diff --git a/engine/account.go b/engine/account.go
index bb5b6d2a5..5da6c027e 100644
--- a/engine/account.go
+++ b/engine/account.go
@@ -1325,10 +1325,21 @@ func (acc *Account) FieldAsInterface(fldPath []string) (val interface{}, err err
 		}
 		return acc.ID, nil
 	case utils.BalanceMap:
-		if len(fldPath) != 1 {
+		if len(fldPath) == 1 {
 			return acc.BalanceMap, nil
 		}
-		if bc, has := acc.BalanceMap[fldPath[1]]; has {
+		opath, indx := utils.GetPathIndex(fldPath[1])
+		if bc, has := acc.BalanceMap[opath]; has {
+			if indx != nil {
+				if len(bc) <= *indx {
+					return nil, utils.ErrNotFound
+				}
+				c := bc[*indx]
+				if len(fldPath) == 2 {
+					return c, nil
+				}
+				return c.FieldAsInterface(fldPath[2:])
+			}
 			if len(fldPath) == 2 {
 				return bc, nil
 			}
@@ -1336,18 +1347,29 @@ func (acc *Account) FieldAsInterface(fldPath []string) (val interface{}, err err
 		}
 		return nil, utils.ErrNotFound
 	case utils.UnitCounters:
-		if len(fldPath) != 1 {
+		if len(fldPath) == 1 {
 			return acc.UnitCounters, nil
 		}
 		if uc, has := acc.UnitCounters[fldPath[1]]; has {
 			if len(fldPath) == 2 {
 				return uc, nil
 			}
-			return uc.FieldAsInterface(fldPath[2:])
+			var indx int
+			if indx, err = strconv.Atoi(fldPath[2]); err != nil {
+				return
+			}
+			if len(uc) <= indx {
+				return nil, utils.ErrNotFound
+			}
+			c := uc[indx]
+			if len(fldPath) == 1 {
+				return c, nil
+			}
+			return c.FieldAsInterface(fldPath[3:])
 		}
 		return nil, utils.ErrNotFound
 	case utils.ActionTriggers:
-		if len(fldPath) != 1 {
+		if len(fldPath) == 1 {
 			return acc.ActionTriggers, nil
 		}
 		for _, at := range acc.ActionTriggers {
diff --git a/engine/balance_filter.go b/engine/balance_filter.go
index d554922e6..80b9109e4 100644
--- a/engine/balance_filter.go
+++ b/engine/balance_filter.go
@@ -19,8 +19,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 package engine
 
 import (
+	"fmt"
 	"math"
 	"reflect"
+	"strconv"
 	"time"
 
 	"github.com/cgrates/cgrates/utils"
@@ -417,3 +419,211 @@ func (bf *BalanceFilter) ModifyBalance(b *Balance) {
 	}
 	b.SetDirty() // Mark the balance as dirty since we have modified and it should be checked by action triggers
 }
+
+func (bp *BalanceFilter) String() string {
+	return utils.ToJSON(bp)
+}
+
+func (bp *BalanceFilter) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if bp == nil || len(fldPath) == 0 {
+		return nil, utils.ErrNotFound
+	}
+	switch fldPath[0] {
+	default:
+		opath, indx := utils.GetPathIndexString(fldPath[0])
+		if indx != nil {
+			switch opath {
+			case utils.DestinationIDs:
+				if bp.DestinationIDs == nil {
+					return nil, utils.ErrNotFound
+				}
+				val, has := (*bp.DestinationIDs)[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.Categories:
+				if bp.Categories == nil {
+					return nil, utils.ErrNotFound
+				}
+				val, has := (*bp.Categories)[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.SharedGroups:
+				if bp.SharedGroups == nil {
+					return nil, utils.ErrNotFound
+				}
+				val, has := (*bp.SharedGroups)[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.TimingIDs:
+				if bp.TimingIDs == nil {
+					return nil, utils.ErrNotFound
+				}
+				val, has := (*bp.TimingIDs)[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.Timings:
+				var idx int
+				if idx, err = strconv.Atoi(*indx); err != nil {
+					return
+				}
+				if len(bp.Timings) <= idx {
+					return nil, utils.ErrNotFound
+				}
+				tm := bp.Timings[idx]
+				if len(fldPath) == 1 {
