diff --git a/all.go b/all.go
index 99579ca..699a072 100644
--- a/all.go
+++ b/all.go
@@ -53,12 +53,12 @@ func (n *node) allByIndex(tx *bolt.Tx, fieldName string, cfg *structConfig, ref
 		return ErrNotFound
 	}
 
-	idxInfo, ok := cfg.Fields[fieldName]
+	fieldCfg, ok := cfg.Fields[fieldName]
 	if !ok {
 		return ErrNotFound
 	}
 
-	idx, err := getIndex(bucket, idxInfo.Type, fieldName)
+	idx, err := getIndex(bucket, fieldCfg.Index, fieldName)
 	if err != nil {
 		return err
 	}
diff --git a/delete_struct.go b/delete_struct.go
index cfec84b..556d4ca 100644
--- a/delete_struct.go
+++ b/delete_struct.go
@@ -36,8 +36,12 @@ func (n *node) deleteStruct(tx *bolt.Tx, cfg *structConfig, id []byte) error {
 		return ErrNotFound
 	}
 
-	for fieldName, idxInfo := range cfg.Fields {
-		idx, err := getIndex(bucket, idxInfo.Type, fieldName)
+	for fieldName, fieldCfg := range cfg.Fields {
+		if fieldCfg.Index == "" {
+			continue
+		}
+
+		idx, err := getIndex(bucket, fieldCfg.Index, fieldName)
 		if err != nil {
 			return err
 		}
diff --git a/extract.go b/extract.go
index b4940d7..718a964 100644
--- a/extract.go
+++ b/extract.go
@@ -14,12 +14,13 @@ const (
 	tagIdx       = "index"
 	tagUniqueIdx = "unique"
 	tagInline    = "inline"
+	tagIncrement = "increment"
 	indexPrefix  = "__storm_index_"
 )
 
 type fieldConfig struct {
 	Name      string
-	Type      string
+	Index     string
 	IsZero    bool
 	IsID      bool
 	Increment bool
@@ -34,18 +35,6 @@ type structConfig struct {
 	ID     *fieldConfig
 }
 
-// helper
-func (m *structConfig) AllByType(indexType string) []*fieldConfig {
-	var idx []*fieldConfig
-	for k := range m.Fields {
-		if m.Fields[k].Type == indexType {
-			idx = append(idx, m.Fields[k])
-		}
-	}
-
-	return idx
-}
-
 func extract(s *reflect.Value, mi ...*structConfig) (*structConfig, error) {
 	if s.Kind() == reflect.Ptr {
 		e := s.Elem()
@@ -130,7 +119,9 @@ func extractField(value *reflect.Value, field *reflect.StructField, m *structCon
 			case "id":
 				f.IsID = true
 			case tagUniqueIdx, tagIdx:
-				f.Type = tag
+				f.Index = tag
+			case tagIncrement:
+				f.Increment = true
 			case tagInline:
 				if value.Kind() == reflect.Ptr {
 					e := value.Elem()
@@ -150,10 +141,8 @@ func extractField(value *reflect.Value, field *reflect.StructField, m *structCon
 			}
 		}
 
-		if f.Type != "" {
-			if _, ok := m.Fields[f.Name]; !ok || !isChild {
-				m.Fields[f.Name] = f
-			}
+		if _, ok := m.Fields[f.Name]; !ok || !isChild {
+			m.Fields[f.Name] = f
 		}
 	}
 
diff --git a/extract_test.go b/extract_test.go
index 0b12909..248a9c5 100644
--- a/extract_test.go
+++ b/extract_test.go
@@ -7,6 +7,17 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func allByType(m *structConfig, indexType string) []*fieldConfig {
+	var idx []*fieldConfig
+	for k := range m.Fields {
+		if m.Fields[k].Index == indexType {
+			idx = append(idx, m.Fields[k])
+		}
+	}
+
+	return idx
+}
+
 func TestExtractNoTags(t *testing.T) {
 	s := ClassicNoTags{}
 	r := reflect.ValueOf(&s)
@@ -33,8 +44,8 @@ func TestExtractUniqueTags(t *testing.T) {
 	assert.NotNil(t, infos.ID)
 	assert.False(t, infos.ID.IsZero)
 	assert.Equal(t, "ClassicUnique", infos.Name)
-	assert.Len(t, infos.AllByType("index"), 0)
-	assert.Len(t, infos.AllByType("unique"), 4)
+	assert.Len(t, allByType(infos, "index"), 0)
+	assert.Len(t, allByType(infos, "unique"), 4)
 }
 
