diff --git a/src/formater-catalogue.vue b/src/formater-catalogue.vue
index 8a4ad90..0707362 100644
--- a/src/formater-catalogue.vue
+++ b/src/formater-catalogue.vue
@@ -157,6 +157,7 @@ export default {
         var metadata = this.metadatas[this.metadatas.length -1]
         this.currentUuid = metadata['geonet:info'].uuid
         var parameters = metadata.osParameters
+        var mapping = metadata.mapping
         var min = null
         var max = null
         if (metadata.tempExtentBegin) {
@@ -173,9 +174,10 @@ export default {
       } else {
         this.currentUuid = null
         var parameters = []
+        var mapping = []
         this.$store.commit('temporalChange', this.temporalExtent)
       }
-      this.$store.commit('parametersChange', parameters)
+      this.$store.commit('parametersChange', {parameters: parameters, mapping: mapping})
       var event = new CustomEvent('fmt:closeMetadataEvent', {detail:  {depth: this.metadatas.length }})
       document.dispatchEvent(event)
     },
diff --git a/src/formater-metadata.vue b/src/formater-metadata.vue
index 6db4fda..7efbf4c 100644
--- a/src/formater-metadata.vue
+++ b/src/formater-metadata.vue
@@ -43,26 +43,26 @@
       <div v-if="tabs.search" v-show="currentTab === 'search'">
            
            <formater-paging  :nb-record="nbRecord" :type="type" :record-by-line="recordByLine" :depth="depth + 1"></formater-paging>
-      		<formater-list-metadata  :depth="depth + 1"  :capsule-width="capsuleWidth"></formater-list-metadata>
+              <formater-list-metadata  :depth="depth + 1"  :capsule-width="capsuleWidth"></formater-list-metadata>
       </div>
       <!--  others tab -->
       <div v-if="currentTab === 'main'" style="margin-top:20px;">
-	      <div class="mtdt-description">
-	        <formater-quicklooks :quicklooks="meta.images"></formater-quicklooks>
-	        <span v-html="meta.description"></span>
-	      </div>
-		  <div class="mtdt-temporalExtent" style="clear:both;" v-if="meta.tempExtentBegin">
-			<h2><i class="fa fa-clock-o"></i>{{$t('temporal_extent')}}</h2>
-			 <div>
-			    {{date2str(meta.tempExtentBegin)}}
-			    <i class="fa fa-long-arrow-right" ></i>
-			    {{date2str(meta.tempExtentEnd)}}
-			</div>
-		  </div>
-		  <div >
-	          <formater-list-contact   :responsible-party="meta.responsibleParty" :responsible-party2="metaLang2.responsibleParty"></formater-list-contact>
-	     </div>
-	 
+          <div class="mtdt-description">
+            <formater-quicklooks :quicklooks="meta.images"></formater-quicklooks>
+            <span v-html="meta.description"></span>
+          </div>
+          <div class="mtdt-temporalExtent" style="clear:both;" v-if="meta.tempExtentBegin">
+            <h2><i class="fa fa-clock-o"></i>{{$t('temporal_extent')}}</h2>
+             <div>
+                {{date2str(meta.tempExtentBegin)}}
+                <i class="fa fa-long-arrow-right" ></i>
+                {{date2str(meta.tempExtentEnd)}}
+            </div>
+          </div>
+          <div >
+              <formater-list-contact   :responsible-party="meta.responsibleParty" :responsible-party2="metaLang2.responsibleParty"></formater-list-contact>
+         </div>
+     
       </div>
       <div v-if="currentTab === 'complement'" >
              <formater-list-contact   :responsible-party="meta.responsibleParty" :responsible-party2="metaLang2.responsibleParty"></formater-list-contact>
@@ -143,25 +143,9 @@ export default {
      metaLang2: {},
      popstateListener: null,
      keydownListener: null,
-     searchEventListener: null,
-    // srv: process.env.GEONETWORK + 'srv/' + (this.lang === 'fr'? 'fre' : 'eng') + '/',
-    // api: process.env.GEONETWORK + '/srv/api/',
-     headers: {
-       'Accept': 'application/json, text/plain, */*',
-       'Accept-Language': this.$i18n.locale === 'fr' ? 'fre': 'eng'
-     },
+
      describe: null,
-    // parameters: {},
-    // recordByLine: 4,
      nbRecord: 12,
-     // use for opensearch api
-//     api: null,
-//      geographic: ['geometry', 'box', 'lat', 'lon', 'radius'],
-//      paging: ['maxRecords', 'index', 'page'],
-//      removedFields: ['lang', 'name', 'q', 'organisationName', 'parentIdentifier'],
-//      osParameters: [],
-//      geoParameters: [],
-//      pagingParameters: [],
      type: 'geonetwork'
     }
   },
@@ -244,8 +228,9 @@ export default {
            this.setHasChild(false)
          }
       },
-      setParameters(value) {
-        this.metadata.osParameters = value
+      setParameters(osParameters) {
+        this.metadata.osParameters = osParameters.parameters
+        this.metadata.mapping = osParameters.mapping
         this.setHasChild(true)
       },
       setHasChild(value) {
@@ -255,42 +240,39 @@ export default {
           this.currentTab = 'search'
           this.getRecords()
         } else {
-          this.$store.commit('parametersChange', [])
+          this.$store.commit('parametersChange', {parameters: [], mapping:[]})
         }
       },
-	  fillMetadata () {
-	     //get meta from other language if meta._locale != meta.docLocale
-	     if (this.meta['geonet:info']) {
-	       this.uuid = this.meta['geonet:info'].uuid;
-	     } else {
-	       this.uuid = this.meta.id
-	     }
+      fillMetadata () {
+         //get meta from other language if meta._locale != meta.docLocale
+         if (this.meta['geonet:info']) {
+           this.uuid = this.meta['geonet:info'].uuid;
+         } else {
+           this.uuid = this.meta.id
+         }
 
