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`core:Cardinality`
==================
Ensure the number of attribute values is within the specified multiplicity.
This filter should contain a set of attribute name => rule pairs describing the multiplicity rules for an attribute.
The special parameter `%ignoreEntities` can be used to give an array of entity IDs that should be ignored for testing, etc purposes.
A separate [`core:CardinalitySingle`](./core:authproc_cardinalitysingle) authproc filter provides additional functionality for the special case where attributes are single valued.
Specifying Rules
----------------
Multiplicity rules are specified as an associative array containing one or more of the following parameters:
`min`
: The minimum number of values (participation) this attribute should have. Defaults to `zero`.
`max`
: The maximum number of values (cardinality) this attribute should have. Defaults to no upper bound.
`warn`
: Log a warning rather than generating an error. Defaults to `false`.
For convenience, minimum and maximum values can also be specified using a shorthand list notation.
Examples
--------
Require at least one `givenName`, no more than two email addresses, and between two and four values for `eduPersonScopedAffiliation`.
'authproc' => array(
50 => array(
'class' => 'core:Cardinality',
'givenName' => array('min' => 1),
'mail' => array('max' => 2),
'eduPersonScopedAffiliation' => array('min' => 2, 'max' => 4),
),
),
Use the shorthand notation for min, max:
'authproc' => array(
50 => array(
'class' => 'core:Cardinality',
'mail' => array(0, 2),
),
),
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