diff --git a/discovery/Host.go b/discovery/Host.go
index 7061225..0a7a6a1 100644
--- a/discovery/Host.go
+++ b/discovery/Host.go
@@ -28,7 +28,7 @@ type Host struct {
 	HostModel  string `json:"hostModel,omitempty"`
 
 	Meta           map[string]map[string]string `json:"meta,omitempty"`
-	DiscoveredBy   []string                     `json:"discoveredBy,omitempty"`
+	DiscoveredBy   []*meta.MetaDiscovererType   `json:"discoveredBy,omitempty"`
 	DiscoveredDate *util.Timestamp              `json:"discoveredDate,omitempty"`
 
 	Zone     *Zone   `json:"zone,omitempty"`
diff --git a/discovery/Port.go b/discovery/Port.go
index 338274c..d546f40 100644
--- a/discovery/Port.go
+++ b/discovery/Port.go
@@ -14,7 +14,7 @@ type Port struct {
 	PortNumber   json.Number        `json:"portNumber,omitempty"`
 
 	Meta           map[string]map[string]string `json:"meta,omitempty"`
-	DiscoveredBy   []string                     `json:"discoveredBy,omitempty"`
+	DiscoveredBy   []*meta.MetaDiscovererType   `json:"discoveredBy,omitempty"`
 	DiscoveredDate *util.Timestamp              `json:"discoveredDate,omitempty"`
 
 	Host        *Host          `json:"host,omitempty"`
diff --git a/discovery/Service.go b/discovery/Service.go
index 5742013..d06bab3 100644
--- a/discovery/Service.go
+++ b/discovery/Service.go
@@ -26,7 +26,7 @@ type Service struct {
 	ServiceVersion string `json:"serviceVersion,omitempty"`
 
 	Meta           map[string]map[string]string `json:"meta,omitempty"`
-	DiscoveredBy   []string                     `json:"discoveredBy,omitempty"`
+	DiscoveredBy   []*meta.MetaDiscovererType   `json:"discoveredBy,omitempty"`
 	DiscoveredDate *util.Timestamp              `json:"discoveredDate,omitempty"`
 
 	Port *Port `json:"port,omitempty"`
diff --git a/discovery/Zone.go b/discovery/Zone.go
index 190d89e..7bef950 100644
--- a/discovery/Zone.go
+++ b/discovery/Zone.go
@@ -15,7 +15,7 @@ type Zone struct {
 	Mac        string           `json:"mac,omitempty"`
 
 	Meta           map[string]map[string]string `json:"meta,omitempty"`
-	DiscoveredBy   []string                     `json:"discoveredBy,omitempty"`
+	DiscoveredBy   []*meta.MetaDiscovererType   `json:"discoveredBy,omitempty"`
 	DiscoveredDate *util.Timestamp              `json:"discoveredDate,omitempty"`
 
