diff --git a/datamodel/low/extraction_functions.go b/datamodel/low/extraction_functions.go
index 6ccdda7..0197422 100644
--- a/datamodel/low/extraction_functions.go
+++ b/datamodel/low/extraction_functions.go
@@ -13,6 +13,8 @@ import (
 	"strings"
 )
 
+// FindItemInMap accepts a string key and a collection of KeyReference[string] and ValueReference[T]. Every
+// KeyReference will have its value checked against the string key and if there is a match, it will be returned.
 func FindItemInMap[T any](item string, collection map[KeyReference[string]]ValueReference[T]) *ValueReference[T] {
 	for n, o := range collection {
 		if n.Value == item {
@@ -25,6 +27,7 @@ func FindItemInMap[T any](item string, collection map[KeyReference[string]]Value
 	return nil
 }
 
+// helper function to generate a list of all the things an index should be searched for.
 func generateIndexCollection(idx *index.SpecIndex) []func() map[string]*index.Reference {
 	return []func() map[string]*index.Reference{
 		idx.GetAllSchemas,
@@ -42,6 +45,8 @@ func generateIndexCollection(idx *index.SpecIndex) []func() map[string]*index.Re
 	}
 }
 
+// LocateRefNode will perform a complete lookup for a $ref node. This function searches the entire index for
+// the reference being supplied. If there is a match found, the reference *yaml.Node is returned.
 func LocateRefNode(root *yaml.Node, idx *index.SpecIndex) (*yaml.Node, error) {
 	if rf, _, rv := utils.IsNodeRefValue(root); rf {
 		// run through everything and return as soon as we find a match.
@@ -72,15 +77,8 @@ func LocateRefNode(root *yaml.Node, idx *index.SpecIndex) (*yaml.Node, error) {
 					if !IsCircular(found[rv].Node, idx) {
 						return LocateRefNode(found[rv].Node, idx)
 					} else {
-						//Log.Error("circular reference found during lookup, and will remain un-resolved.",
-						//	zap.Int("line", found[rv].Node.Line),
-						//	zap.Int("column", found[rv].Node.Column),
-						//	zap.String("reference", found[rv].Definition),
-						//	zap.String("journey",
-						//		GetCircularReferenceResult(found[rv].Node, idx).GenerateJourneyPath()))
-
-						return found[rv].Node, fmt.Errorf("circular reference '%s' found during lookup at line %d, column %d, "+
-							"It cannot be resolved",
+						return found[rv].Node, fmt.Errorf("circular reference '%s' found during lookup at line "+
+							"%d, column %d, It cannot be resolved",
 							GetCircularReferenceResult(found[rv].Node, idx).GenerateJourneyPath(),
 							found[rv].Node.Line,
 							found[rv].Node.Column)
@@ -104,11 +102,14 @@ func LocateRefNode(root *yaml.Node, idx *index.SpecIndex) (*yaml.Node, error) {
 				}
 			}
 		}
-		return nil, fmt.Errorf("reference '%s' at line %d, column %d was not found", root.Value, root.Line, root.Column)
+		return nil, fmt.Errorf("reference '%s' at line %d, column %d was not found",
+			root.Value, root.Line, root.Column)
 	}
 	return nil, nil
 }
 
+// ExtractObjectRaw will extract a typed Buildable[N] object from a root yaml.Node. The 'raw' aspect is
+// that there is no NodeReference wrapper around the result returned, just the raw object.
 func ExtractObjectRaw[T Buildable[N], N any](root *yaml.Node, idx *index.SpecIndex) (T, error) {
 	var circError error
 	if h, _, _ := utils.IsNodeRefValue(root); h {
@@ -133,12 +134,15 @@ func ExtractObjectRaw[T Buildable[N], N any](root *yaml.Node, idx *index.SpecInd
 	if err != nil {
 		return n, err
 	}
+	// do we want to throw an error as well if circular error reporting is on?
 	if circError != nil && !idx.AllowCircularReferenceResolving() {
 		return n, circError
 	}
 	return n, nil
 }
 
