41. Unchanged Property Filter¶
The Unchanged Property Filter provides a way to discard individual datum properties that have not changed within a datum stream.
This filter is provided by the Standard Datum Filters plugin.
Tip
See the Unchanged Datum Filter for a filter that can discard entire unchanging datum (at the source ID level).
41.1 Settings¶
In addition to the Common Settings, the following general settings are available:
| Setting | Description |
|---|---|
| Default Unchanged Max Seconds | When greater than 0 then the maximum number of seconds to discard unchanged properties within a single datum stream (source ID). Use this setting to ensure a property is included occasionally, even if the property value has not changed. Having at least one value per hour in a datum stream is recommended. This time period is always relative to the last unfiltered property within a given datum stream seen by the filter. |
| Property Configurations | A list of property settings. |
41.2 Property Settings¶
Use the + and - buttons to add/remove Property configurations.
Each property source mapping configuration contains the following settings:
| Setting | Description |
|---|---|
| Property | A regular expression pattern to match against datum property names. All matching properties will be filtered. |
| Unchanged Max Seconds | When greater than 0 then the maximum number of seconds to discard unchanged properties within a single datum stream (source ID). This can be used to override the filter-wide Default Unchanged Max Seconds setting, or left blank to use the default value. |