diff --git a/datamodel/low/model_builder_test.go b/datamodel/low/model_builder_test.go
index 1989899..3ba6f3d 100644
--- a/datamodel/low/model_builder_test.go
+++ b/datamodel/low/model_builder_test.go
@@ -9,6 +9,7 @@ import (
 
 type hotdog struct {
 	Name            NodeReference[string]
+	ValueName       ValueReference[string]
 	Fat             NodeReference[int]
 	Ketchup         NodeReference[float32]
 	Mustard         NodeReference[float64]
@@ -46,6 +47,7 @@ func TestBuildModel_Mismatch(t *testing.T) {
 func TestBuildModel(t *testing.T) {
 
 	yml := `name: yummy
+valueName: yammy
 beef: true
 fat: 200
 ketchup: 200.45
@@ -106,9 +108,10 @@ there:
 	hd := hotdog{}
 	cErr := BuildModel(rootNode.Content[0], &hd)
 	assert.Equal(t, 200, hd.Fat.Value)
-	assert.Equal(t, 3, hd.Fat.ValueNode.Line)
+	assert.Equal(t, 4, hd.Fat.ValueNode.Line)
 	assert.Equal(t, true, hd.Grilled.Value)
 	assert.Equal(t, "yummy", hd.Name.Value)
+	assert.Equal(t, "yammy", hd.ValueName.Value)
 	assert.Equal(t, float32(200.45), hd.Ketchup.Value)
 	assert.Len(t, hd.Drinks, 3)
 	assert.Len(t, hd.Sides, 4)
@@ -119,7 +122,7 @@ there:
 	assert.Len(t, hd.MaxTempAlt, 5)
 	assert.Equal(t, int64(7392837462032342), hd.MaxTempHigh.Value)
 	assert.Equal(t, 2, hd.Temps[1].Value)
-	assert.Equal(t, 26, hd.Temps[1].ValueNode.Line)
+	assert.Equal(t, 27, hd.Temps[1].ValueNode.Line)
 	assert.Len(t, hd.UnknownElements.Value, 2)
 	assert.Len(t, hd.LotsOfUnknowns, 3)
 	assert.Len(t, hd.Where, 2)
diff --git a/datamodel/low/v2/swagger_test.go b/datamodel/low/v2/swagger_test.go
index 86baff0..169a4bb 100644
--- a/datamodel/low/v2/swagger_test.go
+++ b/datamodel/low/v2/swagger_test.go
@@ -59,6 +59,7 @@ func TestCreateDocument(t *testing.T) {
 	assert.Equal(t, "http://swagger.io", doc.ExternalDocs.Value.URL.Value)
 	assert.Equal(t, true, doc.FindExtension("x-pet").Value)
 	assert.Equal(t, true, doc.FindExtension("X-Pet").Value)
+	assert.NotNil(t, doc.GetExternalDocs())
 }
 
 func TestCreateDocument_Info(t *testing.T) {
diff --git a/datamodel/low/v3/components.go b/datamodel/low/v3/components.go
index 631f053..0e34fb4 100644
--- a/datamodel/low/v3/components.go
+++ b/datamodel/low/v3/components.go
@@ -194,7 +194,7 @@ type componentBuildResult[T any] struct {
 
 func extractComponentValues[T low.Buildable[N], N any](label string, root *yaml.Node,
 	skip chan bool, errorChan chan<- error, resultChan chan<- low.NodeReference[map[low.KeyReference[string]]low.ValueReference[T]], idx *index.SpecIndex) {
-	_, nodeLabel, nodeValue := utils.FindKeyNodeFull(label, root.Content)
+	_, nodeLabel, nodeValue := utils.FindKeyNodeFullTop(label, root.Content)
 	if nodeValue == nil {
 		skip <- true
 		return
diff --git a/datamodel/low/v3/components_test.go b/datamodel/low/v3/components_test.go
index deb363f..d0fc397 100644
--- a/datamodel/low/v3/components_test.go
+++ b/datamodel/low/v3/components_test.go
@@ -11,7 +11,8 @@ import (
 	"testing"
 )
 
-var testComponentsYaml = `components:
+var testComponentsYaml = `
+  x-pizza: crispy
   schemas:
     one:
       description: one of many
@@ -97,6 +98,9 @@ func TestComponents_Build_Success(t *testing.T) {
 	assert.Equal(t, "eighteen of many",
 		n.FindCallback("eighteen").Value.FindExpression("{raference}").Value.Post.Value.Description.Value)
 
