diff --git a/datamodel/high/base/schema_proxy.go b/datamodel/high/base/schema_proxy.go
index 88f7cb5..4c630d5 100644
--- a/datamodel/high/base/schema_proxy.go
+++ b/datamodel/high/base/schema_proxy.go
@@ -120,6 +120,13 @@ func (sp *SchemaProxy) GetReference() string {
 	return sp.schema.GetValue().GetReference()
 }
 
+func (sp *SchemaProxy) GetSchemaKeyNode() *yaml.Node {
+	if sp.schema != nil {
+		return sp.GoLow().GetKeyNode()
+	}
+	return nil
+}
+
 func (sp *SchemaProxy) GetReferenceNode() *yaml.Node {
 	if sp.refStr != "" {
 		return utils.CreateRefNode(sp.refStr)
diff --git a/datamodel/low/base/contact.go b/datamodel/low/base/contact.go
index c895820..5ee0c86 100644
--- a/datamodel/low/base/contact.go
+++ b/datamodel/low/base/contact.go
@@ -17,14 +17,16 @@ import (
 //	v2 - https://swagger.io/specification/v2/#contactObject
 //	v3 - https://spec.openapis.org/oas/v3.1.0#contact-object
 type Contact struct {
-	Name  low.NodeReference[string]
-	URL   low.NodeReference[string]
-	Email low.NodeReference[string]
+	Name    low.NodeReference[string]
+	URL     low.NodeReference[string]
+	Email   low.NodeReference[string]
+	KeyNode *yaml.Node
 	*low.Reference
 }
 
 // Build is not implemented for Contact (there is nothing to build).
-func (c *Contact) Build(_ context.Context, _, _ *yaml.Node, _ *index.SpecIndex) error {
+func (c *Contact) Build(_ context.Context, keyNode, _ *yaml.Node, _ *index.SpecIndex) error {
+	c.KeyNode = keyNode
 	c.Reference = new(low.Reference)
 	// not implemented.
 	return nil
diff --git a/datamodel/low/base/example.go b/datamodel/low/base/example.go
index cf26d53..3a22f87 100644
--- a/datamodel/low/base/example.go
+++ b/datamodel/low/base/example.go
@@ -25,6 +25,7 @@ type Example struct {
 	Value         low.NodeReference[*yaml.Node]
 	ExternalValue low.NodeReference[string]
 	Extensions    *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode       *yaml.Node
 	*low.Reference
 }
 
@@ -55,7 +56,8 @@ func (ex *Example) Hash() [32]byte {
 }
 
 // Build extracts extensions and example value
-func (ex *Example) Build(_ context.Context, _, root *yaml.Node, _ *index.SpecIndex) error {
+func (ex *Example) Build(_ context.Context, keyNode, root *yaml.Node, _ *index.SpecIndex) error {
+	ex.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	ex.Reference = new(low.Reference)
diff --git a/datamodel/low/base/external_doc.go b/datamodel/low/base/external_doc.go
index a746e6c..8dacac6 100644
--- a/datamodel/low/base/external_doc.go
+++ b/datamodel/low/base/external_doc.go
@@ -25,6 +25,7 @@ type ExternalDoc struct {
 	Description low.NodeReference[string]
 	URL         low.NodeReference[string]
 	Extensions  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode     *yaml.Node
 	*low.Reference
 }
 
@@ -34,7 +35,8 @@ func (ex *ExternalDoc) FindExtension(ext string) *low.ValueReference[*yaml.Node]
 }
 
 // Build will extract extensions from the ExternalDoc instance.
-func (ex *ExternalDoc) Build(_ context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (ex *ExternalDoc) Build(_ context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	ex.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	ex.Reference = new(low.Reference)
diff --git a/datamodel/low/base/info.go b/datamodel/low/base/info.go
index fb75b9a..6267cee 100644
--- a/datamodel/low/base/info.go
+++ b/datamodel/low/base/info.go
@@ -32,6 +32,7 @@ type Info struct {
 	License        low.NodeReference[*License]
 	Version        low.NodeReference[string]
 	Extensions     *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode        *yaml.Node
 	*low.Reference
 }
 
