diff --git a/README.md b/README.md
index 971b3d1..5750ddb 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
 # Highlight
+[![Go Report Card](https://goreportcard.com/badge/github.com/zyedidia/highlight)](https://goreportcard.com/report/github.com/zyedidia/highlight)
+[![GoDoc](https://godoc.org/github.com/zyedidia/highlight?status.svg)](http://godoc.org/github.com/zyedidia/highlight)
+[![MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/zyedidia/highlight/blob/master/LICENSE)
 
 This is a package for syntax highlighting a large number of different languages. To see the list of
 languages currently supported, see the [`syntax_files`](./syntax_files) directory.
diff --git a/ftdetect.go b/ftdetect.go
index a649d4b..e04130f 100644
--- a/ftdetect.go
+++ b/ftdetect.go
@@ -1,5 +1,8 @@
 package highlight
 
+// DetectFiletype will use the list of syntax definitions provided and the filename and first line of the file
+// to determine the filetype of the file
+// It will return the corresponding syntax definition for the filetype
 func DetectFiletype(defs []*Def, filename string, firstLine []byte) *Def {
 	for _, d := range defs {
 		if d.ftdetect[0].MatchString(filename) {
diff --git a/highlighter.go b/highlighter.go
index 4b8abf0..5e4aa0b 100644
--- a/highlighter.go
+++ b/highlighter.go
@@ -35,13 +35,13 @@ type LineStates interface {
 // A Highlighter contains the information needed to highlight a string
 type Highlighter struct {
 	lastRegion *region
-	def        *Def
+	Def        *Def
 }
 
 // NewHighlighter returns a new highlighter from the given syntax definition
 func NewHighlighter(def *Def) *Highlighter {
 	h := new(Highlighter)
-	h.def = def
+	h.Def = def
 	return h
 }
 
@@ -178,7 +178,7 @@ func (h *Highlighter) highlightEmptyRegion(highlights LineMatch, start int, canM
 
 	firstLoc := []int{len(line), 0}
 	var firstRegion *region
-	for _, r := range h.def.rules.regions {
+	for _, r := range h.Def.rules.regions {
 		loc := findIndex(r.start, line, start == 0, canMatchEnd)
 		if loc != nil {
 			if loc[0] < firstLoc[0] {
@@ -205,7 +205,7 @@ func (h *Highlighter) highlightEmptyRegion(highlights LineMatch, start int, canM
 	}
 
 	fullHighlights := make([]Group, len(line))
-	for _, p := range h.def.rules.patterns {
+	for _, p := range h.Def.rules.patterns {
 		matches := findAllIndex(p.regex, line, start == 0, canMatchEnd)
 		for _, m := range matches {
 			for i := m[0]; i < m[1]; i++ {