+// ExtractObject will extract a typed Buildable[N] object from a root yaml.Node. The result is wrapped in a
+// NodeReference[T] that contains the key node found and value node found when looking up the reference.
 func ExtractObject[T Buildable[N], N any](label string, root *yaml.Node, idx *index.SpecIndex) (NodeReference[T], error) {
 	var ln, vn *yaml.Node
 	var circError error
@@ -190,12 +194,15 @@ func ExtractObject[T Buildable[N], N any](label string, root *yaml.Node, idx *in
 		KeyNode:   ln,
 		ValueNode: vn,
 	}
+	// do we want to throw an error as well if circular error reporting is on?
 	if circError != nil && !idx.AllowCircularReferenceResolving() {
 		return res, circError
 	}
 	return res, nil
 }
 
+// ExtractArray will extract a slice of []ValueReference[T] from a root yaml.Node that is defined as a sequence.
+// Used when the value being extracted is an array.
 func ExtractArray[T Buildable[N], N any](label string, root *yaml.Node, idx *index.SpecIndex) ([]ValueReference[T],
 	*yaml.Node, *yaml.Node, error) {
 	var ln, vn *yaml.Node
@@ -266,12 +273,15 @@ func ExtractArray[T Buildable[N], N any](label string, root *yaml.Node, idx *ind
 			})
 		}
 	}
+	// include circular errors?
 	if circError != nil && !idx.AllowCircularReferenceResolving() {
 		return items, ln, vn, circError
 	}
 	return items, ln, vn, nil
 }
 
+// ExtractExample will extract a value supplied as an example into a NodeReference. Value can be anything.
+// the node value is untyped, so casting will be required when trying to use it.
 func ExtractExample(expNode, expLabel *yaml.Node) NodeReference[any] {
 	ref := NodeReference[any]{Value: expNode.Value, KeyNode: expLabel, ValueNode: expNode}
 	if utils.IsNodeMap(expNode) {
@@ -287,7 +297,15 @@ func ExtractExample(expNode, expLabel *yaml.Node) NodeReference[any] {
 	return ref
 }
 
-func ExtractMapFlatNoLookup[PT Buildable[N], N any](root *yaml.Node, idx *index.SpecIndex) (map[KeyReference[string]]ValueReference[PT], error) {
+// ExtractMapNoLookup will extract a map of KeyReference and ValueReference from a root yaml.Node. The 'NoLookup' part
+// refers to the fact that there is no key supplied as part of the extraction, there  is no lookup performed and the
+// root yaml.Node pointer is used directly.
+//
+// This is useful when the node to be extracted, is already known and does not require a search.
+func ExtractMapNoLookup[PT Buildable[N], N any](
+	root *yaml.Node,
+	idx *index.SpecIndex) (map[KeyReference[string]]ValueReference[PT], error) {
+
 	valueMap := make(map[KeyReference[string]]ValueReference[PT])
 	var circError error
 	if utils.IsNodeMap(root) {
@@ -350,7 +368,16 @@ type mappingResult[T any] struct {
 	v ValueReference[T]
 }
 
-func ExtractMapFlat[PT Buildable[N], N any](label string, root *yaml.Node, idx *index.SpecIndex) (map[KeyReference[string]]ValueReference[PT], *yaml.Node, *yaml.Node, error) {
+// ExtractMap will extract a map of KeyReference and ValueReference from a root yaml.Node. The 'label' is
+// used to locate the node to be extracted from the root node supplied.
+//
+// The second return value is the yaml.Node found for the 'label' and the third return value is the yaml.Node
+// found for the value extracted from the label node.
+func ExtractMap[PT Buildable[N], N any](
+	label string,
+	root *yaml.Node,
+	idx *index.SpecIndex) (map[KeyReference[string]]ValueReference[PT], *yaml.Node, *yaml.Node, error) {
+
 	var labelNode, valueNode *yaml.Node
 	var circError error
 	if rf, rl, _ := utils.IsNodeRefValue(root); rf {
@@ -459,6 +486,14 @@ func ExtractMapFlat[PT Buildable[N], N any](label string, root *yaml.Node, idx *
 	return nil, labelNode, valueNode, nil
 }
 
