Update and merge PR #107 (REUSE compliance)

Reapply the SPDX header to current files, and some others that seem to
have been overlooked.

Copy LICENSE file instead of moving it (symlinking it breaks Rat, somehow).
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
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+      any Contribution intentionally submitted for inclusion in the Work
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+
+      To apply the Apache License to your work, attach the following
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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