-	     if (this.meta._locale ===  this.meta.docLocale) {
-	       
-	       return
-	     }
-	     
-	     var url = this.$store.state.geonetwork + 'srv/'+this.meta.docLocale+'/q?_content_type=json&fast=index&uuid=' + this.uuid;
-	     var _this = this
-	     this.$http.get(url).then(
+         if (this.meta._locale ===  this.meta.docLocale) {
+           
+           return
+         }
+         
+         var url = this.$store.state.geonetwork + 'srv/'+this.meta.docLocale+'/q?_content_type=json&fast=index&uuid=' + this.uuid;
+         var _this = this
+         this.$http.get(url).then(
                response => {
                 // _this.extract(response.body.metadata)
                  _this.metaLang2 = response.body.metadata
                } 
-       	 )
-       	 if (this.meta.related && this.meta.related.children) {
-       	   this.hasChild = true
-       	   this.getRecords()
-       	 } 
-	  },
-
-	  getRecords () {
+            )
+            if (this.meta.related && this.meta.related.children) {
+              this.hasChild = true
+              this.getRecords()
+            } 
+      },
+      getRecords () {
           // useless, it's trigger when load formater-page-changed
-      	  // lance le requeteur
-//       	  console.log('search child from metadata')
-      	  var event = new CustomEvent('fmt:metadataWithChildEvent', {detail: {uuid: this.uuid, depth: this.depth}})
-      	  document.dispatchEvent(event)
+          var event = new CustomEvent('fmt:metadataWithChildEvent', {detail: {uuid: this.uuid, depth: this.depth}})
+          document.dispatchEvent(event)
       },
      
   }
@@ -332,8 +314,8 @@ export default {
 .mtdt-metadata h2,
 .mtdt-metadata h3,
 .mtdt-metadata h4{
-    max-width: 100%;
-    color:#754a15;
+  max-width: 100%;
+  color:#754a15;
 }
 .mtdt-metadata h2 {
 
@@ -363,13 +345,13 @@ export default {
   line-height:1.5;
 }
 .mtdt-metadata .mtdt-group-logo{
-    float:right;
-    margin-top:-5px;
-    margin-right: 15px;
+  float:right;
+  margin-top:-5px;
+  margin-right: 15px;
 }
 .mtdt-metadata .mtdt-group-logo img{
-	max-width:100px; 
-	height:40px;
+  max-width:100px; 
+  height:40px;
 }
 .mtdt-metadata .mtdt-contacts h3{
     margin-bottom:0;
diff --git a/src/formater-opensearch.vue b/src/formater-opensearch.vue
index b6e5253..39fb9f2 100644
--- a/src/formater-opensearch.vue
+++ b/src/formater-opensearch.vue
@@ -8,7 +8,9 @@
  
