diff --git a/src/core/annotation.js b/src/core/annotation.js
index c9dfa7faf..229f15707 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -16,12 +16,12 @@
 
 import {
   AnnotationBorderStyleType, AnnotationFieldFlag, AnnotationFlag,
-  AnnotationType, getInheritableProperty, OPS, stringToBytes, stringToPDFString,
-  Util, warn
+  AnnotationType, OPS, stringToBytes, stringToPDFString, Util, warn
 } from '../shared/util';
 import { Catalog, FileSpec, ObjectLoader } from './obj';
 import { Dict, isDict, isName, isRef, isStream } from './primitives';
 import { ColorSpace } from './colorspace';
+import { getInheritableProperty } from './core_utils';
 import { OperatorList } from './operator_list';
 import { Stream } from './stream';
 
diff --git a/src/core/chunked_stream.js b/src/core/chunked_stream.js
index c824ce74a..920fc9af0 100644
--- a/src/core/chunked_stream.js
+++ b/src/core/chunked_stream.js
@@ -15,9 +15,9 @@
 /* eslint no-var: error */
 
 import {
-  arrayByteLength, arraysToBytes, createPromiseCapability, isEmptyObj,
-  MissingDataException
+  arrayByteLength, arraysToBytes, createPromiseCapability, isEmptyObj
 } from '../shared/util';
+import { MissingDataException } from './core_utils';
 
 class ChunkedStream {
   constructor(length, chunkSize, manager) {
diff --git a/src/core/cmap.js b/src/core/cmap.js
index 9fa6ffb63..1c0fe238b 100644
--- a/src/core/cmap.js
+++ b/src/core/cmap.js
@@ -14,11 +14,11 @@
  */
 
 import {
-  CMapCompressionType, FormatError, isString, MissingDataException, unreachable,
-  warn
+  CMapCompressionType, FormatError, isString, unreachable, warn
 } from '../shared/util';
 import { isCmd, isEOF, isName, isStream } from './primitives';
 import { Lexer } from './parser';
+import { MissingDataException } from './core_utils';
 import { Stream } from './stream';
 
 var BUILT_IN_CMAPS = [
diff --git a/src/core/core_utils.js b/src/core/core_utils.js
new file mode 100644
index 000000000..a3fa68c5d
--- /dev/null
+++ b/src/core/core_utils.js
@@ -0,0 +1,160 @@
+/* Copyright 2019 Mozilla Foundation
+ *
+ * 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.
+ */
+/* eslint no-var: error */
+
+import { assert, warn } from '../shared/util';
+
+function getLookupTableFactory(initializer) {
+  let lookup;
+  return function() {
+    if (initializer) {
+      lookup = Object.create(null);
+      initializer(lookup);
+      initializer = null;
+    }
+    return lookup;
+  };
+}
+
+const MissingDataException = (function MissingDataExceptionClosure() {
+  function MissingDataException(begin, end) {
+    this.begin = begin;
+    this.end = end;
+    this.message = `Missing data [${begin}, ${end})`;
+  }
+
+  MissingDataException.prototype = new Error();
+  MissingDataException.prototype.name = 'MissingDataException';
+  MissingDataException.constructor = MissingDataException;
+
+  return MissingDataException;
+})();
+
+const XRefEntryException = (function XRefEntryExceptionClosure() {
+  function XRefEntryException(msg) {
+    this.message = msg;
+  }
+
+  XRefEntryException.prototype = new Error();
+  XRefEntryException.prototype.name = 'XRefEntryException';
+  XRefEntryException.constructor = XRefEntryException;
+
+  return XRefEntryException;
+})();
+
+const XRefParseException = (function XRefParseExceptionClosure() {
+  function XRefParseException(msg) {
+    this.message = msg;
+  }
+
+  XRefParseException.prototype = new Error();
+  XRefParseException.prototype.name = 'XRefParseException';
+  XRefParseException.constructor = XRefParseException;
+
+  return XRefParseException;
+})();
+
+/**
+ * Get the value of an inheritable property.
+ *
+ * If the PDF specification explicitly lists a property in a dictionary as
+ * inheritable, then the value of the property may be present in the dictionary
+ * itself or in one or more parents of the dictionary.
+ *
+ * If the key is not found in the tree, `undefined` is returned. Otherwise,
+ * the value for the key is returned or, if `stopWhenFound` is `false`, a list
+ * of values is returned. To avoid infinite loops, the traversal is stopped when
+ * the loop limit is reached.
+ *
+ * @param {Dict} dict - Dictionary from where to start the traversal.
+ * @param {string} key - The key of the property to find the value for.
+ * @param {boolean} getArray - Whether or not the value should be fetched as an
+ *   array. The default value is `false`.
+ * @param {boolean} stopWhenFound - Whether or not to stop the traversal when
+ *   the key is found. If set to `false`, we always walk up the entire parent
+ *   chain, for example to be able to find `\Resources` placed on multiple
+ *   levels of the tree. The default value is `true`.
+ */
+function getInheritableProperty({ dict, key, getArray = false,
+                                  stopWhenFound = true, }) {
+  const LOOP_LIMIT = 100;
+  let loopCount = 0;
+  let values;
+
+  while (dict) {
+    const value = getArray ? dict.getArray(key) : dict.get(key);
+    if (value !== undefined) {
+      if (stopWhenFound) {
+        return value;
+      }
+      if (!values) {
+        values = [];
+      }
+      values.push(value);
+    }
+    if (++loopCount > LOOP_LIMIT) {
+      warn(`getInheritableProperty: maximum loop count exceeded for "${key}"`);
+      break;
+    }
+    dict = dict.get('Parent');
+  }
+  return values;
+}
+
+const ROMAN_NUMBER_MAP = [
+  '', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM',
+  '', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC',
+  '', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'
+];
+
+/**
+ * Converts positive integers to (upper case) Roman numerals.
+ * @param {integer} number - The number that should be converted.
+ * @param {boolean} lowerCase - Indicates if the result should be converted
+ *   to lower case letters. The default value is `false`.
+ * @return {string} The resulting Roman number.
+ */
+function toRomanNumerals(number, lowerCase = false) {
+  assert(Number.isInteger(number) && number > 0,
+         'The number should be a positive integer.');
+  let pos, romanBuf = [];
+  // Thousands
+  while (number >= 1000) {
+    number -= 1000;
+    romanBuf.push('M');
+  }
+  // Hundreds
+  pos = (number / 100) | 0;
+  number %= 100;
+  romanBuf.push(ROMAN_NUMBER_MAP[pos]);
+  // Tens
+  pos = (number / 10) | 0;
+  number %= 10;
+  romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
+  // Ones
+  romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
+
+  const romanStr = romanBuf.join('');
+  return (lowerCase ? romanStr.toLowerCase() : romanStr);
+}
+
+export {
+  getLookupTableFactory,
+  MissingDataException,
+  XRefEntryException,
+  XRefParseException,
+  getInheritableProperty,
+  toRomanNumerals,
+};
diff --git a/src/core/document.js b/src/core/document.js
index b525bace9..228f505e8 100644
--- a/src/core/document.js
+++ b/src/core/document.js
@@ -15,12 +15,15 @@
 /* eslint no-var: error */
 
