diff --git a/graffiti/getter/getter.go b/graffiti/getter/getter.go
new file mode 100644
index 0000000000000000000000000000000000000000..035e124ed5373f5758b31e8ff47be4dc2ce5f628
--- /dev/null
+++ b/graffiti/getter/getter.go
@@ -0,0 +1,27 @@
+package getter
+
+import "errors"
+
+// ErrFieldNotFound error field not found
+var ErrFieldNotFound = errors.New("Field not found")
+
+// BoolPredicate is a function that applies a test against a boolean
+type BoolPredicate func(b bool) bool
+
+// Int64Predicate is a function that applies a test against an integer
+type Int64Predicate func(i int64) bool
+
+// StringPredicate is a function that applies a test against a string
+type StringPredicate func(s string) bool
+
+// Getter describes filter getter fields
+type Getter interface {
+	GetField(field string) (interface{}, error)
+	GetFieldKeys() []string
+	GetFieldBool(field string) (bool, error)
+	GetFieldInt64(field string) (int64, error)
+	GetFieldString(field string) (string, error)
+	MatchBool(field string, predicate BoolPredicate) bool
+	MatchInt64(field string, predicate Int64Predicate) bool
+	MatchString(field string, predicate StringPredicate) bool
+}