diff --git a/v0.5/p1/spec/EBNF.md b/v0.5/p1/spec/EBNF.md
new file mode 100644
index 000000000..d688833b5
--- /dev/null
+++ b/v0.5/p1/spec/EBNF.md
@@ -0,0 +1,38 @@
+# EBNF 
+
+```chatinput
+<fastn> ::= <comment>* <module_comment>? <item>*
+<item> ::=  <comment> | <section>
+
+
+<module_comment> ::= (<single_module_comment> <new_line>)* <single_module_comment> (<new_line> | <eof>)
+<single_module_comment> ::= <doc_comment_marker> <opt_whitespace> <sentence>? <opt_whitespace> 
+
+<comment> ::= (<single_comment> <new_line>)* <single_comment> (<new_line> | <eof>)
+<single_comment> ::= <comment_marker> <opt_whitespace> <sentence>? <opt_whitespace>
+
+
+<section> ::= <start_marker> <opt_whitespace> <section_declaration>? <new_line>?
+<section_declaration> ::= (<section_kind> <whitespace>)? <section_name> <colon> <opt_whitespace> <section_value>? <opt_whitespace>
+<section_kind> ::= <word>
+<section_name> ::= <word>
+<section_value> ::= <word>
+
+
+
+<start_marker> ::= "--"
+<end_marker> ::= "--" <whitespace> "end:" <opt_whitespace>
+<new_line> ::= "\n"
+<eof> ::= "\n"
+<colon> ::= ":"
+<comment_marker> ::= ";;"
+<doc_comment_marker> ::= ";;;"
+
+<sentence> ::= <word> <opt_whitespace> | <word>
+<opt_whitespace> ::= " "*
+<whitespace> ::= " "+
+<word> ::= <character>+
+<character> ::= <letter> | <digit>
+<letter> ::= "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" | "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z"
+<digit> ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
+```
\ No newline at end of file
diff --git a/v0.5/p1/t/01-comment.ftd b/v0.5/p1/t/01-comment.ftd
new file mode 100644
index 000000000..1e672a9cd
--- /dev/null
+++ b/v0.5/p1/t/01-comment.ftd
@@ -0,0 +1,2 @@
+;; This is comment
+;; This is other line in comment
diff --git a/v0.5/p1/t/01-comment.json b/v0.5/p1/t/01-comment.json
new file mode 100644
index 000000000..30b68ffc1
--- /dev/null
+++ b/v0.5/p1/t/01-comment.json
@@ -0,0 +1,14 @@
+{
+  "doc_name": "01-comment",
+  "items": [
+    {
+      "from": 1,
+      "to": 53,
+      "value": {
+        "type": "comment",
+        "value": " This is comment\nThis is other line in comment"
+      }
+    }
+  ],
+  "line_starts": [1]
+}
\ No newline at end of file