 import {
-  assert, FormatError, getInheritableProperty, info, isArrayBuffer, isBool,
-  isNum, isSpace, isString, MissingDataException, OPS, shadow, stringToBytes,
-  stringToPDFString, Util, warn, XRefEntryException, XRefParseException
+  assert, FormatError, info, isArrayBuffer, isBool, isNum, isSpace, isString,
+  OPS, shadow, stringToBytes, stringToPDFString, Util, warn
 } from '../shared/util';
 import { Catalog, ObjectLoader, XRef } from './obj';
 import { Dict, isDict, isName, isStream, Ref } from './primitives';
+import {
+  getInheritableProperty, MissingDataException, XRefEntryException,
+  XRefParseException
+} from './core_utils';
 import { NullStream, Stream, StreamsSequenceStream } from './stream';
 import { AnnotationFactory } from './annotation';
 import { calculateMD5 } from './crypto';
diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index cd2841155..556d13454 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -15,9 +15,9 @@
 
 import {
   AbortException, assert, CMapCompressionType, createPromiseCapability,
-  FONT_IDENTITY_MATRIX, FormatError, getLookupTableFactory, IDENTITY_MATRIX,
-  info, isNum, isString, NativeImageDecoding, OPS, stringToPDFString,
-  TextRenderingMode, UNSUPPORTED_FEATURES, Util, warn
+  FONT_IDENTITY_MATRIX, FormatError, IDENTITY_MATRIX, info, isNum, isString,
+  NativeImageDecoding, OPS, stringToPDFString, TextRenderingMode,
+  UNSUPPORTED_FEATURES, Util, warn
 } from '../shared/util';
 import { CMapFactory, IdentityCMap } from './cmap';
 import { DecodeStream, Stream } from './stream';
@@ -42,6 +42,7 @@ import { Lexer, Parser } from './parser';
 import { bidi } from './bidi';
 import { ColorSpace } from './colorspace';
 import { getGlyphsUnicode } from './glyphlist';
+import { getLookupTableFactory } from './core_utils';
 import { getMetrics } from './metrics';
 import { isPDFFunction } from './function';
 import { JpegStream } from './jpeg_stream';
diff --git a/src/core/fonts.js b/src/core/fonts.js
index a52525127..c7ebbdebf 100644
--- a/src/core/fonts.js
+++ b/src/core/fonts.js
@@ -15,8 +15,7 @@
 
 import {
   assert, bytesToString, FONT_IDENTITY_MATRIX, FontType, FormatError, info,
-  isNum, isSpace, MissingDataException, readUint32, shadow, string32,
-  unreachable, warn
+  isNum, isSpace, readUint32, shadow, string32, unreachable, warn
 } from '../shared/util';
 import {
   CFF, CFFCharset, CFFCompiler, CFFHeader, CFFIndex, CFFParser, CFFPrivateDict,
@@ -36,6 +35,7 @@ import {
 } from './unicode';
 import { FontRendererFactory } from './font_renderer';
 import { IdentityCMap } from './cmap';
+import { MissingDataException } from './core_utils';
 import { Stream } from './stream';
 import { Type1Parser } from './type1_parser';
 
diff --git a/src/core/glyphlist.js b/src/core/glyphlist.js
index d1ded4715..0317ddbbd 100644
--- a/src/core/glyphlist.js
+++ b/src/core/glyphlist.js
@@ -14,7 +14,7 @@
  */
 /* no-babel-preset */
 
-var getLookupTableFactory = require('../shared/util').getLookupTableFactory;
+var getLookupTableFactory = require('./core_utils').getLookupTableFactory;
 
 var getGlyphsUnicode = getLookupTableFactory(function (t) {
   t['A'] = 0x0041;
diff --git a/src/core/metrics.js b/src/core/metrics.js
index 88b3d1542..04741c554 100644
--- a/src/core/metrics.js
+++ b/src/core/metrics.js
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-import { getLookupTableFactory } from '../shared/util';
+import { getLookupTableFactory } from './core_utils';
 