+// ExtractExtensions will extract any 'x-' prefixed key nodes from a root node into a map. Values have been pre-cast:
+//
+// Maps
+//   map[string]interface{} for maps
+// Slices
+//   []interface{}
+// int, float, bool, string
+//   int64, float64, bool, string
 func ExtractExtensions(root *yaml.Node) map[KeyReference[string]]ValueReference[any] {
 	extensions := utils.FindExtensionNodes(root.Content)
 	extensionMap := make(map[KeyReference[string]]ValueReference[any])
diff --git a/datamodel/low/extraction_functions_test.go b/datamodel/low/extraction_functions_test.go
index 9b0e6de..0b5944a 100644
--- a/datamodel/low/extraction_functions_test.go
+++ b/datamodel/low/extraction_functions_test.go
@@ -942,7 +942,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_Good](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_Good](cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
@@ -968,7 +968,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_Good](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_Good](cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
@@ -994,7 +994,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_Good](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_Good](cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1026,7 +1026,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_Good](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_Good](cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 1)
 
@@ -1052,7 +1052,7 @@ hello:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_noGood](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_noGood](cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1078,7 +1078,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, err := ExtractMapFlatNoLookup[*test_almostGood](cNode.Content[0], idx)
+	things, err := ExtractMapNoLookup[*test_almostGood](cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1101,7 +1101,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
@@ -1128,7 +1128,7 @@ one:
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
@@ -1159,7 +1159,7 @@ func TestExtractMapFlat_DoubleRef(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
@@ -1189,7 +1189,7 @@ func TestExtractMapFlat_DoubleRef_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_almostGood]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_almostGood]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1216,7 +1216,7 @@ func TestExtractMapFlat_DoubleRef_Error_NotFound(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_almostGood]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_almostGood]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1248,7 +1248,7 @@ func TestExtractMapFlat_DoubleRef_Circles(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 1)
 
@@ -1275,7 +1275,7 @@ func TestExtractMapFlat_Ref_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_almostGood]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_almostGood]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 
@@ -1305,7 +1305,7 @@ func TestExtractMapFlat_Ref_Circ_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 1)
 }
@@ -1335,7 +1335,7 @@ func TestExtractMapFlat_Ref_Nested_Circ_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 1)
 }
@@ -1361,7 +1361,7 @@ func TestExtractMapFlat_Ref_Nested_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 }
@@ -1387,7 +1387,7 @@ func TestExtractMapFlat_BadKey_Ref_Nested_Error(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("not-even-there", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("not-even-there", cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 0)
 }
@@ -1416,7 +1416,7 @@ func TestExtractMapFlat_Ref_Bad(t *testing.T) {
 	e := yaml.Unmarshal([]byte(yml), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.Error(t, err)
 	assert.Len(t, things, 0)
 }
@@ -1447,7 +1447,7 @@ func TestLocateRefNode_RemoteFile(t *testing.T) {
 	e := yaml.Unmarshal([]byte(ymlLocal), &cNode)
 	assert.NoError(t, e)
 
-	things, _, _, err := ExtractMapFlat[*test_Good]("one", cNode.Content[0], idx)
+	things, _, _, err := ExtractMap[*test_Good]("one", cNode.Content[0], idx)
 	assert.NoError(t, err)
 	assert.Len(t, things, 1)
 
diff --git a/datamodel/low/log.go b/datamodel/low/log.go
deleted file mode 100644
index 5482145..0000000
--- a/datamodel/low/log.go
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
-// SPDX-License-Identifier: MIT
-
-package low
-
-//import "go.uber.org/zap"
-//
-//var Log *zap.Logger
-//
-//func init() {
-//	Log, _ = zap.NewProduction()
-//}
diff --git a/datamodel/low/low.go b/datamodel/low/low.go
new file mode 100644
index 0000000..8a3d1e0
--- /dev/null
+++ b/datamodel/low/low.go
@@ -0,0 +1,14 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+// Package low contains a set of low-level models that represent OpenAPI 2 and 3 documents.
+// These low-level models (plumbing) are used to create high-level models, and used when deep knowledge
+// about the original data, positions, comments and the original node structures.
+//
+// Low-level models are not designed to be easily navigated, every single property is either a NodeReference
+// an KeyReference or a ValueReference. These references hold the raw value and key or value nodes that contain
+// the original yaml.Node trees that make up the object.
+//
+// Navigating maps that use a KeyReference as a key is tricky, because there is no easy way to provide a lookup.
+// Convenience methods for lookup up properties in a low-level model have therefore been provided.
+package low
diff --git a/datamodel/low/model_builder.go b/datamodel/low/model_builder.go
index 1c684d2..f0d3da0 100644
--- a/datamodel/low/model_builder.go
+++ b/datamodel/low/model_builder.go
@@ -12,6 +12,11 @@ import (
 	"sync"
 )
 
