# MappingTimeDeclarationType (Complex Type)

### Namespace: http://midpoint.evolveum.com/xml/ns/public/common/common-3

Specification of time-based mapping constraints.

Item Summary
Name | Type | Multiplicity | Description
--- | --- | --- | ---
description | property string | [0,1] |
referenceTime | property VariableBindingDefinitionType | [0,1] |
offset | property duration | [0,1] |
expression | property ExpressionType | [0,1] | Expression that is supposed to return the timestamp.

- ### Items

  - #### description

    Flags: RAM,runtime

    Multiplicity: [0,1]

  - #### referenceTime

    Flags: RAM,runtime

    Multiplicity: [0,1]

  - #### offset

    Flags: RAM,runtime

    Multiplicity: [0,1]

  - #### expression

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Expression that is supposed to return the timestamp. The expression may return null. In that case the time constraint will be considered unsatisfied.