 // The Metrics object contains glyph widths (in glyph space units).
 // As per PDF spec, for most fonts (Type 3 being an exception) a glyph
diff --git a/src/core/obj.js b/src/core/obj.js
index 484460f8d..251613358 100644
--- a/src/core/obj.js
+++ b/src/core/obj.js
@@ -15,15 +15,17 @@
 
 import {
   bytesToString, createPromiseCapability, createValidAbsoluteUrl, FormatError,
-  info, InvalidPDFException, isBool, isNum, isString, MissingDataException,
-  PermissionFlag, shadow, stringToPDFString, stringToUTF8String,
-  toRomanNumerals, unreachable, warn, XRefEntryException, XRefParseException
+  info, InvalidPDFException, isBool, isNum, isString, PermissionFlag, shadow,
+  stringToPDFString, stringToUTF8String, unreachable, warn
 } from '../shared/util';
 import {
   Dict, isCmd, isDict, isName, isRef, isRefsEqual, isStream, Ref, RefSet,
   RefSetCache
 } from './primitives';
 import { Lexer, Parser } from './parser';
+import {
+  MissingDataException, toRomanNumerals, XRefEntryException, XRefParseException
+} from './core_utils';
 import { ChunkedStream } from './chunked_stream';
 import { CipherTransformFactory } from './crypto';
 import { ColorSpace } from './colorspace';
diff --git a/src/core/parser.js b/src/core/parser.js
index c0a76bbb6..c01001fca 100644
--- a/src/core/parser.js
+++ b/src/core/parser.js
@@ -19,7 +19,7 @@ import {
 } from './stream';
 import {
   assert, bytesToString, FormatError, info, isNum, isSpace, isString,
-  MissingDataException, StreamType, warn
+  StreamType, warn
 } from '../shared/util';
 import {
   Cmd, Dict, EOF, isCmd, isDict, isEOF, isName, Name, Ref
@@ -28,6 +28,7 @@ import { CCITTFaxStream } from './ccitt_stream';
 import { Jbig2Stream } from './jbig2_stream';
 import { JpegStream } from './jpeg_stream';
 import { JpxStream } from './jpx_stream';
+import { MissingDataException } from './core_utils';
 
 const MAX_LENGTH_TO_CACHE = 1000;
 const MAX_ADLER32_LENGTH = 5552;
diff --git a/src/core/pattern.js b/src/core/pattern.js
index 83e622c43..f7fb2274f 100644
--- a/src/core/pattern.js
+++ b/src/core/pattern.js
@@ -15,11 +15,11 @@
 /* eslint-disable no-multi-spaces */
 
 import {
-  assert, FormatError, info, MissingDataException, unreachable,
-  UNSUPPORTED_FEATURES, Util, warn
+  assert, FormatError, info, unreachable, UNSUPPORTED_FEATURES, Util, warn
 } from '../shared/util';
 import { ColorSpace } from './colorspace';
 import { isStream } from './primitives';
+import { MissingDataException } from './core_utils';
 
 var ShadingType = {
   FUNCTION_BASED: 1,
diff --git a/src/core/pdf_manager.js b/src/core/pdf_manager.js
index abe2b7df1..36a1729df 100644
--- a/src/core/pdf_manager.js
+++ b/src/core/pdf_manager.js
@@ -14,9 +14,10 @@
  */
 
 import {
-  createValidAbsoluteUrl, MissingDataException, shadow, unreachable, warn
+  createValidAbsoluteUrl, shadow, unreachable, warn
 } from '../shared/util';
 import { ChunkedStreamManager } from './chunked_stream';
+import { MissingDataException } from './core_utils';
 import { PDFDocument } from './document';
 import { Stream } from './stream';
 
diff --git a/src/core/standard_fonts.js b/src/core/standard_fonts.js
index 9ead2b1c7..c21834b89 100644
--- a/src/core/standard_fonts.js
+++ b/src/core/standard_fonts.js
@@ -14,7 +14,7 @@
  */
 /* eslint no-var: error */
 
-import { getLookupTableFactory } from '../shared/util';
+import { getLookupTableFactory } from './core_utils';
 
 /**
  * Hold a map of decoded fonts and of the standard fourteen Type1
diff --git a/src/core/unicode.js b/src/core/unicode.js
index c5ec32c08..f0b362a85 100644
--- a/src/core/unicode.js
+++ b/src/core/unicode.js
@@ -14,7 +14,7 @@
  */
 /* no-babel-preset */
 
-var getLookupTableFactory = require('../shared/util').getLookupTableFactory;
+var getLookupTableFactory = require('./core_utils').getLookupTableFactory;
 
 // Some characters, e.g. copyrightserif, are mapped to the private use area
 // and might not be displayed using standard fonts. Mapping/hacking well-known
diff --git a/src/core/worker.js b/src/core/worker.js
index 46daf0a27..8827c1099 100644
--- a/src/core/worker.js
+++ b/src/core/worker.js
@@ -17,12 +17,13 @@ import {
   arrayByteLength, arraysToBytes, assert, createPromiseCapability, info,
   InvalidPDFException, MissingPDFException, PasswordException,
   setVerbosityLevel, UnexpectedResponseException, UnknownErrorException,
-  UNSUPPORTED_FEATURES, warn, XRefParseException
+  UNSUPPORTED_FEATURES, warn
 } from '../shared/util';
 import { LocalPdfManager, NetworkPdfManager } from './pdf_manager';
 import isNodeJS from '../shared/is_node';
 import { MessageHandler } from '../shared/message_handler';
 import { Ref } from './primitives';
+import { XRefParseException } from './core_utils';
 
 var WorkerTask = (function WorkerTaskClosure() {
   function WorkerTask(name) {
diff --git a/src/display/annotation_layer.js b/src/display/annotation_layer.js
index 5b66faba9..b568731d7 100644
--- a/src/display/annotation_layer.js
+++ b/src/display/annotation_layer.js
@@ -15,7 +15,7 @@
 
