diff --git a/.eslintrc.js b/.eslintrc.js
index 6bc3766..fb4a40d 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/.mocharc.js b/.mocharc.js
index 92e13b0..3df0187 100644
--- a/.mocharc.js
+++ b/.mocharc.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/.ratignore b/.ratignore
index 05201d1..b31f5da 100644
--- a/.ratignore
+++ b/.ratignore
@@ -15,5 +15,6 @@
 yarn\.lock
 CODE_OF_CONDUCT\.md
 DISCLAIMER-WIP
+LICENSES
 README\.md
 SECURITY\.md
diff --git a/LICENSES/Apache-2.0.txt b/LICENSES/Apache-2.0.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSES/Apache-2.0.txt
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
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+
+      "Legal Entity" shall mean the union of the acting entity and all
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+      direction or management of such entity, whether by contract or
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
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+      including but not limited to software source code, documentation
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+
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+
+      "Work" shall mean the work of authorship, whether in Source or
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+      of this License, Derivative Works shall not include works that remain
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      communication on electronic mailing lists, source code control systems,
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+
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+          notices within Derivative Works that You distribute, alongside
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+
+      You may add Your own copyright statement to Your modifications and
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      appropriateness of using or redistributing the Work and assume any
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
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+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright [yyyy] [name of copyright owner]
+
+   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.
diff --git a/Makefile b/Makefile
index c193ecf..e00541e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+# SPDX-License-Identifier: Apache-2.0
 # 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
diff --git a/README.md b/README.md
index 121a3cd..039ad5b 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,8 @@
 
 # License
 
-Apache License 2.0
+This project is available as open source under the terms of the Apache 2.0 License. 
+For accurate information, please check individual files.
 
 # Disclaimer
 
diff --git a/babel-register.js b/babel-register.js
index 6ae0a76..6b3028e 100644
--- a/babel-register.js
+++ b/babel-register.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/babel.config.js b/babel.config.js
index 6eeba3a..0550e6d 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/husky.config.js b/husky.config.js
index 6db9eb8..d28abd1 100644
--- a/husky.config.js
+++ b/husky.config.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/nyc.config.js b/nyc.config.js
index f1195d5..04471cd 100644
--- a/nyc.config.js
+++ b/nyc.config.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/apache-annotator/src/dom.ts b/packages/apache-annotator/src/dom.ts
index bed6c17..55bedea 100644
--- a/packages/apache-annotator/src/dom.ts
+++ b/packages/apache-annotator/src/dom.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/apache-annotator/src/selector.ts b/packages/apache-annotator/src/selector.ts
index 70d464e..2bae525 100644
--- a/packages/apache-annotator/src/selector.ts
+++ b/packages/apache-annotator/src/selector.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/@types/optimal-select/index.d.ts b/packages/dom/@types/optimal-select/index.d.ts
index a5364fd..ff7d826 100644
--- a/packages/dom/@types/optimal-select/index.d.ts
+++ b/packages/dom/@types/optimal-select/index.d.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/css.ts b/packages/dom/src/css.ts
index 12da683..9a1bdec 100644
--- a/packages/dom/src/css.ts
+++ b/packages/dom/src/css.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/highlight-text.ts b/packages/dom/src/highlight-text.ts
index 5f8b4f3..aebe2d9 100644
--- a/packages/dom/src/highlight-text.ts
+++ b/packages/dom/src/highlight-text.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/index.ts b/packages/dom/src/index.ts
index f687579..33a4cb8 100644
--- a/packages/dom/src/index.ts
+++ b/packages/dom/src/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/normalize-range.ts b/packages/dom/src/normalize-range.ts
index 0b41899..1094540 100644
--- a/packages/dom/src/normalize-range.ts
