diff --git a/src/commontypes.jl b/src/commontypes.jl
index 6dc32fb..abaef28 100644
--- a/src/commontypes.jl
+++ b/src/commontypes.jl
@@ -6,11 +6,17 @@ abstract type AnyOfAPIModel <: UnionAPIModel end
 struct OpenAPIException <: Exception
     reason::String
 end
-struct ValidationException <: Exception
+Base.@kwdef struct ValidationException <: Exception
     reason::String
+    value=nothing
+    parameter=nothing
+    rule=nothing
+    args=nothing
+    operation_or_model=nothing
 end
+ValidationException(reason) = ValidationException(;reason)
 struct InvocationException <: Exception
     reason::String
 end
 
-property_type(::Type{T}, name::Symbol) where {T<:APIModel} = error("invalid type $T")
\ No newline at end of file
+property_type(::Type{T}, name::Symbol) where {T<:APIModel} = error("invalid type $T")
diff --git a/src/val.jl b/src/val.jl
index fbe64f6..21f393b 100644
--- a/src/val.jl
+++ b/src/val.jl
@@ -73,14 +73,14 @@ const VAL_API_PARAM = Dict{Symbol,Function}([
     :multipleOf => val_multiple_of,
 ])
 
-function validate_param(param, operation_or_model, rule, value, args...)
+function validate_param(parameter, operation_or_model, rule, value, args...)
     # do not validate missing values
     (value === nothing) && return
 
     VAL_API_PARAM[rule](value, args...) && return
 
-    msg = string("Invalid value ($value) of parameter ", param, " for ", operation_or_model, ", ", MSG_INVALID_API_PARAM[rule](args...))
-    throw(ValidationException(msg))
+    reason = string("Invalid value ($value) of parameter ", parameter, " for ", operation_or_model, ", ", MSG_INVALID_API_PARAM[rule](args...))
+    throw(ValidationException(;reason, operation_or_model, value, parameter, rule, args))
 end
 
 validate_property(::Type{T}, name::Symbol, val) where {T<:APIModel} = nothing