> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/7.19.1/concept-model/editing-mrcm/predicates.md).

# Predicates

### Cardinality predicate <a href="#editingmrcm-predicatecardinality" id="editingmrcm-predicatecardinality"></a>

This section allows the user to specify the cardinality of the predicates, and to set relationship group rules for the relationship predicates.

![Cardinality Predicate](https://3959073837-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRoMPum3fElXxzso90QiD%2Fuploads%2Fn97gzvoSVFyOEDqKtvqo%2Fmrcm_cardinality_predicate.png?alt=media\&token=0325ee50-eb20-492b-a43e-2665c7fe723e)

### Relationship predicate <a href="#editingmrcm-relationshippredicate" id="editingmrcm-relationshippredicate"></a>

Relationship predicates restrict the type of relationships that can be applied to a domain. The relationship predicate should always have an attribute and a range definition.

![Relationship Predicate](https://3959073837-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRoMPum3fElXxzso90QiD%2Fuploads%2FzF4KweBS0nG4OJQHXYFh%2Fmrcm_relationship_predicate.png?alt=media\&token=e2e1215c-9c8e-4277-85d0-498a18bb17f0)

The attribute type and range can be defined using the same type of concept set definitions as described above.

![Options for Defining the Attribute Type](https://3959073837-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRoMPum3fElXxzso90QiD%2Fuploads%2F5bp9IHddoBkX1ihz9qg5%2Fmrcm_attribute_options.png?alt=media\&token=df3ce3e1-6159-41d5-b85e-a80ca5f8e04e)

### Description predicate <a href="#editingmrcm-descriptionpredicate" id="editingmrcm-descriptionpredicate"></a>

Description predicate allows the user to define the necessary or permitted description types a domain should have.

![Description Predicate](https://3959073837-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRoMPum3fElXxzso90QiD%2Fuploads%2FwM3nGoO9NtyQjz4NA2F1%2Fmrcm_description_predicate.png?alt=media\&token=bf5a535b-7cde-4615-8f70-713b7493fa60)