 	mtx sync.RWMutex `json:"-"`
diff --git a/meta/MetaDiscovererType.go b/meta/MetaDiscovererType.go
new file mode 100644
index 0000000..26871db
--- /dev/null
+++ b/meta/MetaDiscovererType.go
@@ -0,0 +1,89 @@
+package meta
+
+import (
+	"encoding/json"
+
+	"git.loafle.net/overflow/model/util"
+)
+
+type MetaDiscovererType struct {
+	ID         json.Number     `json:"id,Number,omitempty"`
+	Name       string          `json:"name,omitempty"`
+	Key        string          `json:"key,omitempty"`
+	CreateDate *util.Timestamp `json:"createDate,omitempty"`
+}
+
+type MetaDiscovererTypeEnum int
+
+const (
+	MetaDiscovererTypeEnumUNKNOWN MetaDiscovererTypeEnum = iota + 1
+	MetaDiscovererTypeEnumARP
+	MetaDiscovererTypeEnumICMP
+	MetaDiscovererTypeEnumMDNS
+	MetaDiscovererTypeEnumNDP
+	MetaDiscovererTypeEnumSNMP
+	MetaDiscovererTypeEnumTCPACK
+	MetaDiscovererTypeEnumTCPFIN
+	MetaDiscovererTypeEnumTCPNULL
+	MetaDiscovererTypeEnumTCPXmas
+	MetaDiscovererTypeEnumTCPSyn
+	MetaDiscovererTypeEnumTCPConnection
+	MetaDiscovererTypeEnumTCPMatcher
+	MetaDiscovererTypeEnumUDPConnection
+	MetaDiscovererTypeEnumUDPMatcher
+	MetaDiscovererTypeEnumUPnP
+)
+
+var (
+	metaDiscovererTypeEnumID = map[MetaDiscovererTypeEnum]string{
+		MetaDiscovererTypeEnumUNKNOWN:       "UNKNOWN",
+		MetaDiscovererTypeEnumARP:           "ARP",
+		MetaDiscovererTypeEnumICMP:          "ICMP",
+		MetaDiscovererTypeEnumMDNS:          "MDNS",
+		MetaDiscovererTypeEnumNDP:           "NDP",
+		MetaDiscovererTypeEnumSNMP:          "SNMP",
+		MetaDiscovererTypeEnumTCPACK:        "TCPACK",
+		MetaDiscovererTypeEnumTCPFIN:        "TCPFIN",
+		MetaDiscovererTypeEnumTCPNULL:       "TCPNULL",
+		MetaDiscovererTypeEnumTCPXmas:       "TCPXmas",
+		MetaDiscovererTypeEnumTCPSyn:        "TCPSyn",
+		MetaDiscovererTypeEnumTCPConnection: "TCPConnection",
+		MetaDiscovererTypeEnumTCPMatcher:    "TCPMatcher",
+		MetaDiscovererTypeEnumUDPConnection: "UDPConnection",
+		MetaDiscovererTypeEnumUDPMatcher:    "UDPMatcher",
+		MetaDiscovererTypeEnumUPnP:          "UPnP",
+	}
+
+	metaDiscovererTypeEnumKey = map[string]MetaDiscovererTypeEnum{
+		"UNKNOWN":       MetaDiscovererTypeEnumUNKNOWN,
+		"ARP":           MetaDiscovererTypeEnumARP,
+		"ICMP":          MetaDiscovererTypeEnumICMP,
+		"MDNS":          MetaDiscovererTypeEnumMDNS,
+		"NDP":           MetaDiscovererTypeEnumNDP,
+		"SNMP":          MetaDiscovererTypeEnumSNMP,
+		"TCPACK":        MetaDiscovererTypeEnumTCPACK,
+		"TCPFIN":        MetaDiscovererTypeEnumTCPFIN,
+		"TCPNULL":       MetaDiscovererTypeEnumTCPNULL,
+		"TCPXmas":       MetaDiscovererTypeEnumTCPXmas,
+		"TCPSyn":        MetaDiscovererTypeEnumTCPSyn,
+		"TCPConnection": MetaDiscovererTypeEnumTCPConnection,
+		"TCPMatcher":    MetaDiscovererTypeEnumTCPMatcher,
+		"UDPConnection": MetaDiscovererTypeEnumUDPConnection,
+		"UDPMatcher":    MetaDiscovererTypeEnumUDPMatcher,
+		"UPnP":          MetaDiscovererTypeEnumUPnP,
+	}
+)
+
+func (e MetaDiscovererTypeEnum) String() string {
+	return metaDiscovererTypeEnumID[e]
+}
+
+func ToMetaDiscovererTypeEnum(v *MetaDiscovererType) MetaDiscovererTypeEnum {
+	return metaDiscovererTypeEnumKey[v.Key]
+}
+
+func ToMetaDiscovererType(v MetaDiscovererTypeEnum) *MetaDiscovererType {
+	return &MetaDiscovererType{
+		Key: metaDiscovererTypeEnumID[v],
+	}
+}