> ## Documentation Index
> Fetch the complete documentation index at: https://moengage-docs-limits-data.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# What Are the Key Points of the MoEngage Data Tracking Policy?

> Review the MoEngage data tracking policy covering supported data types, attribute limits, naming conventions, and event tracking rules for your setup.

This article explains the key points of the MoEngage data tracking policy. These policies help you make the necessary adjustments during the initial implementation stages.

## Instructions

1. MoEngage accepts the following datatypes for attributes:
   * Integer, Float, Double, Long, Boolean, String, Datetime, Array`<Long>`, Array`<Int>`, Array`<Double>`, Array`<Short>`, Array`<Float>`, Array`<String>`, Object, Array of Objects.
2. Each array element can be a maximum of 512 characters, with up to 50 elements in each array.
3. Attribute values sent as dictionary data types will be rejected.
4. For attributes of the datetime data type,
   * When sending data through MoEngage Data APIs, use the ISO 8601 date format (for example, 2020-05-31T16:33:35Z).
   * When sending data through SDK, use the SDK's date functions.
5. If an attribute value is a URL and exceeds the 512-character limit, it will be rejected to prevent issues with image and URL personalization.
6. Arrays must be homogeneous (all values in an array must be of the same datatype). Data typecasting is supported at the array level.
7. Event names used with periods create an additional space. For example, *event.name* will be ingested as *event. Name* (with a space). It is recommended to use “\_" (hyphens) instead of "." (period).
8. You can create up to 100 unique event attributes for a single event.
9. The following table lists the limit values for events and attribute names:

   | Key                          | Character Limit | Limit Breach Handling                |
   | ---------------------------- | --------------- | ------------------------------------ |
   | Event name length            | 200             | Store the first 200 characters only. |
   | User attribute name length   | 200             | Store the first 200 characters only. |
   | User attribute value length  | 512             | Store the first 512 characters only. |
   | Event attribute name length  | 200             | Store the first 200 characters only. |
   | Event attribute value length | 512             | Store the first 512 characters only. |

For more information, read [Data Tracking Policies](/user-guide/data/key-concepts/data-tracking-policies).