+++ b/packages/dom/src/normalize-range.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/owner-document.ts b/packages/dom/src/owner-document.ts
index 102a7de..1991c94 100644
--- a/packages/dom/src/owner-document.ts
+++ b/packages/dom/src/owner-document.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/range/cartesian.ts b/packages/dom/src/range/cartesian.ts
index 00f88dc..df6af23 100644
--- a/packages/dom/src/range/cartesian.ts
+++ b/packages/dom/src/range/cartesian.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/range/index.ts b/packages/dom/src/range/index.ts
index 011e994..e3e3f1e 100644
--- a/packages/dom/src/range/index.ts
+++ b/packages/dom/src/range/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/range/match.ts b/packages/dom/src/range/match.ts
index 8bc535d..83f33d9 100644
--- a/packages/dom/src/range/match.ts
+++ b/packages/dom/src/range/match.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-node-chunker.ts b/packages/dom/src/text-node-chunker.ts
index e02ff71..fa3de07 100644
--- a/packages/dom/src/text-node-chunker.ts
+++ b/packages/dom/src/text-node-chunker.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-position/describe.ts b/packages/dom/src/text-position/describe.ts
index ceaa23a..3ad3bec 100644
--- a/packages/dom/src/text-position/describe.ts
+++ b/packages/dom/src/text-position/describe.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-position/index.ts b/packages/dom/src/text-position/index.ts
index bb73732..099ee87 100644
--- a/packages/dom/src/text-position/index.ts
+++ b/packages/dom/src/text-position/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-position/match.ts b/packages/dom/src/text-position/match.ts
index 1f83528..b171678 100644
--- a/packages/dom/src/text-position/match.ts
+++ b/packages/dom/src/text-position/match.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-quote/describe.ts b/packages/dom/src/text-quote/describe.ts
index 3beff26..987b7fa 100644
--- a/packages/dom/src/text-quote/describe.ts
+++ b/packages/dom/src/text-quote/describe.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-quote/index.ts b/packages/dom/src/text-quote/index.ts
index bb73732..099ee87 100644
--- a/packages/dom/src/text-quote/index.ts
+++ b/packages/dom/src/text-quote/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/text-quote/match.ts b/packages/dom/src/text-quote/match.ts
index 87ef5d2..9692106 100644
--- a/packages/dom/src/text-quote/match.ts
+++ b/packages/dom/src/text-quote/match.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/src/to-range.ts b/packages/dom/src/to-range.ts
index d4cc3d5..a2b92da 100644
--- a/packages/dom/src/to-range.ts
+++ b/packages/dom/src/to-range.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/css/describe.test.ts b/packages/dom/test/css/describe.test.ts
index 711c9ce..ab535bb 100644
--- a/packages/dom/test/css/describe.test.ts
+++ b/packages/dom/test/css/describe.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/css/match-cases.ts b/packages/dom/test/css/match-cases.ts
index 1cf28b9..becb121 100644
--- a/packages/dom/test/css/match-cases.ts
+++ b/packages/dom/test/css/match-cases.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/css/match.test.ts b/packages/dom/test/css/match.test.ts
index ad39b42..3e379ba 100644
--- a/packages/dom/test/css/match.test.ts
+++ b/packages/dom/test/css/match.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/highlight-text/highlight-text.test.ts b/packages/dom/test/highlight-text/highlight-text.test.ts
index 6b42785..df86aa3 100644
--- a/packages/dom/test/highlight-text/highlight-text.test.ts
+++ b/packages/dom/test/highlight-text/highlight-text.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/range/cartesian.test.ts b/packages/dom/test/range/cartesian.test.ts
index 80b8a55..5e7958d 100644
--- a/packages/dom/test/range/cartesian.test.ts
+++ b/packages/dom/test/range/cartesian.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-position/describe.test.ts b/packages/dom/test/text-position/describe.test.ts
index 34a58c8..a8ecaf0 100644
--- a/packages/dom/test/text-position/describe.test.ts
+++ b/packages/dom/test/text-position/describe.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-position/match-cases.ts b/packages/dom/test/text-position/match-cases.ts
index 1e52faa..719df0a 100644
--- a/packages/dom/test/text-position/match-cases.ts
+++ b/packages/dom/test/text-position/match-cases.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-position/match.test.ts b/packages/dom/test/text-position/match.test.ts
index cbfbfc7..f0251d7 100644
--- a/packages/dom/test/text-position/match.test.ts
+++ b/packages/dom/test/text-position/match.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-quote/describe-cases.ts b/packages/dom/test/text-quote/describe-cases.ts
