# View the profile schema



You can view and modify the profile schema from the **Admin console** or through the  [Profile schema API](https://www.krenalis.com/docs/api/profile-schema.md). In the Admin console, select **Profile schema** from the left-hand navigation menu to access the schema for the current workspace.

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    <ol class="screenshot-callout__list">
      <li><strong>Expand/Collapse all:</strong> Expand or collapse all schema properties at once.</li>
      <li><strong>Alter schema:</strong> Modify the profile schema. You can update names, types, descriptions, and the overall structure as needed.</li>
      <li><strong>Name:</strong> The name of each property in the schema. This is the identifier used throughout Krenalis to reference that property.</li>
      <li><strong>Type:</strong> The data type of the property — for example, string, int, date, object, or array. The type defines how the data is stored, validated, and interpreted.</li>
      <li><strong>Primary source:</strong> The authoritative source for this property. Once it populates a value, that value will not be overwritten by other sources.</li>
      <li><strong>Expandable property:</strong> An object property that can be expanded to reveal its nested sub-properties.</li>
      <li><strong>Sub-properties:</strong> The nested properties inside an object property, where the actual user values are stored.</li>
    </ol>
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    [Profile schema](/docs/profile\-unification/schema/images/profile\-schema\.png)!
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# Data types

The table below provides an overview of all data types supported by Krenalis that can be used when defining properties in the profile schema.

| Krenalis&nbsp;type | Description                                                                                                                                                                                                           |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `string`           | String encoded in UTF-8. Can be limited by maximum length in bytes and characters.                                                                                                                                    |
| `boolean`          | Boolean value representing true or false.                                                                                                                                                                             |
| `int(n)`           | Integer. n is the number of bits used to store the value and determines the valid range. Allowed values: 8, 16, 24, 32, or 64.                                                                                        |
| `float(n)`         | Floating-point number. n is the precision (32 or 64). Can be restricted to real numeric values only (excluding infinite and NaN).                                                                                     |
| `decimal(p,s)`     | Decimal number with controlled precision. p is the total number of digits and s is the number of digits after the decimal point. Suitable for values requiring exact digits. p ranges from 1 to 38 and s from 0 to p. |
| `datetime`         | Date and time with nanosecond precision in UTC. Valid year range: 1 to 9999.                                                                                                                                          |
| `date`             | Date only. Valid year range: 1 to 9999.                                                                                                                                                                               |
| `time`             | Time only with nanosecond precision and no timezone.                                                                                                                                                                  |
| `year`             | Year value from 1 to 9999.                                                                                                                                                                                            |
| `uuid`             | Universally unique identifier (UUID).                                                                                                                                                                                 |
| `json`             | JSON value.                                                                                                                                                                                                           |
| `ip`               | IPv4 or IPv6 address.                                                                                                                                                                                                 |
| `array`            | List of values of the same type.                                                                                                                                                                                      |
| `object`           | Object with well-defined properties, each with a name and a declared type.                                                                                                                                            |
| `map`              | Set of key–value pairs, where the key is string and the values have the same type.                                                                                                                                    |