFnSync<FilterScope> = (context: FilterC
           value: { data: {} }
         };
         break;
-      case 'array':
+      case 'nestedArray':
         scope.filter[absolutePath] = {
           compModelType: modelType,
           include: true,
diff --git a/src/process/populate/index.ts b/src/process/populate/index.ts
index ece6c9e3..f336106c 100644
--- a/src/process/populate/index.ts
+++ b/src/process/populate/index.ts
@@ -10,7 +10,7 @@ export const populateProcessSync: ProcessorFnSync<PopulateScope> = (context: Pop
     const compData: any = get(data, compDataPath);
     if (!scope.populated) scope.populated = [];
     switch (getModelType(component)) {
-        case 'array':
+        case 'nestedArray':
             if (!compData || !compData.length) {
                 set(data, compDataPath, [{}]);
                 scope.row = get(data, compDataPath)[0];
@@ -39,4 +39,4 @@ export const populateProcessInfo = {
     name: 'populate',
     shouldProcess: (context: PopulateContext) => true,
     processSync: populateProcessSync,
-};
\ No newline at end of file
+};
diff --git a/src/process/validation/rules/validateMultiple.ts b/src/process/validation/rules/validateMultiple.ts
index 7b300768..bd09ccca 100644
--- a/src/process/validation/rules/validateMultiple.ts
+++ b/src/process/validation/rules/validateMultiple.ts
@@ -86,7 +86,7 @@ export const validateMultipleSync: RuleFnSync = (
 
   const shouldBeMultipleArray = !!component.multiple;
   const isRequired = !!component.validate?.required;
-  const underlyingValueShouldBeArray = getModelType(component) === 'array' || (isTagsComponent(component) && component.storeas === 'array');
+  const underlyingValueShouldBeArray = getModelType(component) === 'nestedArray' || (isTagsComponent(component) && component.storeas === 'array');
   const valueIsArray = Array.isArray(value);
 
   if (shouldBeMultipleArray) {
diff --git a/src/utils/formUtil.ts b/src/utils/formUtil.ts
index a07dbeb1..cf233f23 100644
--- a/src/utils/formUtil.ts
+++ b/src/utils/formUtil.ts
@@ -104,15 +104,30 @@ export function uniqueName(name: string, template?: string, evalContext?: any) {
   return uniqueName;
 }
 
-// TODO: bring in all component types (don't forget premium components)
-export const MODEL_TYPES_OF_KNOWN_COMPONENTS: Record<string, string[]> = {
-  array: [
+/**
+ * Defines model types for known components.
+ * For now, these will be the only model types supported by the @formio/core library.
+ *
+ * nestedArray: for components that store their data as an array and have nested components.
+ * array: for components that store their data as an array.
+ * dataObject: for components that store their data in a nested { data: {} } object.
+ * object: for components that store their data in an object.
+ * map: for components that store their data in a map.
+ * content: for components that do not store data.
+ * string: for components that store their data as a string.
+ * number: for components that store their data as a number.
+ * boolean: for components that store their data as a boolean.
+ * none: for components that do not store data and should not be included in the submission.
+ * any: for components that can store any type of data.
+ *
+ */
+export const MODEL_TYPES_OF_KNOWN_COMPONENTS = {
+  nestedArray: [
     'datagrid',
     'editgrid',
     'datatable',
     'dynamicWizard',
     'tagpad',
-    'file',
   ],
   dataObject: [
     'form'
@@ -166,7 +181,8 @@ export const MODEL_TYPES_OF_KNOWN_COMPONENTS: Record<string, string[]> = {
     'button',
     'datasource',
     'sketchpad',
-    'reviewpage'
+    'reviewpage',
+    'file',
   ],
 };
 
@@ -177,9 +193,9 @@ export function getModelType(component: Component): keyof typeof MODEL_TYPES_OF_
   }
 
   // Otherwise, check for known component types.
-  for (const type in MODEL_TYPES_OF_KNOWN_COMPONENTS) {
+  for (const type of Object.keys(MODEL_TYPES_OF_KNOWN_COMPONENTS) as (keyof typeof MODEL_TYPES_OF_KNOWN_COMPONENTS)[]) {
     if (MODEL_TYPES_OF_KNOWN_COMPONENTS[type].includes(component.type)) {
-      return type as keyof typeof MODEL_TYPES_OF_KNOWN_COMPONENTS;
+      return type;
     }
   }
 
@@ -216,11 +232,11 @@ export function getComponentPath(component: Component, path: string) {
   if (path.match(new RegExp(`${key}$`))) {
     return path;
   }
-  return (getModelType(component) === 'layout') ? `${path}.${key}` : path;
+  return (getModelType(component) === 'none') ? `${path}.${key}` : path;
 }
 
 export function isComponentNestedDataType(component: any) {
-  return component.tree || getModelType(component) === 'array' ||
+  return component.tree || getModelType(component) === 'nestedArray' ||
     getModelType(component) === 'dataObject' ||
     getModelType(component) === 'object' ||
     getModelType(component) === 'map';
@@ -244,7 +260,7 @@ export const componentDataPath = (component: any, parentPath: string, path: stri
     if (getModelType(component) === 'dataObject') {
       return `${path}.data`;
     }
-    if (getModelType(component) === 'array') {
+    if (getModelType(component) === 'nestedArray') {
       return `${path}[0]`;
     }
     if (isComponentNestedDataType(component)) {
@@ -415,7 +431,7 @@ export function componentInfo(component: any) {
   const hasRows = component.rows && Array.isArray(component.rows);
   const hasComps = component.components && Array.isArray(component.components);
   const isContent = getModelType(component) === 'content';
-  const isLayout = getModelType(component) === 'layout';
+  const isLayout = getModelType(component) === 'none';
   const isInput = !component.hasOwnProperty('input') || !!component.input;
   return {
     hasColumns,