diff --git a/.gitignore b/.gitignore
index c1e0636..4c60981 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.sw[nop]
+*.iml
diff --git a/README.md b/README.md
index fe43659..e822195 100644
--- a/README.md
+++ b/README.md
@@ -190,12 +190,14 @@
 
 **err.Value()**: *interface{}* Returns the value given
 
-**err.Context()**: *gojsonschema.jsonContext* Returns the context. This has a String() method that will print something like this: (root).firstName
+**err.Context()**: *gojsonschema.JsonContext* Returns the context. This has a String() method that will print something like this: (root).firstName
 
 **err.Field()**: *string* Returns the fieldname in the format firstName, or for embedded properties, person.firstName. This returns the same as the String() method on *err.Context()* but removes the (root). prefix.
 
 **err.Description()**: *string* The error description. This is based on the locale you are using. See the beginning of this section for overwriting the locale with a custom implementation.
 
+**err.DescriptionFormat()**: *string* The error description format. This is relevant if you are adding custom validation errors afterwards to the result.
+
 **err.Details()**: *gojsonschema.ErrorDetails* Returns a map[string]interface{} of additional error details specific to the error. For example, GTE errors will have a "min" value, LTE will have a "max" value. See errors.go for a full description of all the error details. Every error always contains a "field" key that holds the value of *err.Field()*
 
 Note in most cases, the err.Details() will be used to generate replacement strings in your locales, and not used directly. These strings follow the text/template format i.e.
@@ -286,7 +288,56 @@
 gojsonschema.FormatCheckers.Add("ValidUserId", ValidUserIdFormatChecker{})
 ````
 
+## Additional custom validation
+After the validation has run and you have the results, you may add additional
+errors using `Result.AddError`. This is useful to maintain the same format within the resultset instead
+of having to add special exceptions for your own errors. Below is an example.
 
+```go
+type AnswerInvalidError struct {
+    gojsonschema.ResultErrorFields
+}
+
+func newAnswerInvalidError(context *gojsonschema.JsonContext, value interface{}, details gojsonschema.ErrorDetails) *AnswerInvalidError {
+    err := AnswerInvalidError{}
+    err.SetContext(context)
+    err.SetType("custom_invalid_error")
+    // it is important to use SetDescriptionFormat() as this is used to call SetDescription() after it has been parsed
+    // using the description of err will be overridden by this.
+    err.SetDescriptionFormat("Answer to the Ultimate Question of Life, the Universe, and Everything is {{.answer}}")
+    err.SetValue(value)
+    err.SetDetails(details)
+
+    return &err
+}
+
+func main() {
+    // ...
+    schema, err := gojsonschema.NewSchema(schemaLoader)
+    result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+
+    if true { // some validation
+        jsonContext := gojsonschema.NewJsonContext("question", nil)
+        errDetail := gojsonschema.ErrorDetails{
+            "answer": 42,
+        }
+        result.AddError(
+            newAnswerInvalidError(
+                gojsonschema.NewJsonContext("answer", jsonContext),
+                52,
+                errDetail,
+            ),
+            errDetail,
+        )
+    }
+
+    return result, err
+
+}
+```
+
+This is especially useful if you want to add validation beyond what the
+json schema drafts can provide such business specific logic.
 
 ## Uses
 
diff --git a/errors.go b/errors.go
index 58cb01f..e583986 100644
--- a/errors.go
+++ b/errors.go
@@ -158,7 +158,7 @@
 )
 
 // newError takes a ResultError type and sets the type, context, description, details, value, and field
-func newError(err ResultError, context *jsonContext, value interface{}, locale locale, details ErrorDetails) {
+func newError(err ResultError, context *JsonContext, value interface{}, locale locale, details ErrorDetails) {
 	var t string
 	var d string
 	switch err.(type) {
@@ -252,13 +252,14 @@
 	err.SetContext(context)
 	err.SetValue(value)
 	err.SetDetails(details)
+	err.SetDescriptionFormat(d)
 	details["field"] = err.Field()
 
 	if _, exists := details["context"]; !exists && context != nil {
 		details["context"] = context.String()
 	}
 
-	err.SetDescription(formatErrorDescription(d, details))
+	err.SetDescription(formatErrorDescription(err.DescriptionFormat(), details))
 }
 
 // formatErrorDescription takes a string in the default text/template
diff --git a/jsonContext.go b/jsonContext.go
index fcc8d9d..f40668a 100644
--- a/jsonContext.go
+++ b/jsonContext.go
@@ -26,20 +26,20 @@
 
 import "bytes"
 
-// jsonContext implements a persistent linked-list of strings
-type jsonContext struct {
+// JsonContext implements a persistent linked-list of strings
+type JsonContext struct {
 	head string
-	tail *jsonContext
+	tail *JsonContext
 }
 
-func newJsonContext(head string, tail *jsonContext) *jsonContext {
-	return &jsonContext{head, tail}
+func NewJsonContext(head string, tail *JsonContext) *JsonContext {
+	return &JsonContext{head, tail}
 }
 
 // String displays the context in reverse.
