JSONPath

External

• https://goessner.net/articles/JsonPath/
• https://github.com/json-path/JsonPath
• https://support.smartbear.com/alertsite/docs/monitors/api/endpoint/jsonpath.html
• https://github.com/jayway/JsonPath

Internal

• JSON
• kubectl get JSONPath Support

Overview

JSONPath is a query language for JSON similar to XPath for XML. Some documentation describes it as a Java DSL for reading JSON documents, probably to address those cases where the implementation is made in Java.

Concepts

JSONPath Expression

A JSONPath expression specifies a path to an element or a set of elements that are part of a JSON document. An expression can be assembled using a series of syntax elements presented below.

$

$ represents the top-level element (or root) of the JSON document. The "$" is optional, the following are equivalent:

$.metadata
.metadata
metadata
<syntaxhighlight lang='json'>

There are two ways to select a specific child element relative to the parent element: [[#.property|.''property'']] and [[#.5B0-based-index.5D|[''0-based-index'']]]. These two different syntaxes are applied to JSON [[JSON_Concepts#Objects|Objects]] and [[JSON_Concepts#Arrays|Arrays]], given the fact that JSON has only these two types of collections.

====<tt>.''property''</tt>====
This is called "the dot notation" where a property of the parent JSON [[JSON_Concepts#Objects|Object]] is specified following a dot.
<syntaxhighlight lang='json'>
.metadata.resourceVersion