+	assert.Equal(t, "7add1a6c63a354b1a8ffe22552c213fe26d1229beb0b0cbe7c7ca06e63f9a364",
+		low.GenerateHashString(&n))
+
 }
 
 func TestComponents_Build_Success_Skip(t *testing.T) {
@@ -119,7 +123,7 @@ func TestComponents_Build_Success_Skip(t *testing.T) {
 
 func TestComponents_Build_Fail(t *testing.T) {
 
-	yml := `components:
+	yml := `
   parameters: 
     schema:
       $ref: '#/this is a problem.'`
@@ -140,7 +144,7 @@ func TestComponents_Build_Fail(t *testing.T) {
 
 func TestComponents_Build_ParameterFail(t *testing.T) {
 
-	yml := `components:
+	yml := `
   parameters:
     pizza:
       schema:
@@ -162,7 +166,7 @@ func TestComponents_Build_ParameterFail(t *testing.T) {
 
 func TestComponents_Build_Fail_TypeFail(t *testing.T) {
 
-	yml := `components:
+	yml := `
   parameters: 
     - schema:
         $ref: #/this is a problem.`
@@ -178,7 +182,6 @@ func TestComponents_Build_Fail_TypeFail(t *testing.T) {
 
 	err = n.Build(idxNode.Content[0], idx)
 	assert.Error(t, err)
-
 }
 
 func TestComponents_Build_ExtensionTest(t *testing.T) {
@@ -201,3 +204,25 @@ headers:
 	assert.Equal(t, "seagull", n.FindExtension("x-curry").Value)
 
 }
+
+func TestComponents_Build_HashEmpty(t *testing.T) {
+
+	yml := `x-curry: seagull`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	var n Components
+	err := low.BuildModel(&idxNode, &n)
+	assert.NoError(t, err)
+
+	err = n.Build(idxNode.Content[0], idx)
+	assert.NoError(t, err)
+	assert.Equal(t, "seagull", n.FindExtension("x-curry").Value)
+
+	assert.Equal(t, "9cf2c6ab3f9ff7e5231fcb391c8af5c47406711d2ca366533f21a8bb2f67edfe",
+		low.GenerateHashString(&n))
+
+}
diff --git a/datamodel/low/v3/create_document_test.go b/datamodel/low/v3/create_document_test.go
index cca34bd..2e5797d 100644
--- a/datamodel/low/v3/create_document_test.go
+++ b/datamodel/low/v3/create_document_test.go
@@ -477,6 +477,9 @@ func TestCreateDocument_Component_Discriminator(t *testing.T) {
 	assert.Equal(t, "drinkType", dsc.PropertyName.Value)
 	assert.Equal(t, "some value", dsc.FindMappingValue("drink").Value)
 	assert.Nil(t, dsc.FindMappingValue("don't exist"))
+	assert.NotNil(t, doc.GetExternalDocs())
+	assert.Nil(t, doc.FindSecurityRequirement("scooby doo"))
+
 }
 
 func TestCreateDocument_CheckAdditionalProperties_Schema(t *testing.T) {
@@ -518,8 +521,21 @@ components:
 	assert.Error(t, ob.GetBuildError())
 }
 
+func TestCreateDocument_Webhooks_Error(t *testing.T) {
+	yml := `openapi: 3.0
+webhooks:
+  aHook:
+    $ref: #bork`
+
+	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
+	var err []error
+	doc, err = CreateDocument(info)
+	assert.Len(t, err, 1)
+}
+
 func TestCreateDocument_Components_Error_Extract(t *testing.T) {
-	yml := `components:
+	yml := `openapi: 3.0
+components:
   parameters:
     bork:
       $ref: #bork`
@@ -532,7 +548,8 @@ func TestCreateDocument_Components_Error_Extract(t *testing.T) {
 }
 
 func TestCreateDocument_Paths_Errors(t *testing.T) {
-	yml := `paths:
+	yml := `openapi: 3.0
+paths:
   /p:
     $ref: #bork`
 