 // This plays well with the data structure's persistent nature with
 // Cons and a json document's tree structure.
-func (c *jsonContext) String(del ...string) string {
+func (c *JsonContext) String(del ...string) string {
 	byteArr := make([]byte, 0, c.stringLen())
 	buf := bytes.NewBuffer(byteArr)
 	c.writeStringToBuffer(buf, del)
@@ -47,7 +47,7 @@
 	return buf.String()
 }
 
-func (c *jsonContext) stringLen() int {
+func (c *JsonContext) stringLen() int {
 	length := 0
 	if c.tail != nil {
 		length = c.tail.stringLen() + 1 // add 1 for "."
@@ -57,7 +57,7 @@
 	return length
 }
 
-func (c *jsonContext) writeStringToBuffer(buf *bytes.Buffer, del []string) {
+func (c *JsonContext) writeStringToBuffer(buf *bytes.Buffer, del []string) {
 	if c.tail != nil {
 		c.tail.writeStringToBuffer(buf, del)
 
diff --git a/result.go b/result.go
index 6ad56ae..2e1e8d6 100644
--- a/result.go
+++ b/result.go
@@ -40,10 +40,12 @@
 		Field() string
 		SetType(string)
 		Type() string
-		SetContext(*jsonContext)
-		Context() *jsonContext
+		SetContext(*JsonContext)
+		Context() *JsonContext
 		SetDescription(string)
 		Description() string
+		SetDescriptionFormat(string)
+		DescriptionFormat() string
 		SetValue(interface{})
 		Value() interface{}
 		SetDetails(ErrorDetails)
@@ -55,11 +57,12 @@
 	// ResultErrorFields implements the ResultError interface, so custom errors
 	// can be defined by just embedding this type
 	ResultErrorFields struct {
-		errorType   string       // A string with the type of error (i.e. invalid_type)
-		context     *jsonContext // Tree like notation of the part that failed the validation. ex (root).a.b ...
-		description string       // A human readable error message
-		value       interface{}  // Value given by the JSON file that is the source of the error
-		details     ErrorDetails
+		errorType         string       // A string with the type of error (i.e. invalid_type)
+		context           *JsonContext // Tree like notation of the part that failed the validation. ex (root).a.b ...
+		description       string       // A human readable error message
+		descriptionFormat string       // A format for human readable error message
+		value             interface{}  // Value given by the JSON file that is the source of the error
+		details           ErrorDetails
 	}
 
 	Result struct {
@@ -90,11 +93,11 @@
 	return v.errorType
 }
 
-func (v *ResultErrorFields) SetContext(context *jsonContext) {
+func (v *ResultErrorFields) SetContext(context *JsonContext) {
 	v.context = context
 }
 
-func (v *ResultErrorFields) Context() *jsonContext {
+func (v *ResultErrorFields) Context() *JsonContext {
 	return v.context
 }
 
@@ -106,6 +109,14 @@
 	return v.description
 }
 
+func (v *ResultErrorFields) SetDescriptionFormat(descriptionFormat string) {
+	v.descriptionFormat = descriptionFormat
+}
+
+func (v *ResultErrorFields) DescriptionFormat() string {
+	return v.descriptionFormat
+}
+
 func (v *ResultErrorFields) SetValue(value interface{}) {
 	v.value = value
 }
@@ -154,8 +165,19 @@
 func (v *Result) Errors() []ResultError {
 	return v.errors
 }
+// Add a fully filled error to the error set
+// SetDescription() will be called with the result of the parsed err.DescriptionFormat()
+func (v *Result) AddError(err ResultError, details ErrorDetails) {
+	if _, exists := details["context"]; !exists && err.Context() != nil {
+		details["context"] = err.Context().String()