 <template></template>
 <script>
-
+function getKeyByValue(object, value) {
+  return Object.keys(object).find(key => object[key] === value);
+}
 export default {
   name: 'FormaterOpensearch',
   props: {
@@ -38,12 +40,12 @@ export default {
     return {
       searchEventListener: null,
       api: null,
-      geographic: ['geometry', 'box', 'lat', 'lon', 'radius'],
-      paging: ['maxRecords', 'index', 'page'],
-      osParameters: [],
-      geoParameters: [],
-      pagingParameters: [],
-      parameters: []
+      // associative array of: parameter name in this application => name in the opensearch api
+      // for the predefined parameters like box, temporalExtent, and paging (common for all api)
+      mappingParameters: [],
+      // list of others specific opensearch api parameters 
+      // { name, title, pattern, min, max, options}
+      osParameters: []
     }
   },
   methods: {
@@ -53,12 +55,22 @@ export default {
            response => { this.extractDescribeParameters(response.body);}
         )
     },
-    extractParameter (parameterNode) {
+    extractParameter (parameterNode, specName) {
+      var listPredefined = this.$store.state.parameters.predefined
+      // name in this application
+      var appName = getKeyByValue(listPredefined, specName)
+      // name in the opensearch api
       var name = parameterNode.getAttribute('name')
+      if (typeof appName !== 'undefined') {
+        this.mappingParameters[appName] = name
+        return
+      }
+      
       var obj= {
           name: name,
           title: parameterNode.getAttribute('title')
       }
+      
       var pattern = parameterNode.getAttribute('pattern')
       if (pattern) {
         obj = Object.assign(obj, {pattern: pattern})
@@ -87,11 +99,12 @@ export default {
 //       } else if (name.toLowerCase() === 'q'){
 //         this.hasQ = true
 //      } else
-        if (this.geographic.indexOf(name) >=0) {
-        this.geoParameters.push(obj)
-      } else if (this.paging.indexOf(name) >= 0) {
-         this.pagingParameters.push(obj)
-      }else if (name.indexOf('Date') === -1 && name.indexOf('Cover') === -1 && (!obj.options || obj.options.length > 1)) {
+//         if (this.geographic.indexOf(name) >=0) {
+//         this.geoParameters.push(obj)
+//       } else if (this.paging.indexOf(name) >= 0) {
+//          this.pagingParameters.push(obj)
+//       }else 
+      if (!obj.options || obj.options.length > 1) {
         this.osParameters.push(obj)
       }
     },
@@ -100,7 +113,8 @@ export default {
       var parser = new DOMParser()
       var xml = parser.parseFromString(parametersString, 'text/xml')
       var urls = xml.firstChild.childNodes
-     var url = null
+      var url = null
+      // loop to find the good url
       urls.forEach(function (node) {
          if (node.tagName && node.tagName.toLowerCase() === 'url' && node.getAttribute('type').indexOf('json') >= 0) {
            var template = node.getAttribute('template')
@@ -123,72 +137,21 @@ export default {
       var parameters = url.getElementsByTagName('parameters:Parameter')
       var self = this
       var regexList = this.$store.state.parameters.excluedRegex
+      // loop on the parameters node
       for(var i=0; i < parameters.length; i++){
-        var value = parameters[i].getAttribute('value')
-       
+        var specName = parameters[i].getAttribute('value')
+        // search if the parameter is exclued (@see list in store/index.js)
         var isExclued = regexList.some(function(str) {
           var rx = new RegExp(str)
-          return rx.test(value)
+          return rx.test(specName)
         })
-        if (isExclued) {
-          console.log(value)
-        }
-        
         if (!isExclued) {
-          var obj = self.extractParameter(parameters[i])
+          var obj = self.extractParameter(parameters[i] , specName)
         }
-//         var name = parameters[i].getAttribute('name')
-//         var obj= {
-//             name: name,
-//             title: parameters[i].getAttribute('title')
-//         }
-//         var pattern = parameters[i].getAttribute('pattern')
-//         if (pattern) {
-//           obj = Object.assign(obj, {pattern: pattern})
-//         }
-//         var min = parameters[i].getAttribute('minInclusive')
-//         if (min) {
-//           obj= Object.assign(obj, {min: min})
-//         }
-//         var max = parameters[i].getAttribute('maxInclusive')
-//         if (max) {
-//           obj = Object.assign(obj, {max: max})
-//         }
-//         var nodes = parameters[i].getElementsByTagName('parameters:Options')
-//         if (nodes) {
-//           var options= []
-//           for(var k=0; k < nodes.length; k++) {
-//             options.push(nodes[k].getAttribute('value'))
-//           }
-//           if (options.length > 0)
-//           obj = Object.assign(obj, {options: options})
-//         }
-//         if (self.removedFields.indexOf(name) >=0) {
-          
-// //         }else if (name.toLowerCase() === 'platform') {
-// //           this.platform = obj
-// //         } else if (name.toLowerCase() === 'q'){
-// //           this.hasQ = true
-//         } else if (self.geographic.indexOf(name) >=0) {
-//           self.geoParameters.push(obj)
-//         } else if (self.paging.indexOf(name) >= 0) {
-//            self.pagingParameters.push(obj)
-//         }else if (name.indexOf('Date') === -1 && name.indexOf('Cover') === -1 && (!obj.options || obj.options.length > 1)) {
-//           self.osParameters.push(obj)
-//         }
         