 import {
   addLinkAttributes, DOMSVGFactory, getFilenameFromUrl, LinkTarget
-} from './dom_utils';
+} from './display_utils';
 import {
   AnnotationBorderStyleType, AnnotationType, stringToPDFString, unreachable,
   Util, warn
diff --git a/src/display/api.js b/src/display/api.js
index 271aaead3..04eda7517 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -25,7 +25,7 @@ import {
 import {
   DOMCanvasFactory, DOMCMapReaderFactory, DummyStatTimer, loadScript,
   PageViewport, RenderingCancelledException, StatTimer
-} from './dom_utils';
+} from './display_utils';
 import { FontFaceObject, FontLoader } from './font_loader';
 import { apiCompatibilityParams } from './api_compatibility';
 import { CanvasGraphics } from './canvas';
diff --git a/src/display/dom_utils.js b/src/display/display_utils.js
similarity index 100%
rename from src/display/dom_utils.js
rename to src/display/display_utils.js
diff --git a/src/display/svg.js b/src/display/svg.js
index e36e2c73b..755c87b9f 100644
--- a/src/display/svg.js
+++ b/src/display/svg.js
@@ -18,7 +18,7 @@ import {
   createObjectURL, FONT_IDENTITY_MATRIX, IDENTITY_MATRIX, ImageKind, isNum, OPS,
   TextRenderingMode, Util, warn
 } from '../shared/util';
-import { DOMSVGFactory } from './dom_utils';
+import { DOMSVGFactory } from './display_utils';
 import isNodeJS from '../shared/is_node';
 
 var SVGGraphics = function() {
diff --git a/src/license_header.js b/src/license_header.js
index 988b465f2..d167af68c 100644
--- a/src/license_header.js
+++ b/src/license_header.js
@@ -1,4 +1,4 @@
-/* Copyright 2018 Mozilla Foundation
+/* Copyright 2019 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/license_header_libre.js b/src/license_header_libre.js
index 12d6738b7..1aaaf048d 100644
--- a/src/license_header_libre.js
+++ b/src/license_header_libre.js
@@ -2,7 +2,7 @@
  * @licstart The following is the entire license notice for the
  * Javascript code in this page
  *
- * Copyright 2018 Mozilla Foundation
+ * Copyright 2019 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/pdf.js b/src/pdf.js
index 7681115c4..3b84f475c 100644
--- a/src/pdf.js
+++ b/src/pdf.js
@@ -25,7 +25,7 @@ var pdfjsSharedUtil = require('./shared/util.js');
 var pdfjsDisplayAPI = require('./display/api.js');
 var pdfjsDisplayTextLayer = require('./display/text_layer.js');
 var pdfjsDisplayAnnotationLayer = require('./display/annotation_layer.js');
-var pdfjsDisplayDOMUtils = require('./display/dom_utils.js');
+var pdfjsDisplayDisplayUtils = require('./display/display_utils.js');
 var pdfjsDisplaySVG = require('./display/svg.js');
 let pdfjsDisplayWorkerOptions = require('./display/worker_options.js');
 let pdfjsDisplayAPICompatibility = require('./display/api_compatibility.js');
@@ -107,11 +107,11 @@ exports.Util = pdfjsSharedUtil.Util;
 exports.ReadableStream = pdfjsSharedUtil.ReadableStream;
 exports.URL = pdfjsSharedUtil.URL;
 exports.RenderingCancelledException =
-  pdfjsDisplayDOMUtils.RenderingCancelledException;
-exports.getFilenameFromUrl = pdfjsDisplayDOMUtils.getFilenameFromUrl;
-exports.LinkTarget = pdfjsDisplayDOMUtils.LinkTarget;
-exports.addLinkAttributes = pdfjsDisplayDOMUtils.addLinkAttributes;
-exports.loadScript = pdfjsDisplayDOMUtils.loadScript;
+  pdfjsDisplayDisplayUtils.RenderingCancelledException;
+exports.getFilenameFromUrl = pdfjsDisplayDisplayUtils.getFilenameFromUrl;
+exports.LinkTarget = pdfjsDisplayDisplayUtils.LinkTarget;
+exports.addLinkAttributes = pdfjsDisplayDisplayUtils.addLinkAttributes;
+exports.loadScript = pdfjsDisplayDisplayUtils.loadScript;
 exports.GlobalWorkerOptions = pdfjsDisplayWorkerOptions.GlobalWorkerOptions;
 exports.apiCompatibilityParams =
   pdfjsDisplayAPICompatibility.apiCompatibilityParams;
diff --git a/src/shared/util.js b/src/shared/util.js
index 29993afd7..4d03b26e8 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -382,18 +382,6 @@ function shadow(obj, prop, value) {
   return value;
 }
 
-function getLookupTableFactory(initializer) {
-  var lookup;
-  return function () {
-    if (initializer) {
-      lookup = Object.create(null);
-      initializer(lookup);
-      initializer = null;
-    }
-    return lookup;
-  };
-}
-
 var PasswordException = (function PasswordExceptionClosure() {
   function PasswordException(msg, code) {
     this.name = 'PasswordException';
@@ -458,44 +446,6 @@ var UnexpectedResponseException =
   return UnexpectedResponseException;
 })();
 
-var MissingDataException = (function MissingDataExceptionClosure() {
-  function MissingDataException(begin, end) {
-    this.begin = begin;
-    this.end = end;
-    this.message = 'Missing data [' + begin + ', ' + end + ')';
-  }
-
-  MissingDataException.prototype = new Error();
-  MissingDataException.prototype.name = 'MissingDataException';
-  MissingDataException.constructor = MissingDataException;
-
-  return MissingDataException;
-})();
-
-const XRefEntryException = (function XRefEntryExceptionClosure() {
-  function XRefEntryException(msg) {
-    this.message = msg;
-  }
-
-  XRefEntryException.prototype = new Error();
-  XRefEntryException.prototype.name = 'XRefEntryException';
-  XRefEntryException.constructor = XRefEntryException;
-
-  return XRefEntryException;
-})();
-
-var XRefParseException = (function XRefParseExceptionClosure() {
-  function XRefParseException(msg) {
-    this.message = msg;
-  }
-
-  XRefParseException.prototype = new Error();
-  XRefParseException.prototype.name = 'XRefParseException';
-  XRefParseException.constructor = XRefParseException;
-
-  return XRefParseException;
-})();
-
 /**
  * Error caused during parsing PDF data.
  */
@@ -659,53 +609,6 @@ function isEvalSupported() {
   }
 }
 