+	}
 
-func (v *Result) addError(err ResultError, context *jsonContext, value interface{}, details ErrorDetails) {
+	err.SetDescription(formatErrorDescription(err.DescriptionFormat(), details))
+
+	v.errors = append(v.errors, err)
+}
+
+func (v *Result) addInternalError(err ResultError, context *JsonContext, value interface{}, details ErrorDetails) {
 	newError(err, context, value, Locale, details)
 	v.errors = append(v.errors, err)
 	v.score -= 2 // results in a net -1 when added to the +1 we get at the end of the validation function
diff --git a/validation.go b/validation.go
index 664da21..54fc7a7 100644
--- a/validation.go
+++ b/validation.go
@@ -64,21 +64,21 @@
 	// begin validation
 
 	result := &Result{}
-	context := newJsonContext(STRING_CONTEXT_ROOT, nil)
+	context := NewJsonContext(STRING_CONTEXT_ROOT, nil)
 	v.rootSchema.validateRecursive(v.rootSchema, root, result, context)
 
 	return result, nil
 
 }
 
-func (v *subSchema) subValidateWithContext(document interface{}, context *jsonContext) *Result {
+func (v *subSchema) subValidateWithContext(document interface{}, context *JsonContext) *Result {
 	result := &Result{}
 	v.validateRecursive(v, document, result, context)
 	return result
 }
 
 // Walker function to validate the json recursively against the subSchema
-func (v *subSchema) validateRecursive(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateRecursive(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *JsonContext) {
 
 	if internalLogEnabled {
 		internalLog("validateRecursive %s", context.String())
@@ -94,7 +94,7 @@
 	// Check for null value
 	if currentNode == nil {
 		if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_NULL) {
-			result.addError(
+			result.addInternalError(
 				new(InvalidTypeError),
 				context,
 				currentNode,
@@ -126,7 +126,7 @@
 					givenType = TYPE_NUMBER
 				}
 
-				result.addError(
+				result.addInternalError(
 					new(InvalidTypeError),
 					context,
 					currentNode,
@@ -155,7 +155,7 @@
 			case reflect.Slice:
 
 				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_ARRAY) {
-					result.addError(
+					result.addInternalError(
 						new(InvalidTypeError),
 						context,
 						currentNode,
@@ -178,7 +178,7 @@
 
 			case reflect.Map:
 				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_OBJECT) {
-					result.addError(
+					result.addInternalError(
 						new(InvalidTypeError),
 						context,
 						currentNode,
@@ -203,7 +203,7 @@
 				for _, pSchema := range currentSubSchema.propertiesChildren {
 					nextNode, ok := castCurrentNode[pSchema.property]
 					if ok {
-						subContext := newJsonContext(pSchema.property, context)
+						subContext := NewJsonContext(pSchema.property, context)
 						v.validateRecursive(pSchema, nextNode, result, subContext)
 					}
 				}
@@ -213,7 +213,7 @@
 			case reflect.Bool:
 
 				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_BOOLEAN) {
-					result.addError(
+					result.addInternalError(
 						new(InvalidTypeError),
 						context,
 						currentNode,
@@ -235,7 +235,7 @@
 			case reflect.String:
 
 				if currentSubSchema.types.IsTyped() && !currentSubSchema.types.Contains(TYPE_STRING) {
-					result.addError(
+					result.addInternalError(
 						new(InvalidTypeError),
 						context,
 						currentNode,
@@ -264,7 +264,7 @@
 }
 
 // Different kinds of validation there, subSchema / common / array / object / string...
