Custom Metadata Relationships

Like other relationships in Salesforce, custom metadata relationships have a particular domain. When you create a metadata relationship field on a type, you can relate it to another custom metadata type, an entity definition, a field definition, or an entity particle.

• Custom Metadata Relationship Considerations
  Before you start using custom metadata relationships, keep these considerations in mind.
• Create a Relationship to a Custom Metadata Type or Entity Definition
  Create direct relationships to a custom metadata type or entity definition.
• Create a Relationship to a Field Definition or Entity Particle
  Create direct relationships to field definitions or entity particles.
• View Filtering on Metadata Relationship Fields
  When you create a view and filter on a relationship field of a custom metadata type, use these guidelines for entering the filter values.