+// BuildModel accepts a yaml.Node pointer and a model, which can be any struct. Using reflection, the model is
+// analyzed and the names of all the properties are extracted from the model and subsequently looked up from within
+// the yaml.Node.Content value.
+//
+// BuildModel is non-recursive and will only build out a single layer of the node tree.
 func BuildModel(node *yaml.Node, model interface{}) error {
 	if node == nil {
 		return nil
@@ -35,6 +40,7 @@ func BuildModel(node *yaml.Node, model interface{}) error {
 		}
 
 		// we need to find a matching field in the YAML, the cases may be off, so take no chances.
+		// TODO: investigate if a straight up to_lower will speed things up here, will it decrease or increase accuracy?
 		cases := []utils.Case{utils.CamelCase, utils.PascalCase, utils.ScreamingSnakeCase,
 			utils.SnakeCase, utils.KebabCase, utils.RegularCase}
 
@@ -68,6 +74,9 @@ func BuildModel(node *yaml.Node, model interface{}) error {
 	return nil
 }
 
+// SetField accepts a field reflection value, a yaml.Node valueNode and a yaml.Node keyNode. Using reflection, the
+// function will attempt to set the value of the field based on the key and value nodes. This method is only useful
+// for low-level models, it has no value to high-level ones.
 func SetField(field reflect.Value, valueNode *yaml.Node, keyNode *yaml.Node) error {
 	switch field.Type() {
 
@@ -198,7 +207,7 @@ func SetField(field reflect.Value, valueNode *yaml.Node, keyNode *yaml.Node) err
 		break
 	case reflect.TypeOf(NodeReference[int64]{}):
 		if valueNode != nil {
-			if utils.IsNodeIntValue(valueNode) || utils.IsNodeFloatValue(valueNode) { //
+			if utils.IsNodeIntValue(valueNode) || utils.IsNodeFloatValue(valueNode) {
 				if field.CanSet() {
 					fv, _ := strconv.ParseInt(valueNode.Value, 10, 64)
 					nr := NodeReference[int64]{
@@ -422,6 +431,7 @@ func SetField(field reflect.Value, valueNode *yaml.Node, keyNode *yaml.Node) err
 	return nil
 }
 
+// BuildModelAsync is a convenience function for calling BuildModel from a goroutine, requires a sync.WaitGroup
 func BuildModelAsync(n *yaml.Node, model interface{}, lwg *sync.WaitGroup, errors *[]error) {
 	if n != nil {
 		err := BuildModel(n, model)
diff --git a/datamodel/low/reference.go b/datamodel/low/reference.go
index cd40588..54277dc 100644
--- a/datamodel/low/reference.go
+++ b/datamodel/low/reference.go
@@ -7,67 +7,99 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-type HasNode interface {
-	GetNode() *yaml.Node
-}
-
+// Buildable is an interface for any struct that can be 'built out'. This means that a struct can accept
+// a root node and a reference to the index that carries data about any references used.
+//
+// Used by generic functions when automatically building out structs based on yaml.Node inputs.
 type Buildable[T any] interface {
 	Build(node *yaml.Node, idx *index.SpecIndex) error
 	*T
 }
 
+// NodeReference is a low-level container for holding a Value of type T, as well as references to
+// a key yaml.Node that points to the key node that contains the value node, and the value node that contains
+// the actual value.
 type NodeReference[T any] struct {
-	Value     T
-	ValueNode *yaml.Node
-	KeyNode   *yaml.Node
-}
 
-type KeyReference[T any] struct {
-	Value   T
+	// The value being referenced
+	Value T
+
+	// The yaml.Node that holds the value
+	ValueNode *yaml.Node
+
+	// The yaml.Node that is the key, that contains the value.
 	KeyNode *yaml.Node
 }
 