-func (v *subSchema) validateSchema(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateSchema(currentSubSchema *subSchema, currentNode interface{}, result *Result, context *JsonContext) {
 
 	if internalLogEnabled {
 		internalLog("validateSchema %s", context.String())
@@ -288,7 +288,7 @@
 		}
 		if !validatedAnyOf {
 
-			result.addError(new(NumberAnyOfError), context, currentNode, ErrorDetails{})
+			result.addInternalError(new(NumberAnyOfError), context, currentNode, ErrorDetails{})
 
 			if bestValidationResult != nil {
 				// add error messages of closest matching subSchema as
@@ -314,7 +314,7 @@
 
 		if nbValidated != 1 {
 
-			result.addError(new(NumberOneOfError), context, currentNode, ErrorDetails{})
+			result.addInternalError(new(NumberOneOfError), context, currentNode, ErrorDetails{})
 
 			if nbValidated == 0 {
 				// add error messages of closest matching subSchema as
@@ -337,14 +337,14 @@
 		}
 
 		if nbValidated != len(currentSubSchema.allOf) {
-			result.addError(new(NumberAllOfError), context, currentNode, ErrorDetails{})
+			result.addInternalError(new(NumberAllOfError), context, currentNode, ErrorDetails{})
 		}
 	}
 
 	if currentSubSchema.not != nil {
 		validationResult := currentSubSchema.not.subValidateWithContext(currentNode, context)
 		if validationResult.Valid() {
-			result.addError(new(NumberNotError), context, currentNode, ErrorDetails{})
+			result.addInternalError(new(NumberNotError), context, currentNode, ErrorDetails{})
 		}
 	}
 
@@ -357,7 +357,7 @@
 					case []string:
 						for _, dependOnKey := range dependency {
 							if _, dependencyResolved := currentNode.(map[string]interface{})[dependOnKey]; !dependencyResolved {
-								result.addError(
+								result.addInternalError(
 									new(MissingDependencyError),
 									context,
 									currentNode,
@@ -380,14 +380,14 @@
 		if currentSubSchema._then != nil && validationResultIf.Valid() {
 			validationResultThen := currentSubSchema._then.subValidateWithContext(currentNode, context)
 			if !validationResultThen.Valid() {
-				result.addError(new(ConditionThenError), context, currentNode, ErrorDetails{})
+				result.addInternalError(new(ConditionThenError), context, currentNode, ErrorDetails{})
 				result.mergeErrors(validationResultThen)
 			}
 		}
 		if currentSubSchema._else != nil && !validationResultIf.Valid() {
 			validationResultElse := currentSubSchema._else.subValidateWithContext(currentNode, context)
 			if !validationResultElse.Valid() {
-				result.addError(new(ConditionElseError), context, currentNode, ErrorDetails{})
+				result.addInternalError(new(ConditionElseError), context, currentNode, ErrorDetails{})
 				result.mergeErrors(validationResultElse)
 			}
 		}
@@ -396,7 +396,7 @@
 	result.incrementScore()
 }
 
-func (v *subSchema) validateCommon(currentSubSchema *subSchema, value interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateCommon(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
 
 	if internalLogEnabled {
 		internalLog("validateCommon %s", context.String())
@@ -407,10 +407,10 @@
 	if len(currentSubSchema.enum) > 0 {
 		has, err := currentSubSchema.ContainsEnum(value)
 		if err != nil {
-			result.addError(new(InternalError), context, value, ErrorDetails{"error": err})
+			result.addInternalError(new(InternalError), context, value, ErrorDetails{"error": err})
 		}
 		if !has {
-			result.addError(
+			result.addInternalError(
 				new(EnumError),
 				context,
 				value,
@@ -424,7 +424,7 @@
 	result.incrementScore()
 }
 
-func (v *subSchema) validateArray(currentSubSchema *subSchema, value []interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateArray(currentSubSchema *subSchema, value []interface{}, result *Result, context *JsonContext) {
 
 	if internalLogEnabled {
 		internalLog("validateArray %s", context.String())
@@ -436,7 +436,7 @@
 	// TODO explain
 	if currentSubSchema.itemsChildrenIsSingleSchema {
 		for i := range value {
-			subContext := newJsonContext(strconv.Itoa(i), context)
+			subContext := NewJsonContext(strconv.Itoa(i), context)
