kc3-lang/kc3

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+# 1.20 Sym
+
+The KC3 type `Sym` is used everywhere in KC3. This is symbolic
+computing : the triple store and data rely on interned strings
+which are easy to compare for equality.
+
+Sorting still relies on Sym's string representation so is slower
+than just comparing pointers.
+
+Symbols either start with a capital letter character, in which
+case this symbol also is a package name (see Packages).
+Otherwise symbols start with `:` and if the symbol string contains
+reserved characters then the symbol is quoted.
+
+## 1.20.1 Examples
+
+```elixir
+ikc3> :"123"
+:123
+ikc3> type(:123)
+Sym
+ikc3> MyModule
+MyModule
+ikc3> type(MyModule)
+Sym
+```