+					return tm, nil
+				}
+				return tm.FieldAsInterface(fldPath[1:])
+			case utils.Factor:
+				if bp.Factor == nil {
+					return nil, utils.ErrNotFound
+				}
+				val, has := (*bp.Factor)[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			}
+		}
+		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+	case utils.Uuid:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.Uuid == nil {
+			return
+		}
+		return *bp.Uuid, nil
+	case utils.ID:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.ID == nil {
+			return
+		}
+		return *bp.ID, nil
+	case utils.Type:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.Type == nil {
+			return
+		}
+		return *bp.Type, nil
+	case utils.ExpirationDate:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.ExpirationDate == nil {
+			return
+		}
+		return *bp.ExpirationDate, nil
+	case utils.Weight:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.Weight == nil {
+			return
+		}
+		return *bp.Weight, nil
+	case utils.RatingSubject:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.RatingSubject == nil {
+			return
+		}
+		return *bp.RatingSubject, nil
+	case utils.Disabled:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.Disabled == nil {
+			return
+		}
+		return *bp.Disabled, nil
+	case utils.Blocker:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		if bp.Blocker == nil {
+			return
+		}
+		return *bp.Blocker, nil
+	case utils.DestinationIDs:
+		if len(fldPath) == 1 {
+			return bp.DestinationIDs, nil
+		}
+		if bp.DestinationIDs == nil {
+			return nil, utils.ErrNotFound
+		}
+		return bp.DestinationIDs.FieldAsInterface(fldPath[1:])
+	case utils.Categories:
+		if len(fldPath) == 1 {
+			return bp.Categories, nil
+		}
+		if bp.Categories == nil {
+			return nil, utils.ErrNotFound
+		}
+		return bp.Categories.FieldAsInterface(fldPath[1:])
+	case utils.SharedGroups:
+		if len(fldPath) == 1 {
+			return bp.SharedGroups, nil
+		}
+		if bp.SharedGroups == nil {
+			return nil, utils.ErrNotFound
+		}
+		return bp.SharedGroups.FieldAsInterface(fldPath[1:])
+	case utils.Timings:
+		if len(fldPath) == 1 {
+			return bp.Timings, nil
+		}
+		for _, tm := range bp.Timings {
+			if tm.ID == fldPath[1] {
+				if len(fldPath) == 2 {
+					return tm, nil
+				}
+				return tm.FieldAsInterface(fldPath[2:])
+			}
+		}
+		return nil, utils.ErrNotFound
+	case utils.TimingIDs:
+		if len(fldPath) == 1 {
+			return bp.TimingIDs, nil
+		}
+		if bp.TimingIDs == nil {
+			return nil, utils.ErrNotFound
+		}
+		return bp.TimingIDs.FieldAsInterface(fldPath[1:])
+	case utils.Factor:
+		if len(fldPath) == 1 {
+			return bp.Factor, nil
+		}
+		if bp.Factor == nil {
+			return nil, utils.ErrNotFound
+		}
+		return bp.Factor.FieldAsInterface(fldPath[1:])
+	case utils.Value:
+		if len(fldPath) == 1 {
+			return bp.Value, nil
+		}
+		return bp.Value.FieldAsInterface(fldPath[1:])
+	}
+}
+
+func (bp *BalanceFilter) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = bp.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
diff --git a/engine/balances.go b/engine/balances.go
index 7d9d1cd95..fb0d1fa93 100644
--- a/engine/balances.go
+++ b/engine/balances.go
@@ -22,6 +22,7 @@ import (
 	"errors"
 	"fmt"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 
@@ -1097,3 +1098,215 @@ func (b *Balance) debit(cd *CallDescriptor, ub *Account, moneyBalances Balances,
 	}
 	return
 }
+
+func (bc Balances) String() string {
+	return utils.ToJSON(bc)
+}
+
+func (bc Balances) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if bc == nil || len(fldPath) == 0 {
