diff --git a/atom.go b/atom.go
index b2dab84..55d0532 100644
--- a/atom.go
+++ b/atom.go
@@ -11,10 +11,6 @@ import (
 	"golang.org/x/text/language"
 )
 
-func Unescape(s string) string {
-	return html.UnescapeString(s)
-}
-
 // isValidIRI checks whether an IRI is valid or not. It returns a bool.
 // https://www.w3.org/2011/04/XMLSchema/TypeLibrary-IRI-RFC3987.xsd
 func isValidIRI(iri string) bool {
@@ -22,15 +18,6 @@ func isValidIRI(iri string) bool {
 	return regexp.MustCompile(pattern).MatchString(iri)
 }
 
-// NewIRI creates a new IRI. It returns a string and an error.
-func NewIRI(iri string) (string, error) {
-	if !isValidIRI(iri) {
-		return "", fmt.Errorf("iri %v not correctly formatted", iri)
-	}
-
-	return iri, nil
-}
-
 // isCorrectlyEscaped checks whether a string is correctly escaped as per
 // RFC4287. It returns a bool.
 func isCorrectlyEscaped(text string) bool {
@@ -83,31 +70,12 @@ func isValidMediaType(m string) bool {
 	return true
 }
 
-// NewMediaType creates a new MediaType. It returns a string and an error.
-func NewMediaType(m string) (string, error) {
-	if !isValidMediaType(m) {
-		return "", fmt.Errorf("media type %v invalid", m)
-	}
-
-	mediaType, _, _ := mime.ParseMediaType(m)
-	return mediaType, nil
-}
-
 // isValidLanguageTag checks whether a LanguageTag is valid. It returns a bool.
 func isValidLanguageTag(languageTag string) bool {
 	_, err := language.Parse(languageTag)
 	return err == nil
 }
 
-// NewLanguageTag creates a new LanguageTag. It returns a string and an error.
-func NewLanguageTag(l string) (string, error) {
-	if !isValidLanguageTag(l) {
-		return "", fmt.Errorf("language tag %v invalid", l)
-	}
-
-	return l, nil
-}
-
 // isValidAttribute checks whether an Attribute is valid. It returns a bool.
 func isValidAttribute(attribute string) bool {
 	regex := regexp.MustCompile(`^[a-zA-Z0-9_]+="[^"]*"$`)
@@ -118,3 +86,8 @@ func isValidAttribute(attribute string) bool {
 func NewURN() string {
 	return fmt.Sprint("urn:uuid:", uuid.New())
 }
+
+// Unescape unescapes a string. It returns an IRI.
+func Unescape(s string) string {
+	return html.UnescapeString(s)
+}