@@ -543,7 +560,8 @@ func TestCreateDocument_Paths_Errors(t *testing.T) {
 }
 
 func TestCreateDocument_Tags_Errors(t *testing.T) {
-	yml := `tags:
+	yml := `openapi: 3.0
+tags:
   - $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
@@ -553,7 +571,8 @@ func TestCreateDocument_Tags_Errors(t *testing.T) {
 }
 
 func TestCreateDocument_Security_Error(t *testing.T) {
-	yml := `security:
+	yml := `openapi: 3.0
+security:
   $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
@@ -563,7 +582,8 @@ func TestCreateDocument_Security_Error(t *testing.T) {
 }
 
 func TestCreateDocument_ExternalDoc_Error(t *testing.T) {
-	yml := `externalDocs:
+	yml := `openapi: 3.0
+externalDocs:
   $ref: #bork`
 
 	info, _ := datamodel.ExtractSpecInfo([]byte(yml))
diff --git a/test_specs/burgershop.openapi-modified.yaml b/test_specs/burgershop.openapi-modified.yaml
new file mode 100644
index 0000000..fcfdfae
--- /dev/null
+++ b/test_specs/burgershop.openapi-modified.yaml
@@ -0,0 +1,548 @@
+openapi: 3.1.0
+info:
+  title: Burger Shop
+  description: |
+    The best burger API at princess beef. You can find the testiest burgers in the world
+  termsOfService: https://pb33f.io
+  contact:
+    name: pb33f
+    email: buckaroo@pb33f.io
+    url: https://pb33f.io
+  license:
+    name: pb33f
+    url: https://pb33f.io/made-up
+  version: "1.2"
+security:
+  - OAuthScheme:
+      - read:burgers
+      - write:burgers
+tags:
+  - name: "Burgers"
+    description: "All kinds of yummy burgers."
+    externalDocs:
+      description: "Find out more"
+      url: "https://pb33f.io"
+    x-internal-ting: somethingSpecial
+    x-internal-tong: 1
+    x-internal-tang: 1.2
+    x-internal-tung: true
+    x-internal-arr:
+      - one
+      - two
+    x-internal-arrmap:
+      - what: now
+      - why: that
+    x-something-else:
+      ok:
+        - what: now?
+  - name: "Dressing"
+    description: "Variety of dressings: cheese, veggie, oil and a lot more"
+    externalDocs:
+      description: "Find out more information about our products)"
+      url: "https://pb33f.io"
+servers:
+  - url: "{scheme}://api.pb33f.io"
+    description: "this is our main API server, for all fun API things."
+    variables:
+      scheme:
+        enum: [https, wss]
+        default: https
+        description: this is a server variable for the scheme
+  - url: "https://{domain}.{host}.com"
+    description: "this is our second API server, for all fun API things."
+    variables:
+      domain:
+        default: "api"
+        description: the default API domain is 'api'
+      host:
+        default: "pb33f.io"
+        description: the default host for this API is 'pb33f.io'
+paths:
+  x-milky-milk: milky
+  /burgers:
+    x-burger-meta: meaty
+    post:
+      operationId: createBurger
+      tags:
+        - "Burgers"
+      summary:  Create a new burger
+      description: A new burger for our menu, yummy yum yum.
+      requestBody:
+        $ref: '#/components/requestBodies/BurgerRequest'
+      responses:
+        "200":
+          headers:
+            UseOil:
+              $ref: '#/components/headers/UseOil'
+          description: A tasty burger for you to eat.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Burger'
+              examples:
+                quarterPounder:
+                  $ref: '#/components/examples/QuarterPounder'
+                filetOFish:
+                  summary: a cripsy fish sammich filled with ocean goodness.
+                  value:
+                    name: Filet-O-Fish
+                    numPatties: 1
+          links:
+            LocateBurger:
+              $ref: '#/components/links/LocateBurger'
+            AnotherLocateBurger:
+              $ref: '#/components/links/AnotherLocateBurger'
+        "500":
+          description: Unexpected error creating a new burger. Sorry.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              examples:
+                unexpectedError:
+                  summary: oh my goodness
+                  value:
+                    message: something went terribly wrong my friend, no new burger for you.
+        "422":
+          description: Unprocessable entity
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              examples:
+                unexpectedError:
+                  summary: invalid request
+                  value:
+                    message: unable to accept this request, looks bad, missing something.
+      security:
+        - OAuthScheme:
+            - read:burgers
+            - write:burgers
+      servers:
+        - url: https://pb33f.io
+          description: this is an alternative server for this operation.
+  /burgers/{burgerId}:
+    get:
+      callbacks:
+        burgerCallback:
+          $ref: '#/components/callbacks/BurgerCallback'
+      operationId: locateBurger
+      tags:
+        - "Burgers"
+      summary: Search a burger by ID - returns the burger with that identifier
+      description: Look up a tasty burger take it and enjoy it
+      parameters:
+        - $ref: '#/components/parameters/BurgerId'
+        - $ref: '#/components/parameters/BurgerHeader'
+      responses:
+        "200":
+          description: A tasty burger for you to eat. Wide variety of products to choose from
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Burger'
+              examples:
+                quarterPounder:
+                  $ref: '#/components/examples/QuarterPounder'
+                filetOFish:
+                  summary: A tasty treat from the sea
+                  value:
+                    name: Filet-O-Fish
+                    numPatties: 1
+          links:
+            ListBurgerDressings:
+              operationId: listBurgerDressings
+              parameters:
+                dressingId: 'something here'
+              description: 'Try the ketchup!'
+        "404":
+          description: Cannot find your burger. Sorry. We may have sold out of this type