-/**
- * Get the value of an inheritable property.
- *
- * If the PDF specification explicitly lists a property in a dictionary as
- * inheritable, then the value of the property may be present in the dictionary
- * itself or in one or more parents of the dictionary.
- *
- * If the key is not found in the tree, `undefined` is returned. Otherwise,
- * the value for the key is returned or, if `stopWhenFound` is `false`, a list
- * of values is returned. To avoid infinite loops, the traversal is stopped when
- * the loop limit is reached.
- *
- * @param {Dict} dict - Dictionary from where to start the traversal.
- * @param {string} key - The key of the property to find the value for.
- * @param {boolean} getArray - Whether or not the value should be fetched as an
- *   array. The default value is `false`.
- * @param {boolean} stopWhenFound - Whether or not to stop the traversal when
- *   the key is found. If set to `false`, we always walk up the entire parent
- *   chain, for example to be able to find `\Resources` placed on multiple
- *   levels of the tree. The default value is `true`.
- */
-function getInheritableProperty({ dict, key, getArray = false,
-                                  stopWhenFound = true, }) {
-  const LOOP_LIMIT = 100;
-  let loopCount = 0;
-  let values;
-
-  while (dict) {
-    const value = getArray ? dict.getArray(key) : dict.get(key);
-    if (value !== undefined) {
-      if (stopWhenFound) {
-        return value;
-      }
-      if (!values) {
-        values = [];
-      }
-      values.push(value);
-    }
-    if (++loopCount > LOOP_LIMIT) {
-      warn(`getInheritableProperty: maximum loop count exceeded for "${key}"`);
-      break;
-    }
-    dict = dict.get('Parent');
-  }
-  return values;
-}
-
 var Util = (function UtilClosure() {
   function Util() {}
 
@@ -866,43 +769,6 @@ var Util = (function UtilClosure() {
   return Util;
 })();
 
-const ROMAN_NUMBER_MAP = [
-  '', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM',
-  '', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC',
-  '', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'
-];
-
-/**
- * Converts positive integers to (upper case) Roman numerals.
- * @param {integer} number - The number that should be converted.
- * @param {boolean} lowerCase - Indicates if the result should be converted
- *   to lower case letters. The default value is `false`.
- * @return {string} The resulting Roman number.
- */
-function toRomanNumerals(number, lowerCase = false) {
-  assert(Number.isInteger(number) && number > 0,
-         'The number should be a positive integer.');
-  let pos, romanBuf = [];
-  // Thousands
-  while (number >= 1000) {
-    number -= 1000;
-    romanBuf.push('M');
-  }
-  // Hundreds
-  pos = (number / 100) | 0;
-  number %= 100;
-  romanBuf.push(ROMAN_NUMBER_MAP[pos]);
-  // Tens
-  pos = (number / 10) | 0;
-  number %= 10;
-  romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
-  // Ones
-  romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
-
-  const romanStr = romanBuf.join('');
-  return (lowerCase ? romanStr.toLowerCase() : romanStr);
-}
-
 const PDFStringTranslateTable = [
   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
@@ -1046,7 +912,6 @@ export {
   CMapCompressionType,
   AbortException,
   InvalidPDFException,
-  MissingDataException,
   MissingPDFException,
   NativeImageDecoding,
   PasswordException,
@@ -1057,9 +922,6 @@ export {
   UnexpectedResponseException,
   UnknownErrorException,
   Util,
-  toRomanNumerals,
-  XRefEntryException,
-  XRefParseException,
   FormatError,
   arrayByteLength,
   arraysToBytes,
@@ -1068,8 +930,6 @@ export {
   createPromiseCapability,
   createObjectURL,
   deprecated,
-  getInheritableProperty,
-  getLookupTableFactory,
   getVerbosityLevel,
   info,
   isArrayBuffer,
diff --git a/test/unit/api_spec.js b/test/unit/api_spec.js
index 83bb8edf4..56d744d6b 100644
--- a/test/unit/api_spec.js
+++ b/test/unit/api_spec.js
@@ -23,7 +23,7 @@ import {
 } from '../../src/shared/util';
 import {
   DOMCanvasFactory, RenderingCancelledException, StatTimer
-} from '../../src/display/dom_utils';
+} from '../../src/display/display_utils';
 import {
   getDocument, PDFDataRangeTransport, PDFDocumentProxy, PDFPageProxy, PDFWorker
 } from '../../src/display/api';
diff --git a/test/unit/clitests.json b/test/unit/clitests.json
index 9aa5a7b12..66122437d 100644
--- a/test/unit/clitests.json
+++ b/test/unit/clitests.json
@@ -12,10 +12,11 @@
     "cff_parser_spec.js",
     "cmap_spec.js",
     "colorspace_spec.js",
+    "core_utils_spec.js",
     "crypto_spec.js",
     "display_svg_spec.js",
+    "display_utils_spec.js",
     "document_spec.js",
-    "dom_utils_spec.js",
     "encodings_spec.js",
     "evaluator_spec.js",
     "function_spec.js",
diff --git a/test/unit/cmap_spec.js b/test/unit/cmap_spec.js
index 981f695a1..88b0cefd1 100644
--- a/test/unit/cmap_spec.js
+++ b/test/unit/cmap_spec.js
@@ -14,7 +14,7 @@
  */
 