@@ -46,7 +47,8 @@ func (i *Info) GetExtensions() *orderedmap.Map[low.KeyReference[string], low.Val
 }
 
 // Build will extract out the Contact and Info objects from the supplied root node.
-func (i *Info) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (i *Info) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	i.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	i.Reference = new(low.Reference)
diff --git a/datamodel/low/base/license.go b/datamodel/low/base/license.go
index aa5903b..4710a64 100644
--- a/datamodel/low/base/license.go
+++ b/datamodel/low/base/license.go
@@ -22,11 +22,13 @@ type License struct {
 	Name       low.NodeReference[string]
 	URL        low.NodeReference[string]
 	Identifier low.NodeReference[string]
+	KeyNode    *yaml.Node
 	*low.Reference
 }
 
 // Build out a license, complain if both a URL and identifier are present as they are mutually exclusive
-func (l *License) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (l *License) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	l.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	l.Reference = new(low.Reference)
diff --git a/datamodel/low/base/schema.go b/datamodel/low/base/schema.go
index 0062832..9fdcd08 100644
--- a/datamodel/low/base/schema.go
+++ b/datamodel/low/base/schema.go
@@ -1188,7 +1188,8 @@ func buildSchema(ctx context.Context, schemas chan schemaProxyBuildResult, label
 				}
 			}
 		} else {
-			errors <- fmt.Errorf("build schema failed: unexpected node type: %s, line %d, col %d", valueNode.Tag, valueNode.Line, valueNode.Column)
+			errors <- fmt.Errorf("build schema failed: unexpected data type: '%s', line %d, col %d",
+				utils.MakeTagReadable(valueNode), valueNode.Line, valueNode.Column)
 		}
 	}
 }
diff --git a/datamodel/low/base/security_requirement.go b/datamodel/low/base/security_requirement.go
index afb0a17..910f694 100644
--- a/datamodel/low/base/security_requirement.go
+++ b/datamodel/low/base/security_requirement.go
@@ -27,11 +27,13 @@ import (
 //   - https://swagger.io/specification/#security-requirement-object
 type SecurityRequirement struct {
 	Requirements low.ValueReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[[]low.ValueReference[string]]]]
+	KeyNode      *yaml.Node
 	*low.Reference
 }
 
 // Build will extract security requirements from the node (the structure is odd, to be honest)
-func (s *SecurityRequirement) Build(_ context.Context, _, root *yaml.Node, _ *index.SpecIndex) error {
+func (s *SecurityRequirement) Build(_ context.Context, keyNode, root *yaml.Node, _ *index.SpecIndex) error {
+	s.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	s.Reference = new(low.Reference)
diff --git a/datamodel/low/base/tag.go b/datamodel/low/base/tag.go
index 0e7bb83..c1d58ed 100644
--- a/datamodel/low/base/tag.go
+++ b/datamodel/low/base/tag.go
@@ -26,6 +26,7 @@ type Tag struct {
 	Description  low.NodeReference[string]
 	ExternalDocs low.NodeReference[*ExternalDoc]
 	Extensions   *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode      *yaml.Node
 	*low.Reference
 }
 
@@ -35,7 +36,8 @@ func (t *Tag) FindExtension(ext string) *low.ValueReference[*yaml.Node] {
 }
 
 // Build will extract extensions and external docs for the Tag.
-func (t *Tag) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (t *Tag) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	t.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	t.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/callback.go b/datamodel/low/v3/callback.go
index 5547e2a..be0d156 100644
--- a/datamodel/low/v3/callback.go
+++ b/datamodel/low/v3/callback.go
@@ -26,6 +26,7 @@ import (
 type Callback struct {
 	Expression *orderedmap.Map[low.KeyReference[string], low.ValueReference[*PathItem]]
 	Extensions *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode    *yaml.Node
 	*low.Reference
 }
 
