diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -337,21 +337,25 @@ The name of the data model (table name) is defined by the key that refers to thi
The Field Objects describes one field (column, property, nested field) of a data model.
-| Field | Type | Description |
-|----------------|--------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| description | `string` | An optional string describing the semantic of the data in this field. |
-| type | [Data Type](#data-types) | The logical data type of the field. |
-| required | `boolean` | An indication, if this field must contain a value and may not be null. Default: `false` |
-| unique | `boolean` | An indication, if the value must be unique within the model. Default: `false` |
-| format | `string` | `email`: A value must be complaint to [RFC 5321, section 4.1.2](https://www.rfc-editor.org/info/rfc5321).
`uri`: A value must be complaint to [RFC 3986](https://www.rfc-editor.org/info/rfc3986).
`uuid`: A value must be complaint to [RFC 4122](https://www.rfc-editor.org/info/rfc4122). Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
-| minLength | `number` | A value must greater than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
-| maxLength | `number` | A value must less than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
-| pattern | `string` | A value must be valid according to the [ECMA-262](https://262.ecma-international.org/5.1/) regular expression dialect. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
-| example | `string` | An example value. |
-| pii | `boolean` | An indication, if this field contains Personal Identifiable Information (PII). |
-| classification | `string` | The data class defining the sensitivity level for this field, according to the organization's classification scheme. Examples may be: `sensitive`, `restricted`, `internal`, `public`. |
-| tags | Array of `string` | Custom metadata to provide additional context. |
-| $ref | `string` | A reference URI to a definition in the specification, internally or externally. Properties will be inherited from the definition. |
+| Field | Type | Description |
+|------------------|--------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| description | `string` | An optional string describing the semantic of the data in this field. |
+| type | [Data Type](#data-types) | The logical data type of the field. |
+| required | `boolean` | An indication, if this field must contain a value and may not be null. Default: `false` |
+| unique | `boolean` | An indication, if the value must be unique within the model. Default: `false` |
+| format | `string` | `email`: A value must be complaint to [RFC 5321, section 4.1.2](https://www.rfc-editor.org/info/rfc5321).
`uri`: A value must be complaint to [RFC 3986](https://www.rfc-editor.org/info/rfc3986).
`uuid`: A value must be complaint to [RFC 4122](https://www.rfc-editor.org/info/rfc4122). Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
+| minLength | `number` | A value must greater than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
+| maxLength | `number` | A value must less than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
+| pattern | `string` | A value must be valid according to the [ECMA-262](https://262.ecma-international.org/5.1/) regular expression dialect. Only evaluated if the value is not null. Only applies to unicode character sequences types (`string`, `text`, `varchar`). |
+| minimum | `number` | A value of a number must greater than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to numeric values. |
+| exclusiveMinimum | `number` | A value of a number must greater than the value of this. Only evaluated if the value is not null. Only applies to numeric values. |
+| maximum | `number` | A value of a number must less than, or equal to, the value of this. Only evaluated if the value is not null. Only applies to numeric values. |
+| exclusiveMaximum | `number` | A value of a number must less than the value of this. Only evaluated if the value is not null. Only applies to numeric values. |
+| example | `string` | An example value. |
+| pii | `boolean` | An indication, if this field contains Personal Identifiable Information (PII). |
+| classification | `string` | The data class defining the sensitivity level for this field, according to the organization's classification scheme. Examples may be: `sensitive`, `restricted`, `internal`, `public`. |
+| tags | Array of `string` | Custom metadata to provide additional context. |
+| $ref | `string` | A reference URI to a definition in the specification, internally or externally. Properties will be inherited from the definition. |
### Definition Object