+		return nil, utils.ErrNotFound
+	}
+	for _, at := range bc {
+		if at.ID == fldPath[0] {
+			if len(fldPath) == 1 {
+				return at, nil
+			}
+			return at.FieldAsInterface(fldPath[1:])
+		}
+	}
+	var indx int
+	if indx, err = strconv.Atoi(fldPath[0]); err != nil {
+		return
+	}
+	if len(bc) <= indx {
+		return nil, utils.ErrNotFound
+	}
+	c := bc[indx]
+	if len(fldPath) == 1 {
+		return c, nil
+	}
+	return c.FieldAsInterface(fldPath[1:])
+}
+
+func (bc Balances) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = bc.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
+
+func (b *Balance) String() string {
+	return utils.ToJSON(b)
+}
+
+func (b *Balance) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if b == nil || len(fldPath) == 0 {
+		return nil, utils.ErrNotFound
+	}
+	switch fldPath[0] {
+	default:
+		opath, indx := utils.GetPathIndexString(fldPath[0])
+		if indx != nil {
+			switch opath {
+			case utils.DestinationIDs:
+				val, has := b.DestinationIDs[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.Categories:
+				val, has := b.Categories[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.SharedGroups:
+				val, has := b.SharedGroups[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.TimingIDs:
+				val, has := b.TimingIDs[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			case utils.Timings:
+				var idx int
+				if idx, err = strconv.Atoi(*indx); err != nil {
+					return
+				}
+				if len(b.Timings) <= idx {
+					return nil, utils.ErrNotFound
+				}
+				tm := b.Timings[idx]
+				if len(fldPath) == 1 {
+					return tm, nil
+				}
+				return tm.FieldAsInterface(fldPath[1:])
+			case utils.Factor:
+				val, has := b.Factor[*indx]
+				if !has || len(fldPath) != 1 {
+					return nil, utils.ErrNotFound
+				}
+				return val, nil
+			}
+		}
+		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+	case utils.Uuid:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.Uuid, nil
+	case utils.ID:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.ID, nil
+	case utils.Value:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.Value, nil
+	case utils.ExpirationDate:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.ExpirationDate, nil
+	case utils.Weight:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.Weight, nil
+	case utils.DestinationIDs:
+		if len(fldPath) == 1 {
+			return b.DestinationIDs, nil
+		}
+		return b.DestinationIDs.FieldAsInterface(fldPath[1:])
+	case utils.RatingSubject:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.RatingSubject, nil
+	case utils.Categories:
+		if len(fldPath) == 1 {
+			return b.Categories, nil
+		}
+		return b.Categories.FieldAsInterface(fldPath[1:])
+	case utils.SharedGroups:
+		if len(fldPath) == 1 {
+			return b.SharedGroups, nil
+		}
+		return b.SharedGroups.FieldAsInterface(fldPath[1:])
+	case utils.Timings:
+		if len(fldPath) == 1 {
+			return b.Timings, nil
+		}
+		for _, tm := range b.Timings {
+			if tm.ID == fldPath[1] {
+				if len(fldPath) == 2 {
+					return tm, nil
+				}
+				return tm.FieldAsInterface(fldPath[2:])
+			}
+		}
+		return nil, utils.ErrNotFound
+	case utils.TimingIDs:
+		if len(fldPath) == 1 {
+			return b.TimingIDs, nil
+		}
+		return b.TimingIDs.FieldAsInterface(fldPath[1:])
+	case utils.Disabled:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.Disabled, nil
+	case utils.Factor:
+		if len(fldPath) == 1 {
+			return b.Factor, nil
+		}
+		return b.Factor.FieldAsInterface(fldPath[1:])
+	case utils.Blocker:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return b.Blocker, nil
