> ## Documentation Index
> Fetch the complete documentation index at: https://help.airbridge.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Event Taxonomy Limitations
## Category, Action, Label, Value
* Data Type: If the data type does not match the designated format, the event itself is not stored.
* Max Length: Anything that exceeds the designated maximum length is cut short to fit the maximum length.
## Semantic Event Properties (Semantic Attributes)
* Data Type: If a "semantic attribute" (e.g. `transactionID`, `totalValue`) does not match the designated format, the event itself is not stored. **However, if individual data fields of "Semantic Event Properties" (e.g.** **`products.productID`,** **`products.name`) do not match the designated type, the event is stored excluding the problematic field.**
* Max Length: There are no length limitations for "semantic attributes". **However, the value of "semantic attributes" are cut short if the length exceeds its limitations.**
## Custom Event Properties (Custom Attributes)
* Data Type: If the data type does not match the designated format, the event itself is not stored.
* Max Length: If the length exceeds the designated maximum length, the value is stored as **`ERROR_MAX_LENGTH_EXCEEDED`**.
## Type and Max Length for Each Event Data Field
| Field Name | Child Field Name | Field Key | Type | Max Length |
| ------------------------- | ---------------------------------- | ------------------------------- | ------- | ------------ |
| Category | - | category | string | 128 |
| Action | - | action | string | 128 |
| Label | - | label | string | 128 |
| Value | - | value | float | 64 bit float |
| Custom Event Properties | - | customAttributes | map | 2048 |
| Semantic Event Properties | - | semanticAttributes | map | - |
| Semantic Event Properties | Currency | currency | string | 1024 |
| Semantic Event Properties | Product List ID | productListID | string | 1024 |
| Semantic Event Properties | Cart ID | cartID | string | 1024 |
| Semantic Event Properties | Transaction ID | transactionID | string | 1024 |
| Semantic Event Properties | Transaction Type | transactionType | string | 1024 |
| Semantic Event Properties | Transaction Paired Event Category | transactionPairedEvenCategory | string | 1024 |
| Semantic Event Properties | Search Query | query | string | 1024 |
| Semantic Event Properties | Wish List ID | wishListID | string | 1024 |
| Semantic Event Properties | Content ID | contentID | string | 1024 |
| Semantic Event Properties | Content Name | contentName | string | 1024 |
| Semantic Event Properties | Level | level | string | 1024 |
| Semantic Event Properties | In App Purchased | inAppPurchased | boolean | - |
| Semantic Event Properties | Total Revenue | totalValue | float | 64 bit float |
| Semantic Event Properties | Rating Value | ratingValue | float | 64 bit float |
| Semantic Event Properties | Max Rating Value | maxRatingValue | float | 64 bit float |
| Semantic Event Properties | Score | score | float | 64 bit float |
| Semantic Event Properties | Transaction Paired Event Timestamp | transactionPairedEventTimestamp | int | 64 bit float |
| Semantic Event Properties | Total Quantity | totalQuantity | int | 64 bit float |
| Semantic Event Properties | Product List | products | arrray | - |
| Semantic Event Properties | Product ID | products\[0].productID | string | 1024 |
| Semantic Event Properties | Product Name | products\[0].name | string | 1024 |
| Semantic Event Properties | Product Price | products\[0].price | float | 64 bit float |
| Semantic Event Properties | Product Quantity | products\[0].quantity | int | 64 bit float |
| Semantic Event Properties | Product Currency | products\[0].currency | string | 1024 |
| Semantic Event Properties | Product Position | products\[0].position | int | 64 bit float |