diff --git a/experimental/examples/new-disk.json b/experimental/examples/new-disk.json
index 293f33266..6aae4bd4b 100644
--- a/experimental/examples/new-disk.json
+++ b/experimental/examples/new-disk.json
@@ -22,7 +22,8 @@
 	"value": "100 * {disk.used} / {disk.size}",
 	"uom": "%",
 	"min": 0,
-	"max": 100
+	"max": 100,
+	"output": "{prefix}: {metrics.value}% used"
       },
       {
 	"prefix": "{disk.label}",
@@ -42,6 +43,16 @@
 	"max": 100
       }
     ]
+  },
+  "output": {
+    "ok": "Disk usage OK: {aggregations.avg.disk.usage.percent}% used",
+    "detail_ok": false,
+    "warning": "Disk usage WARNING:",
+    "detail_warning": true,
+    "critical": "Disk usage CRITICAL:",
+    "detail_critical": true,
+    "instance_separator": " - ",
+    "metric_separator": ", "
   }
 }
 
diff --git a/experimental/examples/new-disk.json.example b/experimental/examples/new-disk.json.example
index 2c30de6c1..92cbd6f88 100644
--- a/experimental/examples/new-disk.json.example
+++ b/experimental/examples/new-disk.json.example
@@ -4,7 +4,7 @@
       {
 	"name": "disk",
 	"oid": "1.3.6.1.2.1.25.2.3.1",
-	"query": "Walk",	    // par défaut walk
+	"query": "Walk",
 	"labels": {
 	  ".3": "label",
 	  ".4": "allocationUnits",
@@ -17,30 +17,42 @@
   "compute": {
     "metrics": [
       {
-	"prefix": "{disk.label}",		// par défaut "{idx}"
-	"name": "disk.usage.percent",		// le nom final est `prefix`#`name`
+	"prefix": "{disk.label}",
+	"name": "disk.usage.percent",
 	"value": "100 * {disk.used} / {disk.size}",
-	"uom": "%",	    // optional
-	"min": 0,	    // optional
-	"max": 100,	    // optional
+	"uom": "%",
+	"min": 0,
+	"max": 100,
+	"output": "{prefix}: {metrics.value}% used"       // optional : displayed if output. Default value: "{metrics.prefix}: {value}{metrics.uom}"
       },
       {
+	"prefix": "{disk.label}",
 	"name": "disk.usage.bytes",
 	"value": "{disk.used} * {disk.allocationUnits}",
-	"uom": "B",	    // optional
-	"min": 0,	    // optional
-	"max_expr": "{disk.size} * {disk.allocationUnits}"  // optional
+	"uom": "B",
+	"min": 0,
+	"max_expr": "{disk.size} * {disk.allocationUnits}"
       }
     ],
     "aggregations": [
       {
         "name": "avg.disk.usage.percent",
-	"value": "Average({metrics.disk.usage.percent})",	  // si agregation, pas de prefix
-	"uom": "%",     // optional
-	"min": 0,       // optional
-	"max": 100      // optional
+	"value": "Average({metrics.disk.usage.percent})",
+	"uom": "%",
+	"min": 0,
+	"max": 100
       }
     ]
+  },
+  "output": {
+    "ok": "Disk usage OK: {aggregations.avg.disk.usage.percent}% used",	// optional: default value: "Everything is OK"
+    "detail_ok": False,                                                 // optional: default value: False, if True, metrics are concatenated to the output
+    "warning": "Disk usage WARNING:",                                   // optional: default value: "WARNING:"
+    "detail_warning": True,                                             // optional: default value: True
+    "critical": "Disk usage CRITICAL:",                                 // optional: default value: "CRITICAL:"
+    "detail_critical": True,                                            // optional: default value: True
+    "instance_separator": " - ",                                        // optional: default value: " - "
+    "metric_separator": ", ",                                           // optional: default value: ", "
   }
 }
 
diff --git a/experimental/src/generic/mod.rs b/experimental/src/generic/mod.rs
index 974bc8885..98fde6455 100644
--- a/experimental/src/generic/mod.rs
+++ b/experimental/src/generic/mod.rs
@@ -80,10 +80,55 @@ pub struct Collect {
     snmp: Vec<Snmp>,
 }
 
+#[derive(Deserialize, Debug)]
+pub struct Output {
+    #[serde(default = "default_ok")]
+    ok: String,
+    #[serde(default = "default_detail_ok")]
+    detail_ok: bool,
+    #[serde(default = "default_warning")]
+    warning: String,
+    #[serde(default = "default_detail_warning")]
+    detail_warning: bool,
+    #[serde(default = "default_critical")]
+    critical: String,
+    #[serde(default = "default_detail_critical")]
+    detail_critical: bool,
+    #[serde(default = "default_instance_separator")]
+    instance_separator: String,
+    #[serde(default = "default_metric_separator")]
+    metric_separator: String,
+}
+fn default_ok() -> String {
+    "Everything is OK".to_string()
+}
+fn default_detail_ok() -> bool {
+    false
+}
+fn default_warning() -> String {
+    "WARNING: ".to_string()
+}
+fn default_detail_warning() -> bool {
+    true
+}
+fn default_critical() -> String {
+    "CRITICAL: ".to_string()
+}
+fn default_detail_critical() -> bool {
+    true
+}
+fn default_instance_separator() -> String {
+    " - ".to_string()
+}
+fn default_metric_separator() -> String {
+    ", ".to_string()
+}
+
 #[derive(Deserialize, Debug)]
 pub struct Command {
     collect: Collect,
     compute: Compute,
+    output: Output,
 }
 
 #[derive(Debug)]
@@ -252,7 +297,8 @@ impl Command {
                                 panic!("A label must be a string");
                             }
                         };
-                        let current_status = compute_status(*item, &metric.warning, &metric.critical)?;
+                        let current_status =
+                            compute_status(*item, &metric.warning, &metric.critical)?;
                         status = worst(status, current_status);
                         let w = match metric.warning {
                             Some(ref w) => Some(w.as_str()),
@@ -361,7 +407,8 @@ impl Command {
                                     res
                                 }
                             };
-                            let current_status = compute_status(item, &metric.warning, &metric.critical)?;
+                            let current_status =
+                                compute_status(item, &metric.warning, &metric.critical)?;
                             status = worst(status, current_status);
                             let w = match metric.warning {
                                 Some(ref w) => Some(w.as_str()),