+	}
+}
+
+func (b *Balance) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = b.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
+
+func (f ValueFactor) String() string {
+	return utils.ToJSON(f)
+}
+
+func (f ValueFactor) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if f == nil || len(fldPath) != 1 {
+		return nil, utils.ErrNotFound
+	}
+	c, has := f[fldPath[0]]
+	if !has {
+		return nil, utils.ErrNotFound
+	}
+	return c, nil
+}
+
+func (f ValueFactor) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = f.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
diff --git a/engine/rateinterval.go b/engine/rateinterval.go
index 1c5b35871..5c30a5a2e 100644
--- a/engine/rateinterval.go
+++ b/engine/rateinterval.go
@@ -40,14 +40,15 @@ type RateInterval struct {
 
 // Separate structure used for rating plan size optimization
 type RITiming struct {
-	ID                 string
-	Years              utils.Years
-	Months             utils.Months
-	MonthDays          utils.MonthDays
-	WeekDays           utils.WeekDays
-	StartTime, EndTime string // ##:##:## format
-	cronString         string
-	tag                string // loading validation only
+	ID         string
+	Years      utils.Years
+	Months     utils.Months
+	MonthDays  utils.MonthDays
+	WeekDays   utils.WeekDays
+	StartTime  string // ##:##:## format
+	EndTime    string // ##:##:## format
+	cronString string
+	tag        string // loading validation only
 }
 
 func (rit *RITiming) CronString() string {
@@ -527,3 +528,130 @@ func (r *RGRate) Clone() (cln *RGRate) {
 	}
 	return
 }
+
+func (rit *RITiming) String() string {
+	return utils.ToJSON(rit)
+}
+
+func (rit *RITiming) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if rit == nil || len(fldPath) == 0 {
+		return nil, utils.ErrNotFound
+	}
+	switch fldPath[0] {
+	default:
+		opath, indx := utils.GetPathIndex(fldPath[0])
+		if indx != nil {
+			switch opath {
+			case utils.YearsFieldName:
+				if len(fldPath) != 1 || len(rit.Years) <= *indx {
+					return nil, utils.ErrNotFound
+				}
+				return rit.Years[*indx], nil
+			case utils.MonthsFieldName:
+				if len(fldPath) != 1 || len(rit.Months) <= *indx {
+					return nil, utils.ErrNotFound
+				}
+				return rit.Months[*indx], nil
+			case utils.MonthDaysFieldName:
+				if len(fldPath) != 1 || len(rit.MonthDays) <= *indx {
+					return nil, utils.ErrNotFound
+				}
+				return rit.MonthDays[*indx], nil
+			case utils.WeekDaysFieldName:
+				if len(fldPath) != 1 || len(rit.WeekDays) <= *indx {
+					return nil, utils.ErrNotFound
+				}
+				return rit.WeekDays[*indx], nil
+			}
+		}
+		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+	case utils.ID:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return rit.ID, nil
+	case utils.StartTime:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return rit.StartTime, nil
+	case utils.EndTime:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return rit.EndTime, nil
+	case utils.YearsFieldName:
+		switch len(fldPath) {
+		case 1:
+			return rit.Years, nil
+		case 2:
+			var idx int
+			if idx, err = strconv.Atoi(fldPath[1]); err != nil {
+				return
+			}
+			if len(rit.Years) <= idx {
+				return nil, utils.ErrNotFound
+			}
+			return rit.Years[idx], nil
+		default:
+			return nil, utils.ErrNotFound
+		}
+	case utils.MonthsFieldName:
+		switch len(fldPath) {
+		case 1:
+			return rit.Months, nil
+		case 2:
+			var idx int
+			if idx, err = strconv.Atoi(fldPath[1]); err != nil {
+				return
+			}
