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core + bib (Bibliographic Extension): terms relating to books and bibliography.

timeRequired

Canonical URL: http://schema.org/timeRequired

Thing > Property > timeRequired

Approximate or typical time it takes to work with or through this learning resource for the typical intended target audience, e.g. 'P30M', 'P1H25M'.

Usage: Between 100 and 1000 domains
Values expected to be one of these types
Duration
Used on these types
CreativeWork

Schema Version 3.3