+// KeyReference is a low-level container for key nodes holding a Value of type T. A KeyNode is a pointer to the
+// yaml.Node that holds a key to a value.
+type KeyReference[T any] struct {
+
+	// The value being referenced.
+	Value T
+
+	// The yaml.Node that holds this referenced key
+	KeyNode *yaml.Node
+}
+
+// ValueReference is a low-level container for value nodes that hold a Value of type T. A ValueNode is a pointer
+// to the yaml.Node that holds the value.
 type ValueReference[T any] struct {
-	Value     T
+
+	// The value being referenced.
+	Value T
+
+	// The yaml.Node that holds the referenced value
 	ValueNode *yaml.Node
 }
 
+// IsEmpty will return true if this reference has no key or value nodes assigned (it's been ignored)
 func (n NodeReference[T]) IsEmpty() bool {
 	return n.KeyNode == nil && n.ValueNode == nil
 }
 
+// GenerateMapKey will return a string based on the line and column number of the node, e.g. 33:56 for line 33, col 56.
 func (n NodeReference[T]) GenerateMapKey() string {
 	return fmt.Sprintf("%d:%d", n.ValueNode.Line, n.ValueNode.Column)
 }
 
+// Mutate will set the reference value to what is supplied. This happens to both the Value and ValueNode, which means
+// the root document is permanently mutated and changes will be reflected in any serialization of the root document.
 func (n NodeReference[T]) Mutate(value T) NodeReference[T] {
 	n.ValueNode.Value = fmt.Sprintf("%v", value)
 	n.Value = value
 	return n
 }
 
+// IsEmpty will return true if this reference has no key or value nodes assigned (it's been ignored)
 func (n ValueReference[T]) IsEmpty() bool {
 	return n.ValueNode == nil
 }
 
+// GenerateMapKey will return a string based on the line and column number of the node, e.g. 33:56 for line 33, col 56.
 func (n ValueReference[T]) GenerateMapKey() string {
 	return fmt.Sprintf("%d:%d", n.ValueNode.Line, n.ValueNode.Column)
 }
 
+// IsEmpty will return true if this reference has no key or value nodes assigned (it's been ignored)
 func (n KeyReference[T]) IsEmpty() bool {
 	return n.KeyNode == nil
 }
 
+// GenerateMapKey will return a string based on the line and column number of the node, e.g. 33:56 for line 33, col 56.
 func (n KeyReference[T]) GenerateMapKey() string {
 	return fmt.Sprintf("%d:%d", n.KeyNode.Line, n.KeyNode.Column)
 }
 
+// Mutate will set the reference value to what is supplied. This happens to both the Value and ValueNode, which means
+// the root document is permanently mutated and changes will be reflected in any serialization of the root document.
 func (n ValueReference[T]) Mutate(value T) ValueReference[T] {
 	n.ValueNode.Value = fmt.Sprintf("%v", value)
 	n.Value = value
 	return n
 }
 
+// IsCircular will determine if the node in question, is part of a circular reference chain discovered by the index.
 func IsCircular(node *yaml.Node, idx *index.SpecIndex) bool {
 	if idx == nil {
 		return false // no index! nothing we can do.
@@ -94,6 +126,8 @@ func IsCircular(node *yaml.Node, idx *index.SpecIndex) bool {
 	return false
 }
 
+// GetCircularReferenceResult will check if a node is part of a circular reference chain and then return that
+// index.CircularReferenceResult it was located in. Returns nil if not found.
 func GetCircularReferenceResult(node *yaml.Node, idx *index.SpecIndex) *index.CircularReferenceResult {
 	if idx == nil {
 		return nil // no index! nothing we can do.
@@ -118,6 +152,5 @@ func GetCircularReferenceResult(node *yaml.Node, idx *index.SpecIndex) *index.Ci
 			}
 		}
 	}
-
 	return nil
 }
diff --git a/datamodel/low/v2/response.go b/datamodel/low/v2/response.go
index bac1042..ad42df5 100644
--- a/datamodel/low/v2/response.go
+++ b/datamodel/low/v2/response.go
@@ -48,7 +48,7 @@ func (r *Response) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	r.Examples = examples
 
