Relationship Attributes – singular / plural

singular / plural

Relationships between concepts are either singular or plural

Singular relationships will only consider one relationship instance of an object, normally the most likely result, when running a query. Plural relationships allow Rainbird to create and consider multiple relationship instances of an object and deliver multiple answers to a query. By default, a relationship is singular, but it is important to set this attribute according to the requirements of a relationship. In both cases, the Certainty factor for the result must be above the minimum certainty factor (if using).

The singular/plural attribute can be set when creating a new relationship, or when editing an existing relationship, by switching the plural slider in the relationship settings screen on or off.

Figure 1: Changing the singular/plural attribute

 For example, if a knowledge map was built to determine what language a person might speak, Rainbird might use the country a person is born in to work out the answer. The relationship between the concepts “Person” and “Country”, “born in”, would be singular as a person can only be born in one country:

Figure 2: A singular relationship, ‘born in’

However, a person might be able to speak multiple languages, so the relationship between the concept “Person” and “Language”, “speaks language’, would be plural:

Figure 3: A plural relationship, ‘speaks language’

Click on the ‘Export.rbird’ button to download the ‘Singular/Plural’ map used in this example. The knowledge map can then be imported into your Rainbird Studio.

Query & Results 

You will need to run a query on the relationship ‘speaks language’ for an example of a query that uses both singular and plural relationships.


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Version 1.01 – Last Update: 16/02/2021