@@ -40,7 +41,8 @@ func (cb *Callback) FindExpression(exp string) *low.ValueReference[*PathItem] {
 }
 
 // Build will extract extensions, expressions and PathItem objects for Callback
-func (cb *Callback) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (cb *Callback) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	cb.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	cb.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/encoding.go b/datamodel/low/v3/encoding.go
index 68a5466..816a7b2 100644
--- a/datamodel/low/v3/encoding.go
+++ b/datamodel/low/v3/encoding.go
@@ -24,6 +24,7 @@ type Encoding struct {
 	Style         low.NodeReference[string]
 	Explode       low.NodeReference[bool]
 	AllowReserved low.NodeReference[bool]
+	KeyNode       *yaml.Node
 	*low.Reference
 }
 
@@ -50,7 +51,8 @@ func (en *Encoding) Hash() [32]byte {
 }
 
 // Build will extract all Header objects from supplied node.
-func (en *Encoding) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (en *Encoding) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	en.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	en.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/header.go b/datamodel/low/v3/header.go
index 8f1c625..1d076ff 100644
--- a/datamodel/low/v3/header.go
+++ b/datamodel/low/v3/header.go
@@ -32,6 +32,7 @@ type Header struct {
 	Examples        low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*base.Example]]]
 	Content         low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*MediaType]]]
 	Extensions      *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode         *yaml.Node
 	*low.Reference
 }
 
@@ -86,7 +87,8 @@ func (h *Header) Hash() [32]byte {
 }
 
 // Build will extract extensions, examples, schema and content/media types from node.
-func (h *Header) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (h *Header) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	h.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	h.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/link.go b/datamodel/low/v3/link.go
index 2fb9021..b6525b7 100644
--- a/datamodel/low/v3/link.go
+++ b/datamodel/low/v3/link.go
@@ -35,6 +35,7 @@ type Link struct {
 	Description  low.NodeReference[string]
 	Server       low.NodeReference[*Server]
 	Extensions   *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode      *yaml.Node
 	*low.Reference
 }
 
@@ -54,7 +55,8 @@ func (l *Link) FindExtension(ext string) *low.ValueReference[*yaml.Node] {
 }
 
 // Build will extract extensions and servers from the node.
-func (l *Link) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (l *Link) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	l.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	l.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/media_type.go b/datamodel/low/v3/media_type.go
index d28754b..4666dc3 100644
--- a/datamodel/low/v3/media_type.go
+++ b/datamodel/low/v3/media_type.go
@@ -26,6 +26,7 @@ type MediaType struct {
 	Examples   low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*base.Example]]]
 	Encoding   low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*Encoding]]]
 	Extensions *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode    *yaml.Node
 	*low.Reference
 }
 
@@ -55,7 +56,8 @@ func (mt *MediaType) GetAllExamples() *orderedmap.Map[low.KeyReference[string],
 }
 
 // Build will extract examples, extensions, schema and encoding from node.
-func (mt *MediaType) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (mt *MediaType) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	mt.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	mt.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/oauth_flows.go b/datamodel/low/v3/oauth_flows.go
index eb074ac..c2d4604 100644
--- a/datamodel/low/v3/oauth_flows.go
+++ b/datamodel/low/v3/oauth_flows.go
@@ -24,6 +24,7 @@ type OAuthFlows struct {
 	ClientCredentials low.NodeReference[*OAuthFlow]
 	AuthorizationCode low.NodeReference[*OAuthFlow]
 	Extensions        *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode           *yaml.Node
 	*low.Reference
 }
 
@@ -38,7 +39,8 @@ func (o *OAuthFlows) FindExtension(ext string) *low.ValueReference[*yaml.Node] {
 }
 
 // Build will extract extensions and all OAuthFlow types from the supplied node.
-func (o *OAuthFlows) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (o *OAuthFlows) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	o.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	o.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/operation.go b/datamodel/low/v3/operation.go
index 3109ab3..67a6d24 100644
--- a/datamodel/low/v3/operation.go
+++ b/datamodel/low/v3/operation.go
@@ -37,6 +37,7 @@ type Operation struct {
 	Security     low.NodeReference[[]low.ValueReference[*base.SecurityRequirement]]
 	Servers      low.NodeReference[[]low.ValueReference[*Server]]
 	Extensions   *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode      *yaml.Node
 	*low.Reference
 }
 
