Related to:

Rules, How do I get the value from a non-standard numeric format, Alerts

Problem:

How do I apply a value for a rule if I have data that is showing as a non-numeric value?

Solution:

Strings are treated as a valid number if they begin with a numerical value. All other strings, except for empty strings, are treated as 0-valued.

For the snippet above, the rule will treat it as 10 instead of the whole string.

Given this, a simple rule can be used for the value above:

if value <= 0 then
severity critical
elseif value <= 5 then
severity warning
elseif value <= 30 then
severity ok
endif

Severity output for the following values:

Some further examples are available here.

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