 			validationResult := currentSubSchema.itemsChildren[0].subValidateWithContext(value[i], subContext)
 			result.mergeErrors(validationResult)
 		}
@@ -447,7 +447,7 @@
 
 			// while we have both schemas and values, check them against each other
 			for i := 0; i != nbItems && i != nbValues; i++ {
-				subContext := newJsonContext(strconv.Itoa(i), context)
+				subContext := NewJsonContext(strconv.Itoa(i), context)
 				validationResult := currentSubSchema.itemsChildren[i].subValidateWithContext(value[i], subContext)
 				result.mergeErrors(validationResult)
 			}
@@ -459,12 +459,12 @@
 				switch currentSubSchema.additionalItems.(type) {
 				case bool:
 					if !currentSubSchema.additionalItems.(bool) {
-						result.addError(new(ArrayNoAdditionalItemsError), context, value, ErrorDetails{})
+						result.addInternalError(new(ArrayNoAdditionalItemsError), context, value, ErrorDetails{})
 					}
 				case *subSchema:
 					additionalItemSchema := currentSubSchema.additionalItems.(*subSchema)
 					for i := nbItems; i != nbValues; i++ {
-						subContext := newJsonContext(strconv.Itoa(i), context)
+						subContext := NewJsonContext(strconv.Itoa(i), context)
 						validationResult := additionalItemSchema.subValidateWithContext(value[i], subContext)
 						result.mergeErrors(validationResult)
 					}
@@ -476,7 +476,7 @@
 	// minItems & maxItems
 	if currentSubSchema.minItems != nil {
 		if nbValues < int(*currentSubSchema.minItems) {
-			result.addError(
+			result.addInternalError(
 				new(ArrayMinItemsError),
 				context,
 				value,
@@ -486,7 +486,7 @@
 	}
 	if currentSubSchema.maxItems != nil {
 		if nbValues > int(*currentSubSchema.maxItems) {
-			result.addError(
+			result.addInternalError(
 				new(ArrayMaxItemsError),
 				context,
 				value,
@@ -501,10 +501,10 @@
 		for _, v := range value {
 			vString, err := marshalToJsonString(v)
 			if err != nil {
-				result.addError(new(InternalError), context, value, ErrorDetails{"err": err})
+				result.addInternalError(new(InternalError), context, value, ErrorDetails{"err": err})
 			}
 			if isStringInSlice(stringifiedItems, *vString) {
-				result.addError(
+				result.addInternalError(
 					new(ItemsMustBeUniqueError),
 					context,
 					value,
@@ -518,7 +518,7 @@
 	result.incrementScore()
 }
 
-func (v *subSchema) validateObject(currentSubSchema *subSchema, value map[string]interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateObject(currentSubSchema *subSchema, value map[string]interface{}, result *Result, context *JsonContext) {
 
 	if internalLogEnabled {
 		internalLog("validateObject %s", context.String())
@@ -528,7 +528,7 @@
 	// minProperties & maxProperties:
 	if currentSubSchema.minProperties != nil {
 		if len(value) < int(*currentSubSchema.minProperties) {
-			result.addError(
+			result.addInternalError(
 				new(ArrayMinPropertiesError),
 				context,
 				value,
@@ -538,7 +538,7 @@
 	}
 	if currentSubSchema.maxProperties != nil {
 		if len(value) > int(*currentSubSchema.maxProperties) {
-			result.addError(
+			result.addInternalError(
 				new(ArrayMaxPropertiesError),
 				context,
 				value,
@@ -553,7 +553,7 @@
 		if ok {
 			result.incrementScore()
 		} else {
-			result.addError(
+			result.addInternalError(
 				new(RequiredError),
 				context,
 				value,
@@ -584,7 +584,7 @@
 					if found {
 
 						if pp_has && !pp_match {
-							result.addError(
+							result.addInternalError(
 								new(AdditionalPropertyNotAllowedError),
 								context,
 								value[pk],
@@ -595,7 +595,7 @@
 					} else {
 
 						if !pp_has || !pp_match {
-							result.addError(
+							result.addInternalError(
 								new(AdditionalPropertyNotAllowedError),
 								context,
 								value[pk],
@@ -647,7 +647,7 @@
 
 			if pp_has && !pp_match {
 
-				result.addError(
+				result.addInternalError(
 					new(InvalidPropertyPatternError),
 					context,
 					value[pk],
@@ -664,7 +664,7 @@
 	result.incrementScore()
 }
 
