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A provision in a statute, rule of procedure, or the like, that is a mere direction or instruction of no obligatory force and involves no invalidating consequence for its disregard, as opposed to an imperative or mandatory provision, which must be followed. The general rule is that the prescriptions of a statute relating to the performance of a public duty are so far directory that, though neglect of them may be punishable, it does not affect the validity of the acts done under them, as in the case of a statute requiring an officer to prepare and deliver a document to another officer on or before a certain day.

Generally, statutory provisions that do not relate to the essence of a thing to be done, and as to which compliance is a matter of convenience rather than of substance, are directory, while provisions that relate to the essence of a thing to be done, that is, matters of substance, are mandatory.


noun catalogue, guidebook, handbook, index, manual, reference book, reference work
See also: roll

DIRECTORY. That which points out a thing or course of proceeding; for example, a directory law.

References in periodicals archive ?
We have already extended the formal foundation of the DPF to support behavioural modelling in [31] and the DPF Workbench has been used to create a DSML for specifying health care workflows.
The DSMLs are modelling languages where the language primitives consist of domain concepts.
The availability of tools that facilitate the design and implementation of DSMLs is another important factor for the acceptance and adoption of MDE.
The Sahara desert presents the longest DSML, up to around 200 to 360 days in PROMES, CLM and CNRM-RM5.
All the simulations project DSML increases from 1951-1980 to 2021-2050 in the whole Mediterranean basin.
In our opinion, it is much easier to conclude an agreement on a DSML than a specific tool.
For instance, it is possible to achieve: the avoidance of duplication effort, emergence of high quality reusable metamodel fragments, recognition of metamodeling patterns, and reduction of time in the creation of new DSMLs.