Documentation for JIRA 4.0. Documentation for other versions of JIRA is available too. 
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一般にサブタスク課題は、複数のタスクを割当て、個別にトラッキングできるよう、元の課題を分割しておきます。
Sub-tasks have all the same fields as standard issues, although note that their 'issue type' must be one of the sub-task issue types (see below) rather than one of the standard issue types.
Once you have enabled sub-tasks and defined at least one sub-task issue type, users will be able to:
On this page:
Sub-tasks are disabled by default. To enable sub-tasks:
Sub-tasks must be assigned one of the sub-task issue types, which are different to standard issue types. Please note that you must define at least one sub-task issue type before users can create sub-tasks.
Sub-task issue types can be customised on the 'Sub-Tasks' administration screen (which is described above). The 'Sub-Tasks' administration screen allows you to create, delete, edit, translate and choose icons for your sub-task issue types. For details, please see ' Defining Issue Types '.
It is possible to restrict the progression of an issue through workflow depending on the state of the issue's sub-tasks. For example, you might need to restrict an issue from being resolved until all of its sub-tasks are resolved. To achieve this, you would create a custom workflow and use the Sub-Task Blocking Condition on the workflow transitions that are to be restricted by the sub-tasks' state.
You can choose which subtask fields are displayed in the 'Sub-Tasks' section of an issue (see Working with sub-tasks '), i.e.:
This is done via the jira-application.properties file.
Sub-tasks are disabled from the sub-task administration screen. To disable sub-tasks please follow the following steps:
注意
Sub-tasks cannot be disabled if one or more sub-tasks exist in the system. You will need to remove the existing sub-tasks (or convert them to standard issues) before disabling this feature.