# NamespaceRuleBasedPropertiesProperty

The rule-based properties of an ID namespace.

These properties define how the ID namespace can be used in an ID mapping workflow.

- Source: Generated code
- Type last changed: v2.154.0 · 22 Aug 2024

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_entityresolution as entityresolution } from 'aws-cdk-lib';
const namespaceRuleBasedPropertiesProperty: entityresolution.CfnIdNamespace.NamespaceRuleBasedPropertiesProperty = {
  attributeMatchingModel: 'attributeMatchingModel',
  recordMatchingModels: ['recordMatchingModels'],
  ruleDefinitionTypes: ['ruleDefinitionTypes'],
  rules: [{
    matchingKeys: ['matchingKeys'],
    ruleName: 'ruleName',
  }],
};
```

## Properties

- `attributeMatchingModel`: string — The comparison type. You can either choose `ONE_TO_ONE` or `MANY_TO_MANY` as the `attributeMatchingModel` .

  If you choose `ONE_TO_ONE` , the system can only match attributes if the sub-types are an exact match. For example, for the `Email` attribute type, the system will only consider it a match if the value of the `Email` field of Profile A matches the value of the `Email` field of Profile B.

  If you choose `MANY_TO_MANY` , the system can match attributes across the sub-types of an attribute type. For example, if the value of the `Email` field of Profile A matches the value of `BusinessEmail` field of Profile B, the two profiles are matched on the `Email` attribute type.

- `recordMatchingModels`: string[] — The type of matching record that is allowed to be used in an ID mapping workflow.

  If the value is set to `ONE_SOURCE_TO_ONE_TARGET` , only one record in the source is matched to one record in the target.

  If the value is set to `MANY_SOURCE_TO_ONE_TARGET` , all matching records in the source are matched to one record in the target.

- `ruleDefinitionTypes`: string[] — The sets of rules you can use in an ID mapping workflow.

  The limitations specified for the source and target must be compatible.

- `rules`: [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [IResolvable](/cdk/api/v2/docs/aws-cdk-lib.IResolvable.html) | [CfnIdNamespace.RuleProperty](/cdk/api/v2/docs/aws-cdk-lib.aws_entityresolution.CfnIdNamespace.RuleProperty.html)[] — The rules for the ID namespace.