       }
-      console.log('FIN DU DESCRIBE 2')
-      this.$emit('parametersChange', this.osParameters)
-      
-      this.$store.commit('parametersChange', this.osParameters)
-      // modification des paramètres
-//       var evt = new CustomEvent('fmt:changeParametersEvent', {detail: {parameters: this.osParameters}})
-//       document.dispatchEvent(evt)
-//       var event = new CustomEvent('fmt:metadataWithChildEvent', {detail: {uuid: this.uuid, depth: this.depth}})
-//       	  document.dispatchEvent(event)
-     
-      // this.requestApi(searchParameters)
+      this.$emit('parametersChange', {parameters:this.osParameters, mapping: this.mappingParameters})
+      this.$store.commit('parametersChange', {parameters:this.osParameters, mapping: this.mappingParameters})
     },
     handleSearch(e) {
       if (this.api && e.detail.parentUuid === this.uuid) {
diff --git a/src/formater-requester.vue b/src/formater-requester.vue
index f6214be..f35905f 100644
--- a/src/formater-requester.vue
+++ b/src/formater-requester.vue
@@ -211,25 +211,35 @@ export default {
     },
     prepareRequestOpensearch(e) {
       this.initParameters()
-      if (!e.detail.startDefault) {
-        e.detail.renameProperty('start', 'firstDateMin')
-      } else {
+       if (e.detail.startDefault) {
         delete e.detail.start
       }
       if (e.detail.endDefault) {
-        delete e.detail.endDefault
         delete e.detail.end
-        
-      } else {
-        e.detail.renameProperty('end', 'secondDateMax')
-      }
-      delete e.detail.startDefault
-      delete e.detail.endDefault
-      delete e.detail.depth
+      } 
+      this.mapParameters(e)
       
       this.parameters = Object.assign(this.parameters, e.detail)   
 
     },
+    mapParameters(e) {
+      // transform the name of parameter from this application to the opensearch api for the predefined parameter
+      // or test if it is an opensearch parameter
+      var specificParameters = this.$store.state.parameters.others
+      var mappingParameters = this.$store.state.parameters.mapping
+      for(var name in e.detail){
+        var isSpecific = specificParameters.find(function (obj) {
+          if (obj.name === name) {
+            return true
+          }
+        })
+        if (typeof mappingParameters[name] !== 'undefined') {
+          e.detail.renameProperty(name, mappingParameters[name])
+        } else if (!isSpecific) {
+          delete e.detail[name]
+        } 
+      }
+    },
     requestApi ()  {
         switch (this.type) {
         case 'geonetwork':
diff --git a/src/store/index.js b/src/store/index.js
index 31063fb..6fee838 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -40,7 +40,12 @@ export default function makeStore( config ) {
           index: "{startIndex}",
           page: "{startPage}"
         },
-        renamePredefined:{},
+        // FOR THE CURRENT API opensearch: 2 arrays (empty by default)
+        // associative array of: parameter name in this application => name in the opensearch api
+        // for the predefined parameters like box, temporalExtent, and paging (common for all api)
+        mapping:[],
+        // list of others specific opensearch api parameters 
+        // { name, title, pattern, min, max, options}
         others: []
       }
   }
@@ -59,7 +64,9 @@ export default function makeStore( config ) {
         state.searchArea = newBounds
       },
       parametersChange(state, newParameters) {
-        state.parameters.others = newParameters
+        console.log('PARAMETERS CHANGE', newParameters)
+        state.parameters.others = newParameters.parameters
+        state.parameters.mapping = newParameters.mapping
       }
     },
     getters: {