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              examples:
+                notFound:
+                  summary: burger missing
+                  value:
+                    message: can't find a burger with that ID, we may have sold out my friend.
+        "500":
+          description: Unexpected error. Sorry.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              examples:
+                unexpectedError:
+                  summary: oh my stars
+                  value:
+                    message: something went terribly wrong my friend, burger location crashed!
+  /burgers/{burgerId}/dressings:
+    get:
+      operationId: listBurgerDressings
+      tags:
+        - "Dressing"
+      summary:  Get a list of all dressings available
+      description: Same as the summary, look up a tasty burger, by its ID - the burger identifier
+      parameters:
+        - in: path
+          name: burgerId
+          schema:
+            type: string
+          example: big-mac
+          description: the name of the our fantastic burger. You can pick a name from our menu
+          required: true
+      responses:
+        "200":
+          $ref: '#/components/responses/DressingResponse'
+        "404":
+          description: Cannot find your burger in which to list dressings. Sorry
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: There is no burger here
+        "500":
+          description: Unexpected error listing dressings for burger. Sorry.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: computer says no dressings for this burger.
+  /dressings/{dressingId}:
+    get:
+      operationId: getDressing
+      tags:
+        - "Dressing"
+      summary:  Get a specific dressing - you can choose the dressing from our menu
+      description: Same as the summary, get a dressing, by its ID
+      parameters:
+        - in: path
+          name: dressingId
+          schema:
+            type: string
+          example: cheese
+          description: This is the unique identifier for the dressing items.
+          required: true
+      responses:
+        "200":
+          description: a dressing
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Dressing'
+              example:
+                name: Butter Sauce
+        "404":
+          description: Cannot find your dressing, sorry.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: No such dressing as 'Pizza'
+        "500":
+          description: Unexpected error getting a dressing. Sorry.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: failed looking up dressing by ID, our server borked.
+  /dressings:
+    get:
+      operationId: getAllDressings
+      tags:
+        - "Dressing"
+      summary:  Get all dressings available in our store
+      description: Get all dressings and choose from them
+      responses:
+        "200":
+          description: an array of dressings
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Dressing'
+              example:
+                - name: Burger Sauce
+        "418":
+          description: I am a teapot.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: It's teapot time.
+        "500":
+          description: Something went wrong with getting dressings.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+              example:
+                message: "failed looking up all dressings, something went wrong."
+components:
+  callbacks:
+    BurgerCallback:
+      x-break-everything: please
+      "{$request.query.queryUrl}":
+        post:
+          requestBody:
+            description: Callback payload
+            content:
+              'application/json':
+                schema:
+                  $ref: '#/components/schemas/SomePayload'
+          responses:
+            '200':
+              description: callback successfully processes
+  links:
+    LocateBurger:
+      operationId: locateBurger
+      parameters:
+        burgerId: '$response.body#/id'
+      description: Go and get a tasty burger
+    AnotherLocateBurger:
+      operationId: locateBurger
+      parameters:
+        burgerId: '$response.body#/id'
+      description: Go and get another really tasty burger
+      server:
+        url: https://pb33f.io
+  headers:
+    UseOil:
+      description: this is a header example for UseOil
+      schema:
+        type: string
+  requestBodies:
+    BurgerRequest:
+      description: Give us the new burger!
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/Burger'
+          examples:
+            pbjBurger:
+              summary: A horrible, nutty, sticky mess.
+              value:
+                name: Peanut And Jelly
+                numPatties: 3
+            cakeBurger:
+              summary: A sickly, sweet, atrocity
+              value:
+                name: Chocolate Cake Burger
+                numPatties: 5
+  examples:
+    QuarterPounder:
+      summary: A juicy two hander sammich
+      value:
+        name: Quarter Pounder with Cheese
+        numPatties: 1
+  responses:
+    DressingResponse:
+      description: all the dressings for a burger.
+      content:
+        application/json:
+          schema:
+            type: array
+            items:
+              $ref: '#/components/schemas/Dressing'
+          example:
+            - name: Thousand Island
+  securitySchemes:
+    APIKeyScheme:
+      type: apiKey
+      description: an apiKey security scheme
+      name: apiKeyScheme
+      in: query
+    JWTScheme:
+      type: http
+      description: an JWT security scheme
+      name: aJWTThing
+      scheme: bearer
+      bearerFormat: JWT
+    OAuthScheme:
+      type: oauth2
+      description: an oAuth security scheme
+      name: oAuthy
+      flows:
+        implicit:
+          authorizationUrl: https://pb33f.io/oauth
+          scopes:
+            write:burgers: modify and add new burgers
+            read:burgers: read all burgers
+        authorizationCode:
+          authorizationUrl: https://pb33f.io/oauth
