diff --git a/renrs/src/lib.rs b/renrs/src/lib.rs
index 916dd69..02e146f 100644
--- a/renrs/src/lib.rs
+++ b/renrs/src/lib.rs
@@ -178,15 +178,15 @@ fn parse_token(pair: Pair) -> Token {
         };
     }
     match token {
-        Rule::string => {
+        Rule::String => {
             let contents = contents!();
             Token::Str(match contents.as_rule() {
-                Rule::single_quote_string_data => contents.as_str().replace("\\'", "'"),
-                Rule::double_quote_string_data => contents.as_str().replace("\\\"", "\""),
+                Rule::SingleQuoteStringData => contents.as_str().replace("\\'", "'"),
+                Rule::DoubleQuoteStringData => contents.as_str().replace("\\\"", "\""),
                 _ => unreachable!(),
             })
         }
-        Rule::array => {
+        Rule::Array => {
             let contents = contents!();
             let mut array = Vec::new();
             for token in contents.into_inner() {
@@ -194,13 +194,13 @@ fn parse_token(pair: Pair) -> Token {
             }
             Token::Array(array)
         }
-        Rule::boolean => Token::Boolean(match pair.as_str() {
+        Rule::Boolean => Token::Boolean(match pair.as_str() {
             "True" => true,
             "False" => false,
             _ => unreachable!(),
         }),
-        Rule::number => Token::Number(pair.as_str().parse().unwrap()),
-        Rule::keyword => Token::Keyword(pair.as_str().to_owned()),
+        Rule::Number => Token::Number(pair.as_str().parse().unwrap()),
+        Rule::Keyword => Token::Keyword(pair.as_str().to_owned()),
         __ => unreachable!(),
     }
 }
diff --git a/renrs/src/rpy.pest b/renrs/src/rpy.pest
index 0834d09..a8b69c6 100644
--- a/renrs/src/rpy.pest
+++ b/renrs/src/rpy.pest
@@ -1,52 +1,54 @@
 // characters are anything but newlines
 char = { !NEWLINE ~ ANY }
 
-// token definition
+// Token definition
 // http://pest.rs/book/grammars/syntax.html#atomic
 inner = @{ char* }
 
-token = { string | array | boolean | number | keyword }
+Token = { String | Array | Boolean | Number | Keyword }
 
 // KEYWORDS
 // has to be atomic for no implicit separate (spaces)
-keyword = ${ (!(whitespace | NEWLINE) ~ ANY)+ }
+Keyword = ${ (!(whitespace | NEWLINE) ~ ANY)+ }
 
 // STRING
-single_quote_string_data = @{ (
+SingleQuoteStringData = @{ (
     "\\'" // Escaped single quotes
     | (!"'" ~ ANY)
 )* }
-double_quote_string_data = @{ (
+DoubleQuoteStringData = @{ (
     "\\\"" // Escaped double quotes
     | (!"\"" ~ ANY)
 )* }
-string = ${
-    ("'" ~ single_quote_string_data ~ "'")
-    | ("\"" ~ double_quote_string_data ~ "\"")
+String = ${
+    ("'" ~ SingleQuoteStringData ~ "'")
+    | ("\"" ~ DoubleQuoteStringData ~ "\"")
 }
 
-// ARRAY
-array = ${
+// Array
+Array = ${
     "[" ~ "]"
-    | "[" ~ whitespace* ~ NEWLINE* ~ whitespace* ~ token ~ ("," ~ whitespace* ~ NEWLINE* ~ whitespace* ~ token)* ~ NEWLINE* ~ "]"
+    | "[" ~ whitespace* ~ NEWLINE* ~ whitespace* ~ Token ~ ("," ~ whitespace* ~ NEWLINE* ~ whitespace* ~ Token)* ~ NEWLINE* ~ "]"
 }
 
 // BOOLEAN
-boolean = ${ "True" | "False" }
+Boolean = ${ "True" | "False" }
 
 // NUMBER
-number = @{
+Number = @{
     "-"?
     ~ ("0" | ASCII_NONZERO_DIGIT ~ ASCII_DIGIT*)
     ~ ("." ~ ASCII_DIGIT*)?
 }
 
 // comments are a # followed by
-// any number of non-newline characters
+// any Number of non-newline characters
 COMMENT = _{ "#" ~ char* }
 
+Colon = { ":" }
+
 // lines are comprised of a statement
-line = @{ (token ~ whitespace+)* ~ token }
+line = @{ (Token ~ whitespace+)* ~ Token ~ Colon? }
 
 file = { SOI ~ NEWLINE* ~ block_content* ~ NEWLINE* ~ EOI }