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An outliner is a computer program that allows text to be organized into discrete sections that are related in a tree structure or hierarchy. Text may be ''collapsed'' into a node, or expanded and edited. Outliners are typically used for computer programming, collecting or organizing ideas, as personal information management or for project management. Mind mappers and wikis are related types of software. == Design == The principal attribute of outline editors is that they support or enforce the use of a hierarchy of their items. * Editing: Sound parent-child relationships are enforced when the user modifies the document structure. For example: * * Promoting, demoting, copying, or deleting a parent has the same effect on the children. * * Every item entry must be within one level of its predecessor, such that each item must be a sibling or child of the preceding item (thus, no item can be a grandchild of the preceding item). * Viewing: The tool enables the user to affect the display by level. For example: * * Applying styles by outline level (e.g., bold all 1st level items) * * Displaying selected levels (e.g., show all 1st and 2nd level items, but none deeper). * * Hoisting an item hides all parent and sibling items; thereby focusing, or zooming in, on a particular branch. De-hoisting again reveals the full outline. * Search/Filter: The tool displays only items that contain the query terms plus their ancestors (parent, grandparent...) to give them context. * File import and export: Both the content and structure of outlines are conveyed when files are imported or exported (e.g., from and to tab-indented files). * Fields/Columns: Items can also have additional fields of information. This data can be shown as columns of data in the outline or as fields in the second pane (see 'Layout' below). Some outliners also allow the user to create custom fields and/or filter on fields. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Outliner」の詳細全文を読む スポンサード リンク
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