+          tokenUrl: https://api.pb33f.io/oauth/token
+          scopes:
+            write:burgers: modify burgers and stuff
+            read:burgers: read all the burgers
+  parameters:
+    BurgerHeader:
+      in: header
+      name: burgerHeader
+      schema:
+        properties:
+          burgerTheme:
+            type: string
+            description: something about a theme goes in here?
+          burgerTime:
+            type: number
+            description: number of burgers ordered so far this year.
+      example: big-mac
+      description: the name of the burger. use this to order your food
+      required: true
+      content:
+        application/json:
+          example: somethingNice
+          encoding:
+            burgerTheme:
+              contentType: text/plain
+              headers:
+                someHeader:
+                  description: this is a header
+                  schema:
+                    type: string
+          schema:
+            type: object
+            required: [burgerTheme, burgerTime]
+            properties:
+              burgerTheme:
+                type: string
+                description: something about a theme?
+              burgerTime:
+                type: number
+                description: number of burgers ordered this year.
+    BurgerId:
+      in: path
+      name: burgerId
+      schema:
+        type: string
+      example: big-mac
+      description: the name of the burger. use this to order your tasty burger
+      required: true
+  schemas:
+    Error:
+      type: object
+      description: Error defining what went wrong when providing a specification. The message should help indicate the issue clearly.
+      properties:
+        message:
+          type: string
+          description: returns the error message if something wrong happens
+          example: No such burger as 'Big-Whopper'
+    Burger:
+      type: object
+      description: The tastiest food on the planet you would love to eat everyday
+      required:
+        - name
+        - numPatties
+      properties:
+        name:
+          type: string
+          description: The name of your tasty burger - burger names are listed in our menus
+          example: Big Mac
+        numPatties:
+          type: integer
+          description: The number of burger patties used
+          example: 2
+        numTomatoes:
+          type: integer
+          description: how many slices of orange goodness would you like?
+          example: 1
+        fries:
+          $ref: '#/components/schemas/Fries'
+    Fries:
+      type: object
+      description: golden slices of happy fun joy
+      required:
+        - potatoShape
+        - favoriteDrink
+      properties:
+        seasoning:
+          type: array
+          description: herbs and spices for your golden joy
+          items:
+            type: string
+            description: type of herb or spice used to liven up the yummy
+            example: salt
+        potatoShape:
+          type: string
+          description: what type of potato shape? wedges? shoestring?
+          example: Crispy Shoestring
+        favoriteDrink:
+          $ref: '#/components/schemas/Drink'
+    Dressing:
+      type: object
+      description: This is the object that contains the information about the content of the dressing
+      required:
+        - name
+      properties:
+        name:
+          type: string
+          description: The name of your dressing you can pick up from the menu
+          example: Cheese
+      additionalProperties:
+        type: object
+        description: something in here.
+    Drink:
+      type: object
+      description: a frosty cold beverage can be coke or sprite
+      required:
+        - size
+        - drinkType
+      properties:
+        ice:
+          type: boolean
+        drinkType:
+          description: select from coke or sprite
+          enum:
+            - coke
+            - sprite
+        size:
+          type: string
+          description: what size man? S/M/L
+          example: M
+      additionalProperties: true
+      discriminator:
+        propertyName: drinkType
+        mapping:
+          drink: some value
+    SomePayload:
+      type: string
+      description: some kind of payload for something.
+      xml:
+        name: is html programming? yes.
+      externalDocs:
+        url: https://pb33f.io/docs
+      oneOf:
+        - $ref: '#/components/schemas/Drink'
+      anyOf:
+        - $ref: '#/components/schemas/Drink'
+      allOf:
+        - $ref: '#/components/schemas/Drink'
+      not:
+        type: string
+      items:
+        - $ref: '#/components/schemas/Drink'
+  x-screaming-baby: loud
+x-something-something: darkside
+externalDocs:
+  description: "Find out more information about our products and services"
+  url: "https://pb33f.io"
+jsonSchemaDialect: https://pb33f.io/schema
+webhooks:
+  someHook:
+    post:
+      requestBody:
+        description: Information about a new burger
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Burger"
+      responses:
+        "200":
+          description: the hook is good! you have a new burger.
\ No newline at end of file
diff --git a/test_specs/circular-tests.yaml b/test_specs/circular-tests.yaml
index 815e8e6..1b1cb14 100644
--- a/test_specs/circular-tests.yaml
+++ b/test_specs/circular-tests.yaml
@@ -31,7 +31,7 @@ components:
         yester:
           "$ref": "#/components/schemas/Seven"
     Four:
-      desription: "test four"
+      description: "test four"
       properties:
         lemons:
           "$ref": "#/components/schemas/Nine"
diff --git a/what-changed/model/components.go b/what-changed/model/components.go
index c66896f..4cea55b 100644
--- a/what-changed/model/components.go
+++ b/what-changed/model/components.go
@@ -100,10 +100,6 @@ func CompareComponents(l, r any) *ComponentsChanges {
 		lComponents := l.(*v3.Components)
 		rComponents := r.(*v3.Components)
 
