Understand types, properties and inheritance
Why a Dentist can use properties inherited from both a place and an organization.
Follow the type hierarchy
Specific types inherit from broader types. Multiple inheritance means an entity may participate in more than one branch. This lets a specialized business carry both organizational information and a physical location.
Read expected types correctly
Property definitions describe the types commonly associated with a property and the expected values. Schema.org is deliberately flexible: these expectations are not the same as a rigid database constraint. CheckMySchema therefore reports many compatibility problems as warnings.
Use the vocabulary explorer
Look up a term to inspect its parent types, usual domains, expected ranges and replacement terms. Follow the canonical definition when deciding whether an unusual use is intentional.
Go deeper with the official sources
Schema.org data modelComplete type hierarchyThis is an original explanatory guide, not an official search-engine document. Requirements can change. Follow the linked sources for full, current details.