 import { CMap, CMapFactory, IdentityCMap } from '../../src/core/cmap';
-import { DOMCMapReaderFactory } from '../../src/display/dom_utils';
+import { DOMCMapReaderFactory } from '../../src/display/display_utils';
 import isNodeJS from '../../src/shared/is_node';
 import { Name } from '../../src/core/primitives';
 import { NodeCMapReaderFactory } from './test_utils';
diff --git a/test/unit/core_utils_spec.js b/test/unit/core_utils_spec.js
new file mode 100644
index 000000000..fcdcadff8
--- /dev/null
+++ b/test/unit/core_utils_spec.js
@@ -0,0 +1,158 @@
+/* Copyright 2019 Mozilla Foundation
+ *
+ * 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.
+ */
+
+import { Dict, Ref } from '../../src/core/primitives';
+import {
+  getInheritableProperty, toRomanNumerals
+} from '../../src/core/core_utils';
+import { XRefMock } from './test_utils';
+
+describe('core_utils', function() {
+  describe('getInheritableProperty', function() {
+    it('handles non-dictionary arguments', function() {
+      expect(getInheritableProperty({ dict: null, key: 'foo', }))
+        .toEqual(undefined);
+      expect(getInheritableProperty({ dict: undefined, key: 'foo', }))
+        .toEqual(undefined);
+    });
+
+    it('handles dictionaries that do not contain the property', function() {
+      // Empty dictionary.
+      const emptyDict = new Dict();
+      expect(getInheritableProperty({ dict: emptyDict, key: 'foo', }))
+        .toEqual(undefined);
+
+      // Filled dictionary with a different property.
+      const filledDict = new Dict();
+      filledDict.set('bar', 'baz');
+      expect(getInheritableProperty({ dict: filledDict, key: 'foo', }))
+        .toEqual(undefined);
+    });
+
+    it('fetches the property if it is not inherited', function() {
+      const ref = new Ref(10, 0);
+      const xref = new XRefMock([{ ref, data: 'quux', }]);
+      const dict = new Dict(xref);
+
+      // Regular values should be fetched.
+      dict.set('foo', 'bar');
+      expect(getInheritableProperty({ dict, key: 'foo', })).toEqual('bar');
+
+      // Array value should be fetched (with references resolved).
+      dict.set('baz', ['qux', ref]);
+      expect(getInheritableProperty({ dict, key: 'baz', getArray: true, }))
+        .toEqual(['qux', 'quux']);
+    });
+
+    it('fetches the property if it is inherited and present on one level',
+        function() {
+      const ref = new Ref(10, 0);
+      const xref = new XRefMock([{ ref, data: 'quux', }]);
+      const firstDict = new Dict(xref);
+      const secondDict = new Dict(xref);
+      firstDict.set('Parent', secondDict);
+
+      // Regular values should be fetched.
+      secondDict.set('foo', 'bar');
+      expect(getInheritableProperty({ dict: firstDict, key: 'foo', }))
+        .toEqual('bar');
+
+      // Array value should be fetched (with references resolved).
+      secondDict.set('baz', ['qux', ref]);
+      expect(getInheritableProperty({ dict: firstDict, key: 'baz',
+                                      getArray: true, }))
+        .toEqual(['qux', 'quux']);
+    });
+
+    it('fetches the property if it is inherited and present on multiple levels',
+        function() {
+      const ref = new Ref(10, 0);
+      const xref = new XRefMock([{ ref, data: 'quux', }]);
+      const firstDict = new Dict(xref);
+      const secondDict = new Dict(xref);
+      firstDict.set('Parent', secondDict);
+
+      // Regular values should be fetched.
+      firstDict.set('foo', 'bar1');
+      secondDict.set('foo', 'bar2');
+      expect(getInheritableProperty({ dict: firstDict, key: 'foo', }))
+        .toEqual('bar1');
+      expect(getInheritableProperty({ dict: firstDict, key: 'foo',
+                                      getArray: false, stopWhenFound: false, }))
+        .toEqual(['bar1', 'bar2']);
+
+      // Array value should be fetched (with references resolved).
+      firstDict.set('baz', ['qux1', ref]);
+      secondDict.set('baz', ['qux2', ref]);
+      expect(getInheritableProperty({ dict: firstDict, key: 'baz',
+                                      getArray: true, stopWhenFound: false, }))
+        .toEqual([['qux1', 'quux'], ['qux2', 'quux']]);
+    });
+
+    it('stops searching when the loop limit is reached', function() {
+      const dict = new Dict();
+      let currentDict = dict;
+      let parentDict = null;
+      for (let i = 0; i < 150; i++) { // Exceeds the loop limit of 100.
+        parentDict = new Dict();
+        currentDict.set('Parent', parentDict);
+        currentDict = parentDict;
+      }
+      parentDict.set('foo', 'bar'); // Never found because of loop limit.
+      expect(getInheritableProperty({ dict, key: 'foo', })).toEqual(undefined);
+
+      dict.set('foo', 'baz');
+      expect(getInheritableProperty({ dict, key: 'foo', getArray: false,
+                                      stopWhenFound: false, }))
+        .toEqual(['baz']);
+    });
+  });
+
+  describe('toRomanNumerals', function() {
+    it('handles invalid arguments', function() {
+      for (const input of ['foo', -1, 0]) {
+        expect(function() {
+          toRomanNumerals(input);
+        }).toThrow(new Error('The number should be a positive integer.'));
+      }
+    });
+
+    it('converts numbers to uppercase Roman numerals', function() {
+      expect(toRomanNumerals(1)).toEqual('I');
+      expect(toRomanNumerals(6)).toEqual('VI');
+      expect(toRomanNumerals(7)).toEqual('VII');
+      expect(toRomanNumerals(8)).toEqual('VIII');
+      expect(toRomanNumerals(10)).toEqual('X');
+      expect(toRomanNumerals(40)).toEqual('XL');
+      expect(toRomanNumerals(100)).toEqual('C');
+      expect(toRomanNumerals(500)).toEqual('D');
+      expect(toRomanNumerals(1000)).toEqual('M');
+      expect(toRomanNumerals(2019)).toEqual('MMXIX');
+    });
+
+    it('converts numbers to lowercase Roman numerals', function() {
+      expect(toRomanNumerals(1, /* lowercase = */ true)).toEqual('i');
+      expect(toRomanNumerals(6, /* lowercase = */ true)).toEqual('vi');
+      expect(toRomanNumerals(7, /* lowercase = */ true)).toEqual('vii');
+      expect(toRomanNumerals(8, /* lowercase = */ true)).toEqual('viii');
+      expect(toRomanNumerals(10, /* lowercase = */ true)).toEqual('x');
+      expect(toRomanNumerals(40, /* lowercase = */ true)).toEqual('xl');
+      expect(toRomanNumerals(100, /* lowercase = */ true)).toEqual('c');
+      expect(toRomanNumerals(500, /* lowercase = */ true)).toEqual('d');
+      expect(toRomanNumerals(1000, /* lowercase = */ true)).toEqual('m');
+      expect(toRomanNumerals(2019, /* lowercase = */ true)).toEqual('mmxix');
+    });
+  });
+});
diff --git a/test/unit/custom_spec.js b/test/unit/custom_spec.js
index e729dc37b..d44cc5bab 100644
--- a/test/unit/custom_spec.js
+++ b/test/unit/custom_spec.js
@@ -14,7 +14,7 @@
  */
 