-		if lComponents == nil && rComponents == nil {
-			return nil
-		}
-
 		if low.AreEqual(lComponents, rComponents) {
 			return nil
 		}
diff --git a/what-changed/model/document.go b/what-changed/model/document.go
index e430104..7485af5 100644
--- a/what-changed/model/document.go
+++ b/what-changed/model/document.go
@@ -203,6 +203,14 @@ func CompareDocuments(l, r any) *DocumentChanges {
 				dc.ComponentsChanges = n
 			}
 		}
+		if !lDoc.Components.IsEmpty() && rDoc.Components.IsEmpty() {
+			CreateChange(&changes, PropertyRemoved, v3.ComponentsLabel,
+				lDoc.Components.ValueNode, nil, true, lDoc.Components.Value, nil)
+		}
+		if lDoc.Components.IsEmpty() && !rDoc.Components.IsEmpty() {
+			CreateChange(&changes, PropertyAdded, v3.ComponentsLabel,
+				rDoc.Components.ValueNode, nil, false, nil, lDoc.Components.Value)
+		}
 
 		// compare servers
 		if n := checkServers(lDoc.Servers, rDoc.Servers, &changes); n != nil {
@@ -210,7 +218,10 @@ func CompareDocuments(l, r any) *DocumentChanges {
 		}
 
 		// compare webhooks
-		CheckMapForChanges(lDoc.Webhooks.Value, rDoc.Webhooks.Value, &changes, v3.WebhooksLabel, ComparePathItemsV3)
+		dc.WebhookChanges = CheckMapForChanges(lDoc.Webhooks.Value, rDoc.Webhooks.Value, &changes,
+			v3.WebhooksLabel, ComparePathItemsV3)
+
+		// extensions
 		dc.ExtensionChanges = CompareExtensions(lDoc.Extensions, rDoc.Extensions)
 	}
 
diff --git a/what-changed/model/document_test.go b/what-changed/model/document_test.go
index a997d1f..09d7401 100644
--- a/what-changed/model/document_test.go
+++ b/what-changed/model/document_test.go
@@ -216,6 +216,8 @@ externalDocs:
 	assert.Equal(t, 0, extChanges.TotalBreakingChanges())
 	assert.Equal(t, v3.ExternalDocsLabel, extChanges.Changes[0].Property)
 	assert.Equal(t, PropertyAdded, extChanges.Changes[0].ChangeType)
+	assert.NotNil(t, lDoc.GetExternalDocs())
+
 }
 
 func TestCompareDocuments_Swagger_ExternalDocs_Removed(t *testing.T) {
@@ -724,6 +726,8 @@ jsonSchemaDialect: https://pb33f.io/schema`
 	// compare.
 	extChanges := CompareDocuments(&lDoc, &rDoc)
 	assert.Nil(t, extChanges)
+	assert.NotNil(t, lDoc.GetExternalDocs())
+	assert.Nil(t, lDoc.FindSecurityRequirement("chewy")) // because why not.
 }
 
