diff --git a/LICENSES/Unlicense.md b/LICENSES/Unlicense.md
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index 0000000..7f6e5ae
--- /dev/null
+++ b/LICENSES/Unlicense.md
@@ -0,0 +1,27 @@
+Unlicense (Public Domain)
+============================
+
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to &lt;<https://unlicense.org/>&gt;
diff --git a/database/datrie/ReadMe.md b/database/datrie/ReadMe.md
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+++ b/database/datrie/ReadMe.md
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+<!--
+SPDX-FileCopyrightText: KOLANICH, 2021
+SPDX-License-Identifier: Unlicense
+-->
+
+datrie
+======
+
+Samples of file format used by [`libdatrie`](https://github.com/tlwg/libdatrie) for serialization.
+
+Source: own work.
diff --git a/database/datrie/generate.py b/database/datrie/generate.py
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index 0000000..58a80a7
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+++ b/database/datrie/generate.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+from pathlib import Path
+
+import datrie
+
+__license__ = "Unlicense"
+__copyright__ = "KOLANICH, 2021"
+
+
+thisDir = Path(__file__).parent()
+
+
+def main():
+	t = datrie.BaseTrie(ranges=(("a", "z"),))
+	t["a"] = 1
+	t["ab"] = 2
+	t["ac"] = 3
+	t["abd"] = 4
+	t["abe"] = 5
+	t["acf"] = 6
+	t["acg"] = 7
+	t.save(str(thisDir / "test.datrie"))
+
+
+if __name__ == "__main__":
+	main()
diff --git a/database/datrie/test.datrie b/database/datrie/test.datrie
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index 0000000..3bdedfc
Binary files /dev/null and b/database/datrie/test.datrie differ
diff --git a/database/datrie/test.datrie.license b/database/datrie/test.datrie.license
new file mode 100644
index 0000000..0b79b72
--- /dev/null
+++ b/database/datrie/test.datrie.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: KOLANICH, 2021
+SPDX-License-Identifier: Unlicense