 	//extract headers
-	headers, lN, kN, err := low.ExtractMapFlat[*Header](HeadersLabel, root, idx)
+	headers, lN, kN, err := low.ExtractMap[*Header](HeadersLabel, root, idx)
 	if err != nil {
 		return err
 	}
diff --git a/datamodel/low/v2/responses.go b/datamodel/low/v2/responses.go
index d0c1c10..de99f86 100644
--- a/datamodel/low/v2/responses.go
+++ b/datamodel/low/v2/responses.go
@@ -21,7 +21,7 @@ func (r *Responses) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	r.Extensions = low.ExtractExtensions(root)
 
 	if utils.IsNodeMap(root) {
-		codes, err := low.ExtractMapFlatNoLookup[*Response](root, idx)
+		codes, err := low.ExtractMapNoLookup[*Response](root, idx)
 		if err != nil {
 			return err
 		}
diff --git a/datamodel/low/v3/create_document.go b/datamodel/low/v3/create_document.go
index 5fffe26..d90d614 100644
--- a/datamodel/low/v3/create_document.go
+++ b/datamodel/low/v3/create_document.go
@@ -177,7 +177,7 @@ func extractPaths(info *datamodel.SpecInfo, doc *Document, idx *index.SpecIndex)
 }
 
 func extractWebhooks(info *datamodel.SpecInfo, doc *Document, idx *index.SpecIndex) error {
-	hooks, hooksL, hooksN, eErr := low.ExtractMapFlat[*PathItem](WebhooksLabel, info.RootNode, idx)
+	hooks, hooksL, hooksN, eErr := low.ExtractMap[*PathItem](WebhooksLabel, info.RootNode, idx)
 	if eErr != nil {
 		return eErr
 	}
diff --git a/datamodel/low/v3/encoding.go b/datamodel/low/v3/encoding.go
index 96fbcc6..c163df1 100644
--- a/datamodel/low/v3/encoding.go
+++ b/datamodel/low/v3/encoding.go
@@ -27,7 +27,7 @@ func (en *Encoding) FindHeader(hType string) *low.ValueReference[*Header] {
 
 func (en *Encoding) Build(root *yaml.Node, idx *index.SpecIndex) error {
 
-	headers, hL, hN, err := low.ExtractMapFlat[*Header](HeadersLabel, root, idx)
+	headers, hL, hN, err := low.ExtractMap[*Header](HeadersLabel, root, idx)
 	if err != nil {
 		return err
 	}
diff --git a/datamodel/low/v3/header.go b/datamodel/low/v3/header.go
index aa872c4..3eee088 100644
--- a/datamodel/low/v3/header.go
+++ b/datamodel/low/v3/header.go
@@ -52,7 +52,7 @@ func (h *Header) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle examples if set.
-	exps, expsL, expsN, eErr := low.ExtractMapFlat[*base.Example](base.ExamplesLabel, root, idx)
+	exps, expsL, expsN, eErr := low.ExtractMap[*base.Example](base.ExamplesLabel, root, idx)
 	if eErr != nil {
 		return eErr
 	}
@@ -74,7 +74,7 @@ func (h *Header) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle content, if set.
-	con, cL, cN, cErr := low.ExtractMapFlat[*MediaType](ContentLabel, root, idx)
+	con, cL, cN, cErr := low.ExtractMap[*MediaType](ContentLabel, root, idx)
 	if cErr != nil {
 		return cErr
 	}
diff --git a/datamodel/low/v3/media_type.go b/datamodel/low/v3/media_type.go
index b6e1b8f..5fc52a1 100644
--- a/datamodel/low/v3/media_type.go
+++ b/datamodel/low/v3/media_type.go
@@ -54,7 +54,7 @@ func (mt *MediaType) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle examples if set.
-	exps, expsL, expsN, eErr := low.ExtractMapFlat[*base.Example](base.ExamplesLabel, root, idx)
+	exps, expsL, expsN, eErr := low.ExtractMap[*base.Example](base.ExamplesLabel, root, idx)
 	if eErr != nil {
 		return eErr
 	}
@@ -67,7 +67,7 @@ func (mt *MediaType) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle encoding
-	encs, encsL, encsN, encErr := low.ExtractMapFlat[*Encoding](EncodingLabel, root, idx)
+	encs, encsL, encsN, encErr := low.ExtractMap[*Encoding](EncodingLabel, root, idx)
 	if encErr != nil {
 		return encErr
 	}
diff --git a/datamodel/low/v3/operation.go b/datamodel/low/v3/operation.go
index bb06258..7930a12 100644
--- a/datamodel/low/v3/operation.go
+++ b/datamodel/low/v3/operation.go
@@ -76,7 +76,7 @@ func (o *Operation) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	o.Responses = respBody
 