 func TestCompareDocuments_OpenAPI_BaseProperties_Modified(t *testing.T) {
@@ -753,3 +757,240 @@ jsonSchemaDialect: https://pb33f.io/schema/changed`
 	assert.Equal(t, 3, extChanges.TotalChanges())
 	assert.Equal(t, 2, extChanges.TotalBreakingChanges())
 }
+
+func TestCompareDocuments_OpenAPI_AddComponents(t *testing.T) {
+
+	left := `openapi: 3.1`
+
+	right := `openapi: 3.1
+components:
+  schemas:
+    thing:
+      type: int`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+
+	assert.Equal(t, 1, extChanges.TotalChanges())
+	assert.Equal(t, 0, extChanges.TotalBreakingChanges())
+	assert.Equal(t, PropertyAdded, extChanges.Changes[0].ChangeType)
+}
+
+func TestCompareDocuments_OpenAPI_Removed(t *testing.T) {
+
+	left := `openapi: 3.1`
+
+	right := `openapi: 3.1
+components:
+  schemas:
+    thing:
+      type: int`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(rDoc, lDoc)
+
+	assert.Equal(t, 1, extChanges.TotalChanges())
+	assert.Equal(t, 1, extChanges.TotalBreakingChanges())
+	assert.Equal(t, PropertyRemoved, extChanges.Changes[0].ChangeType)
+}
+
+func TestCompareDocuments_OpenAPI_ModifyPaths(t *testing.T) {
+
+	left := `openapi: 3.1
+paths:
+  /brown/cow:
+    get:
+      description: brown cow
+  /brown/hen:
+    get:
+      description: brown hen`
+
+	right := `openapi: 3.1
+paths:
+  /brown/cow:
+    get:
+      description: brown cow modified
+  /brown/hen:
+    get:
+      description: brown hen modified`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+
+	assert.Equal(t, 2, extChanges.TotalChanges())
+	assert.Equal(t, 0, extChanges.TotalBreakingChanges())
+}
+
+func TestCompareDocuments_OpenAPI_Identical_Security(t *testing.T) {
+
+	left := `openapi: 3.1
+security:
+  - cakes:
+    - chocolate
+    - vanilla
+  - shoes:
+    - white
+    - black`
+
+	right := `openapi: 3.1
+security:
+  - shoes:
+    - black
+    - white
+  - cakes:
+    - vanilla
+    - chocolate `
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+	assert.Nil(t, extChanges)
+}
+
+func TestCompareDocuments_OpenAPI_ModifyComponents(t *testing.T) {
+
+	left := `openapi: 3.1
+components:
+  schemas:
+    athing:
+      description: a schema
+    nothing:
+      description: nothing`
+
+	right := `openapi: 3.1
+components:
+  schemas:
+    athing:
+      description: a schema that changed
+    nothing:
+      description: nothing with an update`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+
+	assert.Equal(t, 2, extChanges.TotalChanges())
+	assert.Equal(t, 0, extChanges.TotalBreakingChanges())
+}
+
+func TestCompareDocuments_OpenAPI_ModifyServers(t *testing.T) {
+
+	left := `openapi: 3.1
+servers:
+  - url: https://pb33f.io
+  - url: https://quobix.com`
+
+	right := `openapi: 3.1
+servers:
+  - url: https://pb33f.io
+    description: hello!
+  - url: https://api.pb33f.io`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+
+	assert.Equal(t, 3, extChanges.TotalChanges())
+	assert.Equal(t, 1, extChanges.TotalBreakingChanges())
+}
+
+func TestCompareDocuments_OpenAPI_ModifyWebhooks(t *testing.T) {
+
+	left := `openapi: 3.1
+webhooks:
+  bHook:
+    get:
+      description: coffee  
+  aHook:
+    get:
+      description: jazz`
+
+	right := `openapi: 3.1
+webhooks:
+  bHook:
+    get:
+      description: coffee in the morning
+  aHook:
+    get:
+      description: jazz in the evening`
+
+	var lNode, rNode yaml.Node
+	_ = yaml.Unmarshal([]byte(left), &lNode)
+	_ = yaml.Unmarshal([]byte(right), &rNode)
+
+	// have to build docs fully to get access to objects
+	siLeft, _ := datamodel.ExtractSpecInfo([]byte(left))
+	siRight, _ := datamodel.ExtractSpecInfo([]byte(right))
+
+	lDoc, _ := v3.CreateDocument(siLeft)
+	rDoc, _ := v3.CreateDocument(siRight)
+
+	// compare.
+	extChanges := CompareDocuments(lDoc, rDoc)
+
+	assert.Equal(t, 2, extChanges.TotalChanges())
+	assert.Equal(t, 0, extChanges.TotalBreakingChanges())
+}
diff --git a/what-changed/model/tags_test.go b/what-changed/model/tags_test.go
index 9da63ae..bf8d37a 100644
--- a/what-changed/model/tags_test.go
+++ b/what-changed/model/tags_test.go
@@ -265,3 +265,59 @@ tags:
 	assert.Nil(t, changes)
 
