diff --git a/plugins/entity-validation/api-report.md b/plugins/entity-validation/api-report.md
index 1a3b92a7c1..2fccbf9471 100644
--- a/plugins/entity-validation/api-report.md
+++ b/plugins/entity-validation/api-report.md
@@ -9,12 +9,9 @@ import { BackstagePlugin } from '@backstage/core-plugin-api';
 import { RouteRef } from '@backstage/core-plugin-api';
 
 // @public (undocumented)
-export const EntityValidationPage: ({
-  defaultPreviewCatalog,
-  locationPlaceholder,
-}: {
-  defaultPreviewCatalog?: string | undefined;
-  locationPlaceholder?: string | undefined;
+export const EntityValidationPage: (props: {
+  defaultYaml?: string | undefined;
+  defaultLocation?: string | undefined;
 }) => JSX.Element;
 
 // @public (undocumented)
diff --git a/plugins/entity-validation/package.json b/plugins/entity-validation/package.json
index a6ea724473..3ff4f0ad5c 100644
--- a/plugins/entity-validation/package.json
+++ b/plugins/entity-validation/package.json
@@ -31,8 +31,8 @@
     "@backstage/catalog-model": "workspace:^",
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
+    "@backstage/errors": "workspace:^",
     "@backstage/plugin-catalog-common": "workspace:^",
-    "@backstage/plugin-catalog-node": "workspace:^",
     "@backstage/plugin-catalog-react": "workspace:^",
     "@backstage/theme": "workspace:^",
     "@codemirror/language": "^6.0.0",
diff --git a/plugins/entity-validation/src/components/EntityValidationOutput/EntityValidationOutput.tsx b/plugins/entity-validation/src/components/EntityValidationOutput/EntityValidationOutput.tsx
index f58fc90559..bc7e22ef54 100644
--- a/plugins/entity-validation/src/components/EntityValidationOutput/EntityValidationOutput.tsx
+++ b/plugins/entity-validation/src/components/EntityValidationOutput/EntityValidationOutput.tsx
@@ -15,7 +15,6 @@
  */
 import React from 'react';
 import { identityApiRef, useApi } from '@backstage/core-plugin-api';
-import { CatalogProcessorResult } from '@backstage/plugin-catalog-node';
 import {
   catalogApiRef,
   humanizeEntityRef,
@@ -25,6 +24,7 @@ import useAsync from 'react-use/lib/useAsync';
 import { InfoCard, Progress } from '@backstage/core-components';
 import Alert from '@material-ui/lab/Alert';
 import {
+  CatalogProcessorResult,
   ValidationOutput,
   ValidationOutputError,
   ValidationOutputOk,
diff --git a/plugins/entity-validation/src/components/EntityValidationPage/EntityValidationPage.tsx b/plugins/entity-validation/src/components/EntityValidationPage/EntityValidationPage.tsx
index d39b234342..dc86af8763 100644
--- a/plugins/entity-validation/src/components/EntityValidationPage/EntityValidationPage.tsx
+++ b/plugins/entity-validation/src/components/EntityValidationPage/EntityValidationPage.tsx
@@ -17,7 +17,7 @@ import React, { useState } from 'react';
 import { Button, Content, Header, Page } from '@backstage/core-components';
 import { EntityTextArea } from '../EntityTextArea';
 import { Grid, TextField } from '@material-ui/core';
-import { CatalogProcessorResult } from '@backstage/plugin-catalog-node';
+import { CatalogProcessorResult } from '../../types';
 import { parseEntityYaml } from '../../utils';
 import { EntityValidationOutput } from '../EntityValidationOutput';
 
@@ -36,14 +36,16 @@ spec:
   owner: owner
 `;
 
-export const EntityValidationPage = ({
-  defaultPreviewCatalog = EXAMPLE_CATALOG_INFO_YAML,
-  locationPlaceholder = 'https://github.com/backstage/backstage/blob/master/catalog-info.yaml',
-}: {
-  defaultPreviewCatalog?: string;
-  locationPlaceholder?: string;
+export const EntityValidationPage = (props: {
+  defaultYaml?: string;
+  defaultLocation?: string;
 }) => {
-  const [catalogYaml, setCatalogYaml] = useState(defaultPreviewCatalog);
+  const {
+    defaultYaml = EXAMPLE_CATALOG_INFO_YAML,
+    defaultLocation = 'https://github.com/backstage/backstage/blob/master/catalog-info.yaml',
+  } = props;
+
+  const [catalogYaml, setCatalogYaml] = useState(defaultYaml);
   const [yamlFiles, setYamlFiles] = useState<CatalogProcessorResult[]>();
   const [locationUrl, setLocationUrl] = useState('');
 
