====Default====

Sets default values for frame attributes.

===Parameters===

^Name^Default^Meaning^
|values||A list of attribute names|
|value|0|A value to capture if //no value exists//.|

===Description===

This layer is usually used at the beginning or at the end of a Layered Frame Analytic to fill in any default values for attributes that couldn't be captured.

For example, you might choose to set a value to '0' if it couldn't be calculated.

Because key values are //required// for the capture to be added to the database, this layer is most often used to ensure all keys have valid values.

===Example===

If the frame contains the following attributes...

^Attribute^Value^
|Max Temperature|120|
|Max Speed|15.42|

<code javascript>
{
   "type": "default",
   "values": ["Max Temperature","Max Vibration"],
   "value": 0
}
</code>

Your final frame would contain the following values...

^Attribute^Value^
|Max Temperature|120|
|Max Speed|15.42|
|Max Vibration|0|

Note that the existing value for temperature isn't changed.