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+If you plan on building a local copy of the FreeBSD documentation, or using
+our toolchain in your own projects, please read the Documentation Primer at:
+
+    https://docs.freebsd.org/en/books/fdp-primer/
+
+for information about the tools and formatting languages we use.
+Chapter 1 has a Quick Start section, and Chapter 2 covers the software
+and related items in more detail.