 import { buildGetDocumentParams, NodeCanvasFactory } from './test_utils';
-import { DOMCanvasFactory } from '../../src/display/dom_utils';
+import { DOMCanvasFactory } from '../../src/display/display_utils';
 import { getDocument } from '../../src/display/api';
 import isNodeJS from '../../src/shared/is_node';
 
diff --git a/test/unit/dom_utils_spec.js b/test/unit/display_utils_spec.js
similarity index 95%
rename from test/unit/dom_utils_spec.js
rename to test/unit/display_utils_spec.js
index 938aafd83..474cefe8e 100644
--- a/test/unit/dom_utils_spec.js
+++ b/test/unit/display_utils_spec.js
@@ -13,10 +13,12 @@
  * limitations under the License.
  */
 
-import { DOMSVGFactory, getFilenameFromUrl } from '../../src/display/dom_utils';
+import {
+  DOMSVGFactory, getFilenameFromUrl
+} from '../../src/display/display_utils';
 import isNodeJS from '../../src/shared/is_node';
 
-describe('dom_utils', function() {
+describe('display_utils', function() {
   describe('DOMSVGFactory', function() {
     let svgFactory;
 
diff --git a/test/unit/jasmine-boot.js b/test/unit/jasmine-boot.js
index baff368da..d0e5e5800 100644
--- a/test/unit/jasmine-boot.js
+++ b/test/unit/jasmine-boot.js
@@ -53,11 +53,12 @@ function initializePDFJS(callback) {
     'pdfjs-test/unit/cff_parser_spec',
     'pdfjs-test/unit/cmap_spec',
     'pdfjs-test/unit/colorspace_spec',
+    'pdfjs-test/unit/core_utils_spec',
     'pdfjs-test/unit/crypto_spec',
     'pdfjs-test/unit/custom_spec',
     'pdfjs-test/unit/display_svg_spec',
+    'pdfjs-test/unit/display_utils_spec',
     'pdfjs-test/unit/document_spec',
-    'pdfjs-test/unit/dom_utils_spec',
     'pdfjs-test/unit/encodings_spec',
     'pdfjs-test/unit/evaluator_spec',
     'pdfjs-test/unit/function_spec',
diff --git a/test/unit/util_spec.js b/test/unit/util_spec.js
index 5d626837a..a28eb8eb5 100644
--- a/test/unit/util_spec.js
+++ b/test/unit/util_spec.js
@@ -14,13 +14,11 @@
  */
 
 import {
-  bytesToString, createPromiseCapability, createValidAbsoluteUrl,
-  getInheritableProperty, isArrayBuffer, isBool, isEmptyObj, isNum,
-  isSameOrigin, isSpace, isString, log2, ReadableStream, removeNullCharacters,
-  string32, stringToBytes, stringToPDFString, toRomanNumerals, URL
+  bytesToString, createPromiseCapability, createValidAbsoluteUrl, isArrayBuffer,
+  isBool, isEmptyObj, isNum, isSameOrigin, isSpace, isString, log2,
+  ReadableStream, removeNullCharacters, string32, stringToBytes,
+  stringToPDFString, URL
 } from '../../src/shared/util';
-import { Dict, Ref } from '../../src/core/primitives';
-import { XRefMock } from './test_utils';
 
 describe('util', function() {
   describe('bytesToString', function() {
@@ -54,106 +52,6 @@ describe('util', function() {
     });
   });
 
