Enum Cardinality 

pub enum Cardinality {
    One,
    ZeroOrOne,
    ZeroOrMore,
    OneOrMore,
}

Cardinality constraint on a field — how many values may / must be supplied.

Maps directly to DSP-API’s owl:cardinality / owl:minCardinality / owl:maxCardinality triple (Decision 1 — only 0/1 bounds are emitted). Derives Copy (fieldless). Display produces the CONTEXT.md canonical notation (1, 0-1, 0-n, 1-n), matching dsp-tools’ native data-model format. No serde derive.

Variants

One

Exactly one value required (owl:cardinality 1). Display: "1".

ZeroOrOne

At most one value, may be absent (owl:maxCardinality 1). Display: "0-1".

ZeroOrMore

Any number of values, may be absent (owl:minCardinality 0). Display: "0-n".

OneOrMore

At least one value required (owl:minCardinality 1). Display: "1-n".

Trait Implementations

impl Clone for Cardinality

fn clone(&self) -> Cardinality

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Cardinality

impl Debug for Cardinality

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Cardinality

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Cardinality

impl PartialEq for Cardinality

fn eq(&self, other: &Cardinality) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Cardinality