Retrieve Fixed Windows of a Specific Type from IFC Exchange

The following steps demonstrate how you can run the exchange query to retrieve a list of IFC windows of a specific type (for example: Fixed:96” x 36”’) from all the windows in an IFC Exchange.

1. Enter the following query in the Query Pane of the Data Exchange Explorer.

   Query

   query GetElementsByExchangeId($exchangeId: ID!, $elementFilter: ElementFilterInput, $elementPagination: PaginationInput) {
        exchange(exchangeId: $exchangeId) {
            id
            name
            elements(filter: $elementFilter, pagination: $elementPagination) {
                pagination {
                    pageSize
                    cursor
                }
                results {
                    id
                    name
                    properties {
                        results {
                            name
                            value
                        }
                    }
                }
            }
        }
    }
   

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2. In the Query Variables pane, enter the value of the exchangeId. To know, how to obtain the exchangeId, refer Navigate to Exchanges within a Folder.

   Assign elementFilter with the property of your choice. For this exercise, to filter IFC Windows of Fixed:96” x 36” type we will assign filter as “(property.name.IfcObject.IfcClass==IfcWindow) and (property.name.IfcObject.ObjectType==’Fixed:96” x 36”’)”.

   Note: Refer to the Advanced Filtering Capabilities page to see the list of supported filtering options.

   Additionally, set the pagination limit to any required value. You can traverse to subsequent pages by setting the cursor to the value returned in cursor field in the response

   Query Variables

   {
    "exchangeId": "ZXhjfnlwdWFzY1NicWlIT0R1R0s4OUkwTHdfTDJDfjU1MmEzMGMzLTkxYWMtNDIwNC04NzJmLWM0MDc3ZjJkZDI1YQ",
    "elementFilter": {
        "query": "(property.name.IfcObject.IfcClass==IfcWindow) and (property.name.IfcObject.ObjectType=='Fixed:96\" x 36\"')"
    },
    "elementPagination": {
        "limit": 5,
        "cursor": ""
    }
    }
   

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3. Click Play. The query will return a list of IFC windows of ObjectType==’Fixed:96" x 36" from the IFC exchange. These windows will be displayed along with their specific properties like name and value.

   Response

   {
       "data": {
           "exchange": {
           "id": "ZXhjfnlwdWFzY1NicWlIT0R1R0s4OUkwTHdfTDJDfjU1MmEzMGMzLTkxYWMtNDIwNC04NzJmLWM0MDc3ZjJkZDI1YQ",
           "name": "Urban House_1500elem_2024",
           "elements": {
               "pagination": {
               "pageSize": 2,
               "cursor": ""
               },
               "results": [
               {
                   "id": "0E2C82ED5C10B950B2757FC4EF5E1D13BB907354",
                   "name": "Fixed:96\" x 36\":712049",
                   "properties": {
                   "results": [
                       {
                       "name": "name",
                       "value": "Fixed:96\" x 36\":712049"
                       },
                       {
                       "name": "IfcObject.ObjectType",
                       "value": "Fixed:96\" x 36\""
                       },
                       {
                       "name": "IfcElement.Tag",
                       "value": "712049"
                       },
                       {
                       "name": "IfcObject.IfcClass",
                       "value": "IfcWindow"
                       },
                       {
                       "name": "Pset_WindowCommon.IsExternal",
                       "value": true
                       },
                       {
                       "name": "Pset_WindowCommon.Reference",
                       "value": "96\" x 36\""
                       },
                       {
                       "name": "Operation",
                       "value": "INSERT"
                       }
                     ]
                   }
               },
               {
                   "id": "BB608E35911E28A06E6D4682DF3C38699E805294",
                   "name": "Fixed:96\" x 36\":712080",
                   "properties": {
                   "results": [
                       {
                       "name": "name",
                       "value": "Fixed:96\" x 36\":712080"
                       },
                       {
                       "name": "Pset_WindowCommon.IsExternal",
                       "value": false
                       },
                       {
                       "name": "Pset_WindowCommon.Reference",
                       "value": "96\" x 36\""
                       },
                       {
                       "name": "IfcObject.ObjectType",
                       "value": "Fixed:96\" x 36\""
                       },
                       {
                       "name": "IfcElement.Tag",
                       "value": "712080"
                       },
                       {
                       "name": "IfcObject.IfcClass",
                       "value": "IfcWindow"
                       },
                       {
                       "name": "Operation",
                       "value": "INSERT"
                       }
                     ]
                   }
                 }
               ]
             }
           }
         }
       }
     }
   

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