mtconnectSequencePropertyPath

The "mtconnectSequencePropertyPath" property is an optional string that specifies the location in the JSON document to store the integer sequence number of the data item. Omit this property to omit it from the JSON document. This property defaults to null. 

When the FairCom MTConnect connector collects data, it generates a JSON document and stores it in the database. The connector puts the value of the MTConnect sequence attribute in the JSON document at the location specified by this property. You may use a simple property name, such as "temperatureSequence", or a complex JSON path, such as "temperature.sequence". For examples, see Example property paths that group related properties.

When the FairCom MTConnect Connector requests data over the MTConnect protocol, the device returns an <MTConnectStreams> XML document, which contains data elements. A data element contains the dataItemId and sequence attributes. The sequence attribute identifies the device's sequence number of the data value.

In the following MTConnectStreams XML document returned over the MTConnect protocol, the data element has a dataItemId of "X1_Stamper1_Temperature". The element is named REAL. The value of the sequence attribute is 5. The MTConnect connector converts the sequence number into a JSON integer.

<MTConnectStreams>
  <Streams>
    <DeviceStream 
      name="X1" 
      uuid="X1_373f-4ab9-9c7a-173edd23e4f3">
      <ComponentStream 
        component="Device" 
        name="Stamper1" 
        componentId="X1_Stamper1">
        <Samples>
          <REAL 
            dataItemId="X1_Stamper1_Temperature"
            name="Temperature"
            sequence="5" 
            timestamp="2010-04-06T06:19:35.153141"
            >20.1</REAL>
        </Samples>
      </ComponentStream>
    </DeviceStream>
  </Streams>
</MTConnectStreams>