---
title: identifier
framework: tvmljs
role: symbol
role_heading: Instance Property
path: tvmljs/dataitem/2897829-identifier
---

# identifier

A unique identifier for a data item provided by the associated JSON object.

## Declaration

```data
readonly attribute String identifier;
```

## Discussion

Discussion The identifier property is mapped to the itemID attribute when the data item is converted to a DOM element. The underlying JSON objects being mapped must have a unique identifier for all JSON objects grouped under the same type.

## See Also

### Retrieving Data Item Information

- [type](tvmljs/dataitem/2897825-type.md)