+			if len(rit.Months) <= idx {
+				return nil, utils.ErrNotFound
+			}
+			return rit.Months[idx], nil
+		default:
+			return nil, utils.ErrNotFound
+		}
+	case utils.MonthDaysFieldName:
+		switch len(fldPath) {
+		case 1:
+			return rit.MonthDays, nil
+		case 2:
+			var idx int
+			if idx, err = strconv.Atoi(fldPath[1]); err != nil {
+				return
+			}
+			if len(rit.MonthDays) <= idx {
+				return nil, utils.ErrNotFound
+			}
+			return rit.MonthDays[idx], nil
+		default:
+			return nil, utils.ErrNotFound
+		}
+	case utils.WeekDaysFieldName:
+		switch len(fldPath) {
+		case 1:
+			return rit.WeekDays, nil
+		case 2:
+			var idx int
+			if idx, err = strconv.Atoi(fldPath[1]); err != nil {
+				return
+			}
+			if len(rit.WeekDays) <= idx {
+				return nil, utils.ErrNotFound
+			}
+			return rit.WeekDays[idx], nil
+		default:
+			return nil, utils.ErrNotFound
+		}
+	}
+}
+
+func (rit *RITiming) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = rit.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
diff --git a/engine/units_counter.go b/engine/units_counter.go
index 0012da03c..40cee73b9 100644
--- a/engine/units_counter.go
+++ b/engine/units_counter.go
@@ -19,6 +19,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 package engine
 
 import (
+	"fmt"
+	"strconv"
+
 	"github.com/cgrates/cgrates/utils"
 )
 
@@ -152,7 +155,6 @@ func (ucs UnitCounters) resetCounters(a *Action) {
 	}
 }
 
-/*
 func (uc *UnitCounter) String() string {
 	return utils.ToJSON(uc)
 }
@@ -163,10 +165,39 @@ func (uc *UnitCounter) FieldAsInterface(fldPath []string) (val interface{}, err
 	}
 	switch fldPath[0] {
 	default:
+		opath, indx := utils.GetPathIndex(fldPath[0])
+		if opath == utils.Counters && indx != nil {
+			if len(uc.Counters) <= *indx {
+				return nil, utils.ErrNotFound
+			}
+			c := uc.Counters[*indx]
+			if len(fldPath) == 1 {
+				return c, nil
+			}
+			return c.FieldAsInterface(fldPath[1:])
+		}
 		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
 	case utils.CounterType:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return uc.CounterType, nil
 	case utils.Counters:
-
+		if len(fldPath) == 1 {
+			return uc.Counters, nil
+		}
+		var indx int
+		if indx, err = strconv.Atoi(fldPath[1]); err != nil {
+			return
+		}
+		if len(uc.Counters) <= indx {
+			return nil, utils.ErrNotFound
+		}
+		c := uc.Counters[indx]
+		if len(fldPath) == 2 {
+			return c, nil
+		}
+		return c.FieldAsInterface(fldPath[2:])
 	}
 }
 
@@ -178,4 +209,36 @@ func (uc *UnitCounter) FieldAsString(fldPath []string) (val string, err error) {
 	}
 	return utils.IfaceAsString(iface), nil
 }
-*/
+
+func (cfs *CounterFilter) String() string {
+	return utils.ToJSON(cfs)
+}
+
+func (cfs *CounterFilter) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if cfs == nil || len(fldPath) == 0 {
+		return nil, utils.ErrNotFound
+	}
+	switch fldPath[0] {
+	default:
+		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+	case utils.Value:
+		if len(fldPath) != 1 {
+			return nil, utils.ErrNotFound
+		}
+		return cfs.Value, nil
+	case utils.Filter:
+		if len(fldPath) == 1 {
+			return cfs.Filter, nil
+		}
+		return cfs.Filter.FieldAsInterface(fldPath[1:])
+	}
+}
+
+func (cfs *CounterFilter) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = cfs.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return utils.IfaceAsString(iface), nil
+}
diff --git a/utils/consts.go b/utils/consts.go
index bd96d68d9..1c5f2c693 100644
--- a/utils/consts.go
+++ b/utils/consts.go
@@ -228,6 +228,7 @@ const (
 
 	CustomValue             = "CustomValue"
