Containing a command; preceptive; directory.
Obligatory; compulsory; required by authority.
Compulsory (guidance) but not required by law.
In ASN schema documentation, an obligation designation of "mandatory" means that a valid value for an element or element refinement is required in a metadata record in order for that record to be included in the Achievement Standards Repository. See also, optional, conditional, and mandatory if applicable, and recommended.