@@ -59,7 +60,8 @@ func (o *Operation) FindSecurityRequirement(name string) []low.ValueReference[st
 }
 
 // Build will extract external docs, parameters, request body, responses, callbacks, security and servers.
-func (o *Operation) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (o *Operation) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	o.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	o.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/parameter.go b/datamodel/low/v3/parameter.go
index 4037b67..a467066 100644
--- a/datamodel/low/v3/parameter.go
+++ b/datamodel/low/v3/parameter.go
@@ -22,6 +22,7 @@ import (
 // A unique parameter is defined by a combination of a name and location.
 //   - https://spec.openapis.org/oas/v3.1.0#parameter-object
 type Parameter struct {
+	KeyNode         *yaml.Node
 	Name            low.NodeReference[string]
 	In              low.NodeReference[string]
 	Description     low.NodeReference[string]
@@ -60,8 +61,9 @@ func (p *Parameter) GetExtensions() *orderedmap.Map[low.KeyReference[string], lo
 }
 
 // Build will extract examples, extensions and content/media types.
-func (p *Parameter) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (p *Parameter) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
 	root = utils.NodeAlias(root)
+	p.KeyNode = keyNode
 	utils.CheckForMergeNodes(root)
 	p.Reference = new(low.Reference)
 	p.Extensions = low.ExtractExtensions(root)
diff --git a/datamodel/low/v3/path_item.go b/datamodel/low/v3/path_item.go
index 7ce3f07..c83b7f6 100644
--- a/datamodel/low/v3/path_item.go
+++ b/datamodel/low/v3/path_item.go
@@ -39,6 +39,7 @@ type PathItem struct {
 	Servers     low.NodeReference[[]low.ValueReference[*Server]]
 	Parameters  low.NodeReference[[]low.ValueReference[*Parameter]]
 	Extensions  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode     *yaml.Node
 	*low.Reference
 }
 
@@ -103,7 +104,8 @@ func (p *PathItem) GetExtensions() *orderedmap.Map[low.KeyReference[string], low
 
 // Build extracts extensions, parameters, servers and each http method defined.
 // everything is extracted asynchronously for speed.
-func (p *PathItem) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (p *PathItem) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	p.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	p.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/paths.go b/datamodel/low/v3/paths.go
index 1cda87e..a3db35e 100644
--- a/datamodel/low/v3/paths.go
+++ b/datamodel/low/v3/paths.go
@@ -27,6 +27,7 @@ import (
 type Paths struct {
 	PathItems  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*PathItem]]
 	Extensions *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode    *yaml.Node
 	*low.Reference
 }
 
@@ -64,7 +65,8 @@ func (p *Paths) GetExtensions() *orderedmap.Map[low.KeyReference[string], low.Va
 }
 
 // Build will extract extensions and all PathItems. This happens asynchronously for speed.
-func (p *Paths) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (p *Paths) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	p.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	p.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/request_body.go b/datamodel/low/v3/request_body.go
index 5478f01..bb4ba8d 100644
--- a/datamodel/low/v3/request_body.go
+++ b/datamodel/low/v3/request_body.go
@@ -23,6 +23,7 @@ type RequestBody struct {
 	Content     low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*MediaType]]]
 	Required    low.NodeReference[bool]
 	Extensions  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode     *yaml.Node
 	*low.Reference
 }
 
@@ -42,7 +43,8 @@ func (rb *RequestBody) FindContent(cType string) *low.ValueReference[*MediaType]
 }
 