index 2ca29e6..9026836 100644
--- a/packages/dom/test/text-quote/describe-cases.ts
+++ b/packages/dom/test/text-quote/describe-cases.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-quote/describe.test.ts b/packages/dom/test/text-quote/describe.test.ts
index 97f21eb..b5439ee 100644
--- a/packages/dom/test/text-quote/describe.test.ts
+++ b/packages/dom/test/text-quote/describe.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-quote/match-cases.ts b/packages/dom/test/text-quote/match-cases.ts
index 8948b78..7cbfa1a 100644
--- a/packages/dom/test/text-quote/match-cases.ts
+++ b/packages/dom/test/text-quote/match-cases.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/text-quote/match.test.ts b/packages/dom/test/text-quote/match.test.ts
index 69d827e..aef6261 100644
--- a/packages/dom/test/text-quote/match.test.ts
+++ b/packages/dom/test/text-quote/match.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/dom/test/utils.ts b/packages/dom/test/utils.ts
index a391074..ae7dd9c 100644
--- a/packages/dom/test/utils.ts
+++ b/packages/dom/test/utils.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/index.ts b/packages/selector/src/index.ts
index c028836..2976347 100644
--- a/packages/selector/src/index.ts
+++ b/packages/selector/src/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/chunker.ts b/packages/selector/src/text/chunker.ts
index 4d959d2..0238f13 100644
--- a/packages/selector/src/text/chunker.ts
+++ b/packages/selector/src/text/chunker.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/code-point-seeker.ts b/packages/selector/src/text/code-point-seeker.ts
index 5751f1e..96ce7ff 100644
--- a/packages/selector/src/text/code-point-seeker.ts
+++ b/packages/selector/src/text/code-point-seeker.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/describe-text-position.ts b/packages/selector/src/text/describe-text-position.ts
index a5a7cd8..cae5d83 100644
--- a/packages/selector/src/text/describe-text-position.ts
+++ b/packages/selector/src/text/describe-text-position.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/describe-text-quote.ts b/packages/selector/src/text/describe-text-quote.ts
index 54b5e01..bb9e744 100644
--- a/packages/selector/src/text/describe-text-quote.ts
+++ b/packages/selector/src/text/describe-text-quote.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/index.ts b/packages/selector/src/text/index.ts
index 0261823..0287f48 100644
--- a/packages/selector/src/text/index.ts
+++ b/packages/selector/src/text/index.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/match-text-position.ts b/packages/selector/src/text/match-text-position.ts
index 6f2f8be..799b0a7 100644
--- a/packages/selector/src/text/match-text-position.ts
+++ b/packages/selector/src/text/match-text-position.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/match-text-quote.ts b/packages/selector/src/text/match-text-quote.ts
index 78dd96a..e51cf03 100644
--- a/packages/selector/src/text/match-text-quote.ts
+++ b/packages/selector/src/text/match-text-quote.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/text/seeker.ts b/packages/selector/src/text/seeker.ts
index b83de4c..56ddd97 100644
--- a/packages/selector/src/text/seeker.ts
+++ b/packages/selector/src/text/seeker.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/packages/selector/src/types.ts b/packages/selector/src/types.ts
index fd59dfb..5b3a755 100644
--- a/packages/selector/src/types.ts
+++ b/packages/selector/src/types.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/test/data-model.test.ts b/test/data-model.test.ts
index 2d1d9e6..92a566e 100644
--- a/test/data-model.test.ts
+++ b/test/data-model.test.ts
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/web/index.html b/web/index.html
index 8108f5b..8ac55cf 100644
--- a/web/index.html
+++ b/web/index.html
@@ -1,4 +1,6 @@
 <!--
+SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+SPDX-License-Identifier: Apache-2.0
 Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements.  See the NOTICE file
 distributed with this work for additional information
diff --git a/web/index.js b/web/index.js
index d8275bd..009a43d 100644
--- a/web/index.js
+++ b/web/index.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/web/style.css b/web/style.css
index 4ef867d..3341335 100644
--- a/web/style.css
+++ b/web/style.css
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
diff --git a/web/webpack.config.js b/web/webpack.config.js
index b5d2847..5173882 100644
--- a/web/webpack.config.js
+++ b/web/webpack.config.js
@@ -1,4 +1,6 @@
 /**
+ * SPDX-FileCopyrightText: 2016-2020 The Apache Software Foundation
+ * SPDX-License-Identifier: Apache-2.0
  * @license
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file