Struct CheckSpec 

pub struct CheckSpec {
    pub check: &'static str,
    pub title: &'static str,
    pub severity: Severity,
    pub rank: u8,
    pub advice: &'static [&'static str],
    pub grouping: Grouping,
    pub evidence: Evidence,
    pub rows_are: &'static str,
    pub noun: &'static str,
    /* private fields */
}

One kind of check. Everything about a kind but its emitter and the predicate beside it (QualityObservation::evidence_predicate) is here.

Fields

check: &'static str

The check that makes it, by the name the Checks list gives it.

title: &'static str

The finding’s title, unless a Variant reads it another way.

severity: Severity

rank: u8

Order within a severity: what costs the most rows of trust first.

advice: &'static [&'static str]

What it means for the data and what to do about it, a fragment a line. The reader knows what a null is; this says only what is particular.

grouping: Grouping

evidence: Evidence

rows_are: &'static str

What the rows Enter opens are, after their count: “ that have a copy“.

noun: &'static str

What its rows hold, after “N of M rows (P%)”: “null”.