 func TestExtractIndexTags(t *testing.T) {
@@ -46,8 +57,8 @@ func TestExtractIndexTags(t *testing.T) {
 	assert.NotNil(t, infos.ID)
 	assert.False(t, infos.ID.IsZero)
 	assert.Equal(t, "ClassicIndex", infos.Name)
-	assert.Len(t, infos.AllByType("index"), 5)
-	assert.Len(t, infos.AllByType("unique"), 0)
+	assert.Len(t, allByType(infos, "index"), 5)
+	assert.Len(t, allByType(infos, "unique"), 0)
 }
 
 func TestExtractInlineWithIndex(t *testing.T) {
@@ -58,6 +69,6 @@ func TestExtractInlineWithIndex(t *testing.T) {
 	assert.NotNil(t, infos)
 	assert.NotNil(t, infos.ID)
 	assert.Equal(t, "ClassicInline", infos.Name)
-	assert.Len(t, infos.AllByType("index"), 3)
-	assert.Len(t, infos.AllByType("unique"), 2)
+	assert.Len(t, allByType(infos, "index"), 3)
+	assert.Len(t, allByType(infos, "unique"), 2)
 }
diff --git a/init.go b/init.go
index 343162a..6efe006 100644
--- a/init.go
+++ b/init.go
@@ -32,8 +32,11 @@ func (n *node) init(tx *bolt.Tx, cfg *structConfig) error {
 		return err
 	}
 
-	for fieldName, idxInfo := range cfg.Fields {
-		switch idxInfo.Type {
+	for fieldName, fieldCfg := range cfg.Fields {
+		if fieldCfg.Index == "" {
+			continue
+		}
+		switch fieldCfg.Index {
 		case tagUniqueIdx:
 			_, err = index.NewUniqueIndex(bucket, []byte(indexPrefix+fieldName))
 		case tagIdx:
diff --git a/one.go b/one.go
index 7c2ec7e..3a382d5 100644
--- a/one.go
+++ b/one.go
@@ -3,6 +3,7 @@ package storm
 import (
 	"fmt"
 	"reflect"
+	"strings"
 
 	"github.com/asdine/storm/index"
 	"github.com/asdine/storm/q"
@@ -56,8 +57,14 @@ func (n *node) One(fieldName string, value interface{}, to interface{}) error {
 		return err
 	}
 
+	var isID bool
+	if tag != "" {
+		tags := strings.Split(tag, ",")
+		isID = tags[0] == ""
+	}
+
 	return n.readTx(func(tx *bolt.Tx) error {
-		return n.one(tx, bucketName, fieldName, tag, to, val, fieldName == "ID" || tag == "id")
+		return n.one(tx, bucketName, fieldName, tag, to, val, fieldName == "ID" || isID)
 	})
 }
 
diff --git a/save.go b/save.go
index d29dbbe..9759901 100644
--- a/save.go
+++ b/save.go
@@ -81,13 +81,17 @@ func (n *node) save(tx *bolt.Tx, cfg *structConfig, id []byte, raw []byte, data
 		}
 	}
 
-	for fieldName, idxInfo := range cfg.Fields {
-		idx, err := getIndex(bucket, idxInfo.Type, fieldName)
+	for fieldName, fieldCfg := range cfg.Fields {
+		if fieldCfg.Index == "" {
+			continue
+		}
+
+		idx, err := getIndex(bucket, fieldCfg.Index, fieldName)
 		if err != nil {
 			return err
 		}
 
-		if idxInfo.IsZero {
+		if fieldCfg.IsZero {
 			err = idx.RemoveID(id)
 			if err != nil {
 				return err
@@ -95,7 +99,7 @@ func (n *node) save(tx *bolt.Tx, cfg *structConfig, id []byte, raw []byte, data
 			continue
 		}
 
-		value, err := toBytes(idxInfo.Value.Interface(), n.s.codec)
+		value, err := toBytes(fieldCfg.Value.Interface(), n.s.codec)
 		if err != nil {
 			return err
 		}
diff --git a/sink.go b/sink.go
index ef20629..f6cd4fd 100644
--- a/sink.go
+++ b/sink.go
@@ -235,8 +235,11 @@ func (d *deleteSink) add(bucket *bolt.Bucket, k []byte, v []byte, elem reflect.V
 		return false, err
 	}
 
-	for fieldName, idxInfo := range info.Fields {
-		idx, err := getIndex(bucket, idxInfo.Type, fieldName)
+	for fieldName, fieldCfg := range info.Fields {
+		if fieldCfg.Index == "" {
+			continue
+		}
+		idx, err := getIndex(bucket, fieldCfg.Index, fieldName)
 		if err != nil {
 			return false, err
 		}