Structure adds structure() JQL function that lets you search for issues that are added to a structure, with the possibility to add constraints on their relationships in the hierarchy. The language used to define the constraints is called Structured JQL or S-JQL.
To quickly find a solution to a common structure querying problem, consult S-JQL Cookbook, which contains a number of examples. To build your own query, start off with the closest example and modify the query as needed. Consult S-JQL Reference for a comprehensive description of the language and structure() JQL function.
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