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What | Required | Description | schema location |
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ValidationRulesets.xml | no | Definition of validation rule sets | http://fews.wldelft.nl/schemas/version1.0/validationRuleSets.xsd |
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Validation rules are defined in DELFT-FEWS to allow quality checking of all time series data (scalar time series only). Several validation criteria may be defined per time series. All validation rules for all time series are defined in this configuration. For each time series to be checked, a set of validation rules is defined. Defining validation rules to apply to a time series set using a locationSet rather than identifying series individually can simplify the configuration greatly. Most validation rules may be defined either as a constant value, or as a value valid per calendar month.
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Time series of data can be validated on series of same readings. This may be unlikely for field observations, and may indicate an instrumental error. In some cases a small variability may still be observed, despite instrumental error. The same readings check allows for defining a bandwidth within the value is considered to be the same.
Figure 36 Elements of the same reading configuration of the ValidationRuleSets.
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Time series of data can be validated on temporary shifts. These occur when instruments are reset, and can be identified by the values rapidly falling to a constant value, remaining at that value for a short period of time and then returning to the original value range. A complex set of validation criteria include the rate of change as well as a maximum time the value remains the same.
Figure 37 Elements of the temporary shift configuration of the ValidationRuleSets.
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Example for "Rate of Rise" and "Temporary Shift" validation rules
Examples of validation rules
Example for "Rate of Rise" and "Temporary Shift" validation rules