datePublished constant
datePublished [Expects: http://schema.org/Date, http://schema.org/DateTime]
Date of first publication or broadcast. For example the date a {CreativeWork
} was broadcast or a {Certification
} was issued.
Can be used on: http://schema.org/Certification, http://schema.org/CreativeWork
Implementation
static const datePublished = IriTerm.prevalidated(
'http://schema.org/datePublished',
);