# tExtractJSONFields Storm properties (deprecated) Availability-note[Deprecated](https://help.talend.com/r/en-US/Cloud/labels-on-talend-help-center/availability-deprecated) This content is deprecated. These properties are used to configure tExtractJSONFields running in the Storm Job framework. The Storm tExtractJSONFields component belongs to the Processing family. This component is available in Talend Real Time Big Data Platform and Talend Data Fabric. Availability-note[Deprecated](https://help.talend.com/r/en-US/Cloud/labels-on-talend-help-center/availability-deprecated) This content is deprecated. The Storm framework is deprecated from Talend 7.1 onwards. Use Talend Jobs for Apache Spark Streaming to accomplish your Streaming related tasks. ## Basic settings | Property type | Either Built-In or Repository. | | --- | --- | | | Built-In: No property data stored centrally. | | | Repository: Select the repository file where the
properties are stored. | | Schema and Edit
Schema | A schema is a row description. It defines the number of fields
(columns) to be processed and passed on to the next component. When you create a Spark
Job, avoid the reserved word line when naming the
fields.

Click Edit
schema to make changes to the schema. If the current schema is of the Repository type, three options are available:

| | | Built-In: You create and store the schema locally for this component
only. | | | Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs. | | JSON field | List of the JSON fields to be extracted. | | Loop XPath query | Node within the JSON field, on which the loop is based. | | Mapping | Column: schema defined to hold
the data extracted from the JSON field.


XPath Query: XPath Query to specify
the node within the JSON field.


Get nodes: select this check box to
extract the JSON data of all the nodes specified in the XPath query list or select the check box
next to a specific node to extract its JSON data only.


Is Array: select this check box
when the JSON field to be extracted is an array instead of an
object. | ## Advanced settings | Encoding | Select the encoding from the list or select Custom
and define it manually. This field is compulsory for database data handling. The
supported encodings depend on the JVM that you are using. For more information, see
[https://docs.oracle.com](https://docs.oracle.com/). | | --- | --- | ## Usage | **Usage rule** | If you have subscribed to one of the
Talend
solutions with Big Data, you can also
use this component as a Storm component. In a
Talend
Storm Job, this component is used as
an intermediate step and other components used along with it must be Storm components, too.
They generate native Storm code that can be executed directly in a Storm system.

The Storm version does not support the use of the global variables.

You need to use the Storm Configuration tab in the
Run view to define the connection to a given Storm
system for the whole Job.

This connection is effective on a per-Job basis.

For further information about a
Talend
Storm Job, see the sections describing how to create and configure a

Talend
Storm Job of the **Talend Big Data Getting Started Guide**.

Note that in this documentation, unless otherwise explicitly stated, a scenario presents
only Standard Jobs, that is to say traditional
Talend
data
integration Jobs. | | --- | --- |