diff --git a/documentation.go b/documentation.go
index b94cc74..0733d85 100644
--- a/documentation.go
+++ b/documentation.go
@@ -8,9 +8,17 @@ import (
 )
 
 type DocEndpointHttpProtocol map[string]DocEndpoint
+type DocEndpointProduces string
 type DocEndpointParameterIn string
 type DocEndpointType string
 
+const (
+	DocEndpointProducesJson DocEndpointProduces = "application/json"
+	DocEndpointProducesXml  DocEndpointProduces = "application/xml"
+	DocEndpointProducesYaml DocEndpointProduces = "application/yaml"
+	DocEndpointProducesText DocEndpointProduces = "text/plain"
+)
+
 const (
 	DocEndpointParameterInQuery  DocEndpointParameterIn = "query"
 	DocEndpointParameterInPath   DocEndpointParameterIn = "path"
@@ -49,24 +57,28 @@ type DocEndpoint struct {
 	OperationId string                           `json:"operationId"`
 	Responses   map[int]DocEndpointResponse      `json:"responses"`
 	Parameters  []DocEndpointParameter           `json:"parameters,omitempty"`
+	Produces    []DocEndpointProduces            `json:"produces,omitempty"`
 	Definitions map[string]DocEndpointDefinition `json:"-"`
 
 	ParsedTags []string `json:"tags,omitempty"`
 }
 
 type DocEndpointResponse struct {
-	Description string            `json:"description"`
-	Schema      map[string]string `json:"schema,omitempty"`
+	Description string                          `json:"description"`
+	Schema      DocEndpointSchema               `json:"schema,omitempty"`
+	Headers     map[string]DocEndpointParameter `json:"headers,omitempty"`
 }
 
 type DocEndpointParameter struct {
-	In       DocEndpointParameterIn `json:"in,omitempty"`
-	Name     string                 `json:"name,omitempty"`
-	Required bool                   `json:"required,omitempty"`
-	Type     DocEndpointType        `json:"type,omitempty"`
-	Enum     []string               `json:"enum,omitempty"`
-	Format   string                 `json:"format,omitempty"`
-	Schema   map[string]string      `json:"schema,omitempty"`
+	In          DocEndpointParameterIn   `json:"in,omitempty"`
+	Name        string                   `json:"name,omitempty"`
+	Description string                   `json:"description,omitempty"`
+	Required    bool                     `json:"required,omitempty"`
+	Type        DocEndpointType          `json:"type,omitempty"`
+	Enum        []string                 `json:"enum,omitempty"`
+	Format      string                   `json:"format,omitempty"`
+	Items       DocEndpointParameterItem `json:"items,omitempty"`
+	Schema      DocEndpointSchema        `json:"schema,omitempty"`
 }
 
 type DocEndpointDefinition struct {
@@ -74,6 +86,19 @@ type DocEndpointDefinition struct {
 	Properties map[string]DocEndpointParameter `json:"properties"`
 }
 
+type DocEndpointParameterItem struct {
+	Type   DocEndpointType `json:"type,omitempty"`
+	Enum   []string        `json:"enum,omitempty"`
+	Format string          `json:"format,omitempty"`
+	Ref    string          `json:"$ref,omitempty"`
+}
+
+type DocEndpointSchema struct {
+	Type                 string `json:"type"`
+	Ref                  string `json:"$ref"`
+	AdditionalProperties bool   `json:"additionalProperties,omitempty"`
+}
+
 func NewDocApp(title string, version string) DocApp {
 	return DocApp{
 		Swagger: "2.0",
diff --git a/documentation_test.go b/documentation_test.go
index 91c9bc9..81f1afe 100644
--- a/documentation_test.go
+++ b/documentation_test.go
@@ -132,8 +132,8 @@ func Test_AddEndpointToDocs_EndpointDefinitions(t *testing.T) {
 				{
 					In:   DocEndpointParameterInBody,
 					Name: "body",
-					Schema: map[string]string{
-						"$ref": "#/definitions/TestObject",
+					Schema: DocEndpointSchema{
+						Ref: "#/definitions/TestObject",
 					},
 				},
 			},
@@ -161,8 +161,8 @@ func Test_AddEndpointToDocs_EndpointDefinitions(t *testing.T) {
 						{
 							In:   DocEndpointParameterInBody,
 							Name: "body",
-							Schema: map[string]string{
-								"$ref": "#/definitions/TestObject",
+							Schema: DocEndpointSchema{
+								Ref: "#/definitions/TestObject",
 							},
 						},
 					},
diff --git a/examples/swagger.go b/examples/swagger.go
index e97856e..0c9bc1e 100644
--- a/examples/swagger.go
+++ b/examples/swagger.go
@@ -56,8 +56,8 @@ func main() {
 				{
 					Name: "body",
 					In:   geh.DocEndpointParameterInBody,
-					Schema: map[string]string{
-						"$ref": "#/definitions/TestObject",
+					Schema: geh.DocEndpointSchema{
+						Ref: "#/definitions/TestObject",
 					},
 				},
 			},