 	// extract callbacks
-	callbacks, cbL, cbN, cbErr := low.ExtractMapFlat[*Callback](CallbacksLabel, root, idx)
+	callbacks, cbL, cbN, cbErr := low.ExtractMap[*Callback](CallbacksLabel, root, idx)
 	if cbErr != nil {
 		return cbErr
 	}
diff --git a/datamodel/low/v3/parameter.go b/datamodel/low/v3/parameter.go
index d3cb3db..cb43bff 100644
--- a/datamodel/low/v3/parameter.go
+++ b/datamodel/low/v3/parameter.go
@@ -63,7 +63,7 @@ func (p *Parameter) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle examples if set.
-	exps, expsL, expsN, eErr := low.ExtractMapFlat[*base.Example](base.ExamplesLabel, root, idx)
+	exps, expsL, expsN, eErr := low.ExtractMap[*base.Example](base.ExamplesLabel, root, idx)
 	if eErr != nil {
 		return eErr
 	}
@@ -76,7 +76,7 @@ func (p *Parameter) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle content, if set.
-	con, cL, cN, cErr := low.ExtractMapFlat[*MediaType](ContentLabel, root, idx)
+	con, cL, cN, cErr := low.ExtractMap[*MediaType](ContentLabel, root, idx)
 	if cErr != nil {
 		return cErr
 	}
diff --git a/datamodel/low/v3/request_body.go b/datamodel/low/v3/request_body.go
index f3ea848..0166b5f 100644
--- a/datamodel/low/v3/request_body.go
+++ b/datamodel/low/v3/request_body.go
@@ -28,7 +28,7 @@ func (rb *RequestBody) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	rb.Extensions = low.ExtractExtensions(root)
 
 	// handle content, if set.
-	con, cL, cN, cErr := low.ExtractMapFlat[*MediaType](ContentLabel, root, idx)
+	con, cL, cN, cErr := low.ExtractMap[*MediaType](ContentLabel, root, idx)
 	if cErr != nil {
 		return cErr
 	}
diff --git a/datamodel/low/v3/response.go b/datamodel/low/v3/response.go
index 32f6726..3cc70b5 100644
--- a/datamodel/low/v3/response.go
+++ b/datamodel/low/v3/response.go
@@ -23,7 +23,7 @@ type Responses struct {
 
 func (r *Responses) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	if utils.IsNodeMap(root) {
-		codes, err := low.ExtractMapFlatNoLookup[*Response](root, idx)
+		codes, err := low.ExtractMapNoLookup[*Response](root, idx)
 		if err != nil {
 			return err
 		}
@@ -76,7 +76,7 @@ func (r *Response) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	r.Extensions = low.ExtractExtensions(root)
 
 	//extract headers
-	headers, lN, kN, err := low.ExtractMapFlat[*Header](HeadersLabel, root, idx)
+	headers, lN, kN, err := low.ExtractMap[*Header](HeadersLabel, root, idx)
 	if err != nil {
 		return err
 	}
@@ -88,7 +88,7 @@ func (r *Response) Build(root *yaml.Node, idx *index.SpecIndex) error {
 		}
 	}
 
-	con, clN, cN, cErr := low.ExtractMapFlat[*MediaType](ContentLabel, root, idx)
+	con, clN, cN, cErr := low.ExtractMap[*MediaType](ContentLabel, root, idx)
 	if cErr != nil {
 		return cErr
 	}
@@ -101,7 +101,7 @@ func (r *Response) Build(root *yaml.Node, idx *index.SpecIndex) error {
 	}
 
 	// handle links if set
-	links, linkLabel, linkValue, lErr := low.ExtractMapFlat[*Link](LinksLabel, root, idx)
+	links, linkLabel, linkValue, lErr := low.ExtractMap[*Link](LinksLabel, root, idx)
 	if lErr != nil {
 		return lErr
 	}