Add definition of character

Closes GH-21.
syntax-tree · Nov 18, 2018 · 49032b9 · 49032b9
1 parent 59b8f73
commit 49032b9
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diff --git a/readme.md b/readme.md
@@ -173,6 +173,9 @@ The `line` field (1-indexed integer) represents a line in a source file.
 The `column` field (1-indexed integer) represents a column in a source file.
 The `offset` field (0-indexed integer) represents a character in a source file.
 
+The term character means a (UTF-16) code unit which is defined in the
+[Web IDL][webidl] specification.
+
 #### `Data`
 
 ```idl