diff --git a/comid/svn.go b/comid/svn.go
index 6d634a2..692fad1 100644
--- a/comid/svn.go
+++ b/comid/svn.go
@@ -113,34 +113,11 @@ func NewTaggedSVN(val any) (*SVN, error) {
 		return &SVN{&ret}, nil
 	}
 
-	switch t := val.(type) {
-	case string:
-		u, err := strconv.ParseUint(t, 10, 64)
-		if err != nil {
-			return nil, err
-		}
-		ret = TaggedSVN(u)
-	case TaggedSVN:
-		ret = t
-	case *TaggedSVN:
-		ret = *t
-	case uint64:
-		ret = TaggedSVN(t)
-	case uint:
-		ret = TaggedSVN(t)
-	case int:
-		if t < 0 {
-			return nil, fmt.Errorf("SVN cannot be negative: %d", t)
-		}
-		ret = TaggedSVN(t)
-	case int64:
-		if t < 0 {
-			return nil, fmt.Errorf("SVN cannot be negative: %d", t)
-		}
-		ret = TaggedSVN(t)
-	default:
-		return nil, fmt.Errorf("unexpected type for SVN exact-value: %T", t)
+	u, err := convertToSVNUint64(val)
+	if err != nil {
+		return nil, err
 	}
+	ret = TaggedSVN(u)
 
 	return &SVN{&ret}, nil
 }
@@ -175,34 +152,11 @@ func NewTaggedMinSVN(val any) (*SVN, error) {
 		return &SVN{&ret}, nil
 	}
 
-	switch t := val.(type) {
-	case string:
-		u, err := strconv.ParseUint(t, 10, 64)
-		if err != nil {
-			return nil, err
-		}
-		ret = TaggedMinSVN(u)
-	case TaggedMinSVN:
-		ret = t
-	case *TaggedMinSVN:
-		ret = *t
-	case uint64:
-		ret = TaggedMinSVN(t)
-	case uint:
-		ret = TaggedMinSVN(t)
-	case int:
-		if t < 0 {
-			return nil, fmt.Errorf("SVN cannot be negative: %d", t)
-		}
-		ret = TaggedMinSVN(t)
-	case int64:
-		if t < 0 {
-			return nil, fmt.Errorf("SVN cannot be negative: %d", t)
-		}
-		ret = TaggedMinSVN(t)
-	default:
-		return nil, fmt.Errorf("unexpected type for SVN min-value: %T", t)
+	u, err := convertToSVNUint64(val)
+	if err != nil {
+		return nil, err
 	}
+	ret = TaggedMinSVN(u)
 
 	return &SVN{&ret}, nil
 }
@@ -228,6 +182,42 @@ func (o TaggedMinSVN) Valid() error {
 	return nil
 }
 
+// convertToSVNUint64 converts various SVN types to uint64.
+func convertToSVNUint64(val any) (uint64, error) {
+	switch t := val.(type) {
+	case string:
+		u, err := strconv.ParseUint(t, 10, 64)
+		if err != nil {
+			return 0, err
+		}
+		return u, nil
+	case uint64:
+		return t, nil
+	case uint:
+		return uint64(t), nil
+	case int:
+		if t < 0 {
+			return 0, fmt.Errorf("SVN cannot be negative: %d", t)
+		}
+		return uint64(t), nil
+	case int64:
+		if t < 0 {
+			return 0, fmt.Errorf("SVN cannot be negative: %d", t)
+		}
+		return uint64(t), nil
+	case TaggedSVN:
+		return uint64(t), nil
+	case *TaggedSVN:
+		return uint64(*t), nil
+	case TaggedMinSVN:
+		return uint64(t), nil
+	case *TaggedMinSVN:
+		return uint64(*t), nil
+	default:
+		return 0, fmt.Errorf("unexpected type for SVN: %T", t)
+	}
+}
+
 // ISVNFactory defines the signature for the factory functions that may be
 // registred using RegisterSVNType to provide a new implementation of the
 // corresponding type choice. The factory function should create a new *SVN
diff --git a/comid/svn_test.go b/comid/svn_test.go
index 6127e0b..b9d29ad 100644
--- a/comid/svn_test.go
+++ b/comid/svn_test.go
@@ -103,7 +103,7 @@ func Test_NewSVN(t *testing.T) {
 	assert.NoError(t, err)
 
 	_, err = NewSVN(true, "exact-value")
-	assert.EqualError(t, err, "unexpected type for SVN exact-value: bool")
+	assert.EqualError(t, err, "unexpected type for SVN: bool")
 
 	inMin := TaggedMinSVN(7)
 
@@ -114,7 +114,7 @@ func Test_NewSVN(t *testing.T) {
 	assert.NoError(t, err)
 
 	_, err = NewSVN(true, "min-value")
-	assert.EqualError(t, err, "unexpected type for SVN min-value: bool")
+	assert.EqualError(t, err, "unexpected type for SVN: bool")
 
 	_, err = NewSVN(true, "test")
 	assert.EqualError(t, err, "unknown SVN type: test")