 // Build will extract extensions and MediaType objects from the node.
-func (rb *RequestBody) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (rb *RequestBody) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	rb.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	rb.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/response.go b/datamodel/low/v3/response.go
index da52a4e..b1d4888 100644
--- a/datamodel/low/v3/response.go
+++ b/datamodel/low/v3/response.go
@@ -27,6 +27,7 @@ type Response struct {
 	Content     low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*MediaType]]]
 	Extensions  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
 	Links       low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*Link]]]
+	KeyNode     *yaml.Node
 	*low.Reference
 }
 
@@ -56,7 +57,8 @@ func (r *Response) FindLink(hType string) *low.ValueReference[*Link] {
 }
 
 // Build will extract headers, extensions, content and links from node.
-func (r *Response) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (r *Response) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	r.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	r.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/responses.go b/datamodel/low/v3/responses.go
index 1904e86..f2d2a2f 100644
--- a/datamodel/low/v3/responses.go
+++ b/datamodel/low/v3/responses.go
@@ -38,6 +38,7 @@ type Responses struct {
 	Codes      *orderedmap.Map[low.KeyReference[string], low.ValueReference[*Response]]
 	Default    low.NodeReference[*Response]
 	Extensions *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode    *yaml.Node
 	*low.Reference
 }
 
@@ -47,7 +48,8 @@ func (r *Responses) GetExtensions() *orderedmap.Map[low.KeyReference[string], lo
 }
 
 // Build will extract default response and all Response objects for each code
-func (r *Responses) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (r *Responses) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	r.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	r.Reference = new(low.Reference)
 	r.Extensions = low.ExtractExtensions(root)
diff --git a/datamodel/low/v3/security_scheme.go b/datamodel/low/v3/security_scheme.go
index bf6bf36..48c2bcf 100644
--- a/datamodel/low/v3/security_scheme.go
+++ b/datamodel/low/v3/security_scheme.go
@@ -35,6 +35,7 @@ type SecurityScheme struct {
 	Flows            low.NodeReference[*OAuthFlows]
 	OpenIdConnectUrl low.NodeReference[string]
 	Extensions       *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode          *yaml.Node
 	*low.Reference
 }
 
@@ -49,7 +50,8 @@ func (ss *SecurityScheme) GetExtensions() *orderedmap.Map[low.KeyReference[strin
 }
 
 // Build will extract OAuthFlows and extensions from the node.
-func (ss *SecurityScheme) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
+func (ss *SecurityScheme) Build(ctx context.Context, keyNode, root *yaml.Node, idx *index.SpecIndex) error {
+	ss.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	ss.Reference = new(low.Reference)
diff --git a/datamodel/low/v3/server.go b/datamodel/low/v3/server.go
index 737029b..e21a8db 100644
--- a/datamodel/low/v3/server.go
+++ b/datamodel/low/v3/server.go
@@ -22,6 +22,7 @@ type Server struct {
 	Description low.NodeReference[string]
 	Variables   low.NodeReference[*orderedmap.Map[low.KeyReference[string], low.ValueReference[*ServerVariable]]]
 	Extensions  *orderedmap.Map[low.KeyReference[string], low.ValueReference[*yaml.Node]]
+	KeyNode     *yaml.Node
 	*low.Reference
 }
 
@@ -36,7 +37,8 @@ func (s *Server) FindVariable(serverVar string) *low.ValueReference[*ServerVaria
 }
 
 // Build will extract server variables from the supplied node.
-func (s *Server) Build(_ context.Context, _, root *yaml.Node, _ *index.SpecIndex) error {
+func (s *Server) Build(_ context.Context, keyNode, root *yaml.Node, _ *index.SpecIndex) error {
+	s.KeyNode = keyNode
 	root = utils.NodeAlias(root)
 	utils.CheckForMergeNodes(root)
 	s.Reference = new(low.Reference)
diff --git a/datamodel/spec_info.go b/datamodel/spec_info.go
index 13cd3b8..a4dd60b 100644
--- a/datamodel/spec_info.go
+++ b/datamodel/spec_info.go
@@ -7,11 +7,10 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"strings"
-	"time"
-
 	"github.com/pb33f/libopenapi/utils"
 	"gopkg.in/yaml.v3"
+	"strings"
+	"time"
 )
 
 const (