-  describe('getInheritableProperty', function() {
-    it('handles non-dictionary arguments', function() {
-      expect(getInheritableProperty({ dict: null, key: 'foo', }))
-        .toEqual(undefined);
-      expect(getInheritableProperty({ dict: undefined, key: 'foo', }))
-        .toEqual(undefined);
-    });
-
-    it('handles dictionaries that do not contain the property', function() {
-      // Empty dictionary.
-      const emptyDict = new Dict();
-      expect(getInheritableProperty({ dict: emptyDict, key: 'foo', }))
-        .toEqual(undefined);
-
-      // Filled dictionary with a different property.
-      const filledDict = new Dict();
-      filledDict.set('bar', 'baz');
-      expect(getInheritableProperty({ dict: filledDict, key: 'foo', }))
-        .toEqual(undefined);
-    });
-
-    it('fetches the property if it is not inherited', function() {
-      const ref = new Ref(10, 0);
-      const xref = new XRefMock([{ ref, data: 'quux', }]);
-      const dict = new Dict(xref);
-
-      // Regular values should be fetched.
-      dict.set('foo', 'bar');
-      expect(getInheritableProperty({ dict, key: 'foo', })).toEqual('bar');
-
-      // Array value should be fetched (with references resolved).
-      dict.set('baz', ['qux', ref]);
-      expect(getInheritableProperty({ dict, key: 'baz', getArray: true, }))
-        .toEqual(['qux', 'quux']);
-    });
-
-    it('fetches the property if it is inherited and present on one level',
-        function() {
-      const ref = new Ref(10, 0);
-      const xref = new XRefMock([{ ref, data: 'quux', }]);
-      const firstDict = new Dict(xref);
-      const secondDict = new Dict(xref);
-      firstDict.set('Parent', secondDict);
-
-      // Regular values should be fetched.
-      secondDict.set('foo', 'bar');
-      expect(getInheritableProperty({ dict: firstDict, key: 'foo', }))
-        .toEqual('bar');
-
-      // Array value should be fetched (with references resolved).
-      secondDict.set('baz', ['qux', ref]);
-      expect(getInheritableProperty({ dict: firstDict, key: 'baz',
-                                      getArray: true, }))
-        .toEqual(['qux', 'quux']);
-    });
-
-    it('fetches the property if it is inherited and present on multiple levels',
-        function() {
-      const ref = new Ref(10, 0);
-      const xref = new XRefMock([{ ref, data: 'quux', }]);
-      const firstDict = new Dict(xref);
-      const secondDict = new Dict(xref);
-      firstDict.set('Parent', secondDict);
-
-      // Regular values should be fetched.
-      firstDict.set('foo', 'bar1');
-      secondDict.set('foo', 'bar2');
-      expect(getInheritableProperty({ dict: firstDict, key: 'foo', }))
-        .toEqual('bar1');
-      expect(getInheritableProperty({ dict: firstDict, key: 'foo',
-                                      getArray: false, stopWhenFound: false, }))
-        .toEqual(['bar1', 'bar2']);
-
-      // Array value should be fetched (with references resolved).
-      firstDict.set('baz', ['qux1', ref]);
-      secondDict.set('baz', ['qux2', ref]);
-      expect(getInheritableProperty({ dict: firstDict, key: 'baz',
-                                      getArray: true, stopWhenFound: false, }))
-        .toEqual([['qux1', 'quux'], ['qux2', 'quux']]);
-    });
-
-    it('stops searching when the loop limit is reached', function() {
-      const dict = new Dict();
-      let currentDict = dict;
-      let parentDict = null;
-      for (let i = 0; i < 150; i++) { // Exceeds the loop limit of 100.
-        parentDict = new Dict();
-        currentDict.set('Parent', parentDict);
-        currentDict = parentDict;
-      }
-      parentDict.set('foo', 'bar'); // Never found because of loop limit.
-      expect(getInheritableProperty({ dict, key: 'foo', })).toEqual(undefined);
-
-      dict.set('foo', 'baz');
-      expect(getInheritableProperty({ dict, key: 'foo', getArray: false,
-                                      stopWhenFound: false, }))
-        .toEqual(['baz']);
-    });
-  });
-
   describe('isArrayBuffer', function() {
     it('handles array buffer values', function() {
       expect(isArrayBuffer(new ArrayBuffer(0))).toEqual(true);
@@ -321,42 +219,6 @@ describe('util', function() {
     });
   });
 
-  describe('toRomanNumerals', function() {
-    it('handles invalid arguments', function() {
-      for (const input of ['foo', -1, 0]) {
-        expect(function() {
-          toRomanNumerals(input);
-        }).toThrow(new Error('The number should be a positive integer.'));
-      }
-    });
-
-    it('converts numbers to uppercase Roman numerals', function() {
-      expect(toRomanNumerals(1)).toEqual('I');
-      expect(toRomanNumerals(6)).toEqual('VI');
-      expect(toRomanNumerals(7)).toEqual('VII');
-      expect(toRomanNumerals(8)).toEqual('VIII');
-      expect(toRomanNumerals(10)).toEqual('X');
-      expect(toRomanNumerals(40)).toEqual('XL');
-      expect(toRomanNumerals(100)).toEqual('C');
-      expect(toRomanNumerals(500)).toEqual('D');
-      expect(toRomanNumerals(1000)).toEqual('M');
-      expect(toRomanNumerals(2019)).toEqual('MMXIX');
-    });
-
-    it('converts numbers to lowercase Roman numerals', function() {
-      expect(toRomanNumerals(1, /* lowercase = */ true)).toEqual('i');
-      expect(toRomanNumerals(6, /* lowercase = */ true)).toEqual('vi');
-      expect(toRomanNumerals(7, /* lowercase = */ true)).toEqual('vii');
-      expect(toRomanNumerals(8, /* lowercase = */ true)).toEqual('viii');
-      expect(toRomanNumerals(10, /* lowercase = */ true)).toEqual('x');
-      expect(toRomanNumerals(40, /* lowercase = */ true)).toEqual('xl');
-      expect(toRomanNumerals(100, /* lowercase = */ true)).toEqual('c');
-      expect(toRomanNumerals(500, /* lowercase = */ true)).toEqual('d');
-      expect(toRomanNumerals(1000, /* lowercase = */ true)).toEqual('m');
-      expect(toRomanNumerals(2019, /* lowercase = */ true)).toEqual('mmxix');
-    });
-  });
-
   describe('URL', function() {
     it('should return an Object', function() {
       const url = new URL('https://example.com');