@@ -72,7 +74,8 @@ export const EntityValidationPage = ({
               margin="normal"
               variant="outlined"
               required
-              placeholder={locationPlaceholder}
+              value={defaultLocation}
+              placeholder={defaultLocation}
               helperText="Location where you catalog-info.yaml file is, or will be, located"
               onChange={e => setLocationUrl(e.target.value)}
             />
diff --git a/plugins/entity-validation/src/processingResult.ts b/plugins/entity-validation/src/processingResult.ts
new file mode 100644
index 0000000000..de9d8adbbd
--- /dev/null
+++ b/plugins/entity-validation/src/processingResult.ts
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2020 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// File copied from https://github.com/backstage/backstage/blob/master/plugins/catalog-node/src/api/processingResult.ts
+import { InputError, NotFoundError } from '@backstage/errors';
+import { Entity } from '@backstage/catalog-model';
+import { LocationSpec } from '@backstage/plugin-catalog-common';
+import { CatalogProcessorResult, EntityRelationSpec } from './types';
+
+/**
+ * Factory functions for the standard processing result types.
+ *
+ * @public
+ */
+export const processingResult = Object.freeze({
+  notFoundError(
+    atLocation: LocationSpec,
+    message: string,
+  ): CatalogProcessorResult {
+    return {
+      type: 'error',
+      location: atLocation,
+      error: new NotFoundError(message),
+    };
+  },
+
+  inputError(
+    atLocation: LocationSpec,
+    message: string,
+  ): CatalogProcessorResult {
+    return {
+      type: 'error',
+      location: atLocation,
+      error: new InputError(message),
+    };
+  },
+
+  generalError(
+    atLocation: LocationSpec,
+    message: string,
+  ): CatalogProcessorResult {
+    return { type: 'error', location: atLocation, error: new Error(message) };
+  },
+
+  location(newLocation: LocationSpec): CatalogProcessorResult {
+    return { type: 'location', location: newLocation };
+  },
+
+  entity(atLocation: LocationSpec, newEntity: Entity): CatalogProcessorResult {
+    return { type: 'entity', location: atLocation, entity: newEntity };
+  },
+
+  relation(spec: EntityRelationSpec): CatalogProcessorResult {
+    return { type: 'relation', relation: spec };
+  },
+
+  refresh(key: string): CatalogProcessorResult {
+    return { type: 'refresh', key };
+  },
+} as const);
diff --git a/plugins/entity-validation/src/types.ts b/plugins/entity-validation/src/types.ts
index 69caf79e33..7ecc27bb25 100644
--- a/plugins/entity-validation/src/types.ts
+++ b/plugins/entity-validation/src/types.ts
@@ -13,8 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { Entity } from '@backstage/catalog-model';
+import { CompoundEntityRef, Entity } from '@backstage/catalog-model';
 import { ValidateEntityResponse } from '@backstage/catalog-client';
+import { LocationSpec } from '@backstage/plugin-catalog-common';
 
 export type ValidationOutputError = {
   type: 'error';
@@ -28,3 +29,54 @@ export type ValidationOutputOk = {
 };
 
 export type ValidationOutput = ValidationOutputOk | ValidationOutputError;
+
+export type EntityRelationSpec = {
+  /**
+   * The source entity of this relation.
+   */
+  source: CompoundEntityRef;
+
+  /**
+   * The type of the relation.
+   */
+  type: string;
+
+  /**
+   * The target entity of this relation.
+   */
+  target: CompoundEntityRef;
+};
+
+type CatalogProcessorLocationResult = {
+  type: 'location';
+  location: LocationSpec;
+};
+
+type CatalogProcessorEntityResult = {
+  type: 'entity';
+  entity: Entity;
+  location: LocationSpec;
+};
+
+type CatalogProcessorRelationResult = {
+  type: 'relation';
+  relation: EntityRelationSpec;
+};
+
+type CatalogProcessorErrorResult = {
+  type: 'error';
+  error: Error;
+  location: LocationSpec;
+};
+
+type CatalogProcessorRefreshKeysResult = {
+  type: 'refresh';
+  key: string;
+};
+
+export type CatalogProcessorResult =
+  | CatalogProcessorLocationResult
+  | CatalogProcessorEntityResult
+  | CatalogProcessorRelationResult
+  | CatalogProcessorErrorResult
+  | CatalogProcessorRefreshKeysResult;
diff --git a/plugins/entity-validation/src/utils/utils.ts b/plugins/entity-validation/src/utils.ts
similarity index 95%
rename from plugins/entity-validation/src/utils/utils.ts
rename to plugins/entity-validation/src/utils.ts
index dde50d2f9c..d81de6f6c9 100644
--- a/plugins/entity-validation/src/utils/utils.ts
+++ b/plugins/entity-validation/src/utils.ts
@@ -17,10 +17,8 @@ import { Entity, stringifyLocationRef } from '@backstage/catalog-model';
 import lodash from 'lodash';
 import yaml from 'yaml';
 import { LocationSpec } from '@backstage/plugin-catalog-common';
-import {
-  CatalogProcessorResult,
-  processingResult,
-} from '@backstage/plugin-catalog-node';
+import { CatalogProcessorResult } from './types';
+import { processingResult } from './processingResult';
 
 // Copy from: https://github.com/backstage/backstage/blob/master/plugins/catalog-backend/src/modules/util/parse.ts
 export function* parseEntityYaml(
diff --git a/plugins/entity-validation/src/utils/index.ts b/plugins/entity-validation/src/utils/index.ts
deleted file mode 100644
index 8d45a67a36..0000000000
--- a/plugins/entity-validation/src/utils/index.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright 2023 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-export * from './utils';
diff --git a/yarn.lock b/yarn.lock
index a3e9612ca6..7e53aaf8bb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5770,8 +5770,8 @@ __metadata:
     "@backstage/core-components": "workspace:^"
     "@backstage/core-plugin-api": "workspace:^"
     "@backstage/dev-utils": "workspace:^"
+    "@backstage/errors": "workspace:^"
     "@backstage/plugin-catalog-common": "workspace:^"
-    "@backstage/plugin-catalog-node": "workspace:^"
     "@backstage/plugin-catalog-react": "workspace:^"
     "@backstage/test-utils": "workspace:^"
     "@backstage/theme": "workspace:^"