 }
+
+func TestCompareTags_AddExternalDocs(t *testing.T) {
+
+	left := `openapi: 3.0.1
+tags:
+  - name: something else`
+
+	right := `openapi: 3.0.1
+tags:
+  - name: something else
+    externalDocs:
+      url: https://pb33f.io
+      description: cooler`
+
+	// create document (which will create our correct tags low level structures)
+	lInfo, _ := datamodel.ExtractSpecInfo([]byte(left))
+	rInfo, _ := datamodel.ExtractSpecInfo([]byte(right))
+	lDoc, _ := lowv3.CreateDocument(lInfo)
+	rDoc, _ := lowv3.CreateDocument(rInfo)
+
+	// compare.
+	changes := CompareTags(lDoc.Tags.Value, rDoc.Tags.Value)
+
+	// evaluate.
+	assert.Equal(t, 1, changes.TotalChanges())
+	assert.Equal(t, ObjectAdded, changes.Changes[0].ChangeType)
+
+}
+
+func TestCompareTags_RemoveExternalDocs(t *testing.T) {
+
+	left := `openapi: 3.0.1
+tags:
+  - name: something else`
+
+	right := `openapi: 3.0.1
+tags:
+  - name: something else
+    externalDocs:
+      url: https://pb33f.io
+      description: cooler`
+
+	// create document (which will create our correct tags low level structures)
+	lInfo, _ := datamodel.ExtractSpecInfo([]byte(left))
+	rInfo, _ := datamodel.ExtractSpecInfo([]byte(right))
+	lDoc, _ := lowv3.CreateDocument(lInfo)
+	rDoc, _ := lowv3.CreateDocument(rInfo)
+
+	// compare.
+	changes := CompareTags(rDoc.Tags.Value, lDoc.Tags.Value)
+
+	// evaluate.
+	assert.Equal(t, 1, changes.TotalChanges())
+	assert.Equal(t, ObjectRemoved, changes.Changes[0].ChangeType)
+
+}
diff --git a/what-changed/what_changed.go b/what-changed/what_changed.go
index 6e78fbd..6c6d068 100644
--- a/what-changed/what_changed.go
+++ b/what-changed/what_changed.go
@@ -3,3 +3,16 @@
 
 package what_changed
 
+import (
+	"github.com/pb33f/libopenapi/datamodel/low/v2"
+	"github.com/pb33f/libopenapi/datamodel/low/v3"
+	"github.com/pb33f/libopenapi/what-changed/model"
+)
+
+func CompareOpenAPIDocuments(original, updated *v3.Document) *model.DocumentChanges {
+	return model.CompareDocuments(original, updated)
+}
+
+func CompareSwaggerDocuments(original, updated *v2.Swagger) *model.DocumentChanges {
+	return model.CompareDocuments(original, updated)
+}
diff --git a/what-changed/what_changed_test.go b/what-changed/what_changed_test.go
index 0a95109..9726507 100644
--- a/what-changed/what_changed_test.go
+++ b/what-changed/what_changed_test.go
@@ -2,3 +2,19 @@
 // SPDX-License-Identifier: MIT
 
 package what_changed
+
+//func TestCompareOpenAPIDocuments(t *testing.T) {
+//
+//    original, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
+//    modified, _ := ioutil.ReadFile("../test_specs/burgershop.openapi-modified.yaml")
+//    infoOrig, _ := datamodel.ExtractSpecInfo(original)
+//    infoMod, _ := datamodel.ExtractSpecInfo(modified)
+//
+//    origDoc, _ := v3.CreateDocument(infoOrig)
+//    modDoc, _ := v3.CreateDocument(infoMod)
+//
+//    changes := CompareOpenAPIDocuments(origDoc, modDoc)
+//
+//    assert.Nil(t, changes)
+//
+//}