 	Value                   = "Value"
+	Filter                  = "Filter"
 	LastUsed                = "LastUsed"
 	PDD                     = "PDD"
 	Route                   = "Route"
@@ -435,6 +436,8 @@ const (
 	ActionPlans              = "ActionPlans"
 	ActionTriggers           = "ActionTriggers"
 	BalanceMap               = "BalanceMap"
+	CounterType              = "CounterType"
+	Counters                 = "Counters"
 	UnitCounters             = "UnitCounters"
 	UpdateTime               = "UpdateTime"
 	SharedGroups             = "SharedGroups"
@@ -544,6 +547,7 @@ const (
 	Blocker                  = "Blocker"
 	RatingPlanID             = "RatingPlanID"
 	StartTime                = "StartTime"
+	EndTime                  = "EndTime"
 	AccountSummary           = "AccountSummary"
 	RatingFilters            = "RatingFilters"
 	RatingFilter             = "RatingFilter"
@@ -742,6 +746,7 @@ const (
 	Load                    = "Load"
 	Slash                   = "/"
 	UUID                    = "UUID"
+	Uuid                    = "Uuid"
 	ActionsID               = "ActionsID"
 	MetaAct                 = "*act"
 	MetaAcnt                = "*acnt"
@@ -850,6 +855,9 @@ const (
 	UnitFactors             = "UnitFactors"
 	CostIncrements          = "CostIncrements"
 	Factor                  = "Factor"
+	Method                  = "Method"
+	Static                  = "Static"
+	Params                  = "Params"
 	Increment               = "Increment"
 	FixedFee                = "FixedFee"
 	RecurrentFee            = "RecurrentFee"
diff --git a/utils/map.go b/utils/map.go
index 97aeea0e4..b7abb2393 100644
--- a/utils/map.go
+++ b/utils/map.go
@@ -289,3 +289,23 @@ func (fWp FlagsWithParams) Clone() (cln FlagsWithParams) {
 	}
 	return
 }
+
+func (sm StringMap) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if sm == nil || len(fldPath) != 1 {
+		return nil, ErrNotFound
+	}
+	bl, has := sm[fldPath[0]]
+	if !has {
+		return nil, ErrNotFound
+	}
+	return bl, nil
+}
+
+func (sm StringMap) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = sm.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return IfaceAsString(iface), nil
+}
diff --git a/utils/value_formula.go b/utils/value_formula.go
index 6a236c765..67020005f 100644
--- a/utils/value_formula.go
+++ b/utils/value_formula.go
@@ -21,6 +21,7 @@ package utils
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"strconv"
 	"time"
 )
@@ -122,3 +123,41 @@ func incrementalFormula(params map[string]interface{}) float64 {
 	}
 	return 0.0
 }
+
+func (vf *ValueFormula) FieldAsInterface(fldPath []string) (val interface{}, err error) {
+	if vf == nil || len(fldPath) == 0 {
+		return nil, ErrNotFound
+	}
+	switch fldPath[0] {
+	default:
+		opath, indx := GetPathIndexString(fldPath[0])
+		if indx != nil && opath == Params {
+			return MapStorage(vf.Params).FieldAsInterface(append([]string{*indx}, fldPath[1:]...))
+		}
+		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+	case Method:
+		if len(fldPath) != 1 {
+			return nil, ErrNotFound
+		}
+		return vf.Method, nil
+	case Static:
+		if len(fldPath) != 1 {
+			return nil, ErrNotFound
+		}
+		return vf.Static, nil
+	case Params:
+		if len(fldPath) == 1 {
+			return vf.Params, nil
+		}
+		return MapStorage(vf.Params).FieldAsInterface(fldPath[1:])
+	}
+}
+
+func (vf *ValueFormula) FieldAsString(fldPath []string) (val string, err error) {
+	var iface interface{}
+	iface, err = vf.FieldAsInterface(fldPath)
+	if err != nil {
+		return
+	}
+	return IfaceAsString(iface), nil
+}