Value Mapping Property Extender The resulting values are then persisted as time-series data to track state changes over time. Configure the Value Mapping property extender The Value Mapping property extender expects zero or more parameters. There are currently three parameters with a fixed name: Table 1. Value Mapping Property Extender Parameters Name Description Default value Required source-attribute The alias name of the property used for the value lookup. n/a target-type The target data-type; for example, gauge. string Optional default-value The value for entries that cannot be matched. n/a The remaining parameters are named for the input values, and their values represent the output values. SNMP Interface Property Extender Collectd Administration