-func (v *subSchema) validatePatternProperty(currentSubSchema *subSchema, key string, value interface{}, result *Result, context *jsonContext) (has bool, matched bool) {
+func (v *subSchema) validatePatternProperty(currentSubSchema *subSchema, key string, value interface{}, result *Result, context *JsonContext) (has bool, matched bool) {
 
 	if internalLogEnabled {
 		internalLog("validatePatternProperty %s", context.String())
@@ -678,7 +678,7 @@
 	for pk, pv := range currentSubSchema.patternProperties {
 		if matches, _ := regexp.MatchString(pk, key); matches {
 			has = true
-			subContext := newJsonContext(key, context)
+			subContext := NewJsonContext(key, context)
 			validationResult := pv.subValidateWithContext(value, subContext)
 			result.mergeErrors(validationResult)
 			if validationResult.Valid() {
@@ -696,7 +696,7 @@
 	return has, true
 }
 
-func (v *subSchema) validateString(currentSubSchema *subSchema, value interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateString(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
 
 	// Ignore JSON numbers
 	if isJsonNumber(value) {
@@ -718,7 +718,7 @@
 	// minLength & maxLength:
 	if currentSubSchema.minLength != nil {
 		if utf8.RuneCount([]byte(stringValue)) < int(*currentSubSchema.minLength) {
-			result.addError(
+			result.addInternalError(
 				new(StringLengthGTEError),
 				context,
 				value,
@@ -728,7 +728,7 @@
 	}
 	if currentSubSchema.maxLength != nil {
 		if utf8.RuneCount([]byte(stringValue)) > int(*currentSubSchema.maxLength) {
-			result.addError(
+			result.addInternalError(
 				new(StringLengthLTEError),
 				context,
 				value,
@@ -740,7 +740,7 @@
 	// pattern:
 	if currentSubSchema.pattern != nil {
 		if !currentSubSchema.pattern.MatchString(stringValue) {
-			result.addError(
+			result.addInternalError(
 				new(DoesNotMatchPatternError),
 				context,
 				value,
@@ -753,7 +753,7 @@
 	// format
 	if currentSubSchema.format != "" {
 		if !FormatCheckers.IsFormat(currentSubSchema.format, stringValue) {
-			result.addError(
+			result.addInternalError(
 				new(DoesNotMatchFormatError),
 				context,
 				value,
@@ -765,7 +765,7 @@
 	result.incrementScore()
 }
 
-func (v *subSchema) validateNumber(currentSubSchema *subSchema, value interface{}, result *Result, context *jsonContext) {
+func (v *subSchema) validateNumber(currentSubSchema *subSchema, value interface{}, result *Result, context *JsonContext) {
 
 	// Ignore non numbers
 	if !isJsonNumber(value) {
@@ -784,7 +784,7 @@
 	if currentSubSchema.multipleOf != nil {
 
 		if q := new(big.Float).Quo(float64Value, currentSubSchema.multipleOf); !q.IsInt() {
-			result.addError(
+			result.addInternalError(
 				new(MultipleOfError),
 				context,
 				resultErrorFormatJsonNumber(number),
@@ -797,7 +797,7 @@
 	if currentSubSchema.maximum != nil {
 		if currentSubSchema.exclusiveMaximum {
 			if float64Value.Cmp(currentSubSchema.maximum) >= 0 {
-				result.addError(
+				result.addInternalError(
 					new(NumberLTError),
 					context,
 					resultErrorFormatJsonNumber(number),
@@ -808,7 +808,7 @@
 			}
 		} else {
 			if float64Value.Cmp(currentSubSchema.maximum) == 1 {
-				result.addError(
+				result.addInternalError(
 					new(NumberLTEError),
 					context,
 					resultErrorFormatJsonNumber(number),
@@ -825,7 +825,7 @@
 		if currentSubSchema.exclusiveMinimum {
 			if float64Value.Cmp(currentSubSchema.minimum) <= 0 {
 				// if float64Value <= *currentSubSchema.minimum {
-				result.addError(
+				result.addInternalError(
 					new(NumberGTError),
 					context,
 					resultErrorFormatJsonNumber(number),
@@ -836,7 +836,7 @@
 			}
 		} else {
 			if float64Value.Cmp(currentSubSchema.minimum) == -1 {
-				result.addError(
+				result.addInternalError(
 					new(NumberGTEError),
 					context,
 					resultErrorFormatJsonNumber(number),
@@ -851,7 +851,7 @@
 	// format
 	if currentSubSchema.format != "" {
 		if !FormatCheckers.IsFormat(currentSubSchema.format, float64Value) {
-			result.addError(
+			result.addInternalError(
 				new(DoesNotMatchFormatError),
 				context,
 				value,