{{Infobox software , name = TreeLine , logo = , screenshot = , caption = , developer = , released = 2001 , latest_release_version = 3.1.6 , latest_release_date = June, 2023 , latest_preview_version = , latest_preview_date = , platform =

Linux Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, pac ...

Windows Windows is a Product lining, product line of Proprietary software, proprietary graphical user interface, graphical operating systems developed and marketed by Microsoft. It is grouped into families and subfamilies that cater to particular sec ...

, programming_language =

Python Python may refer to: Snakes * Pythonidae, a family of nonvenomous snakes found in Africa, Asia, and Australia ** ''Python'' (genus), a genus of Pythonidae found in Africa and Asia * Python (mythology), a mythical serpent Computing * Python (prog ...

, language =

English English usually refers to: * English language * English people English may also refer to: Culture, language and peoples * ''English'', an adjective for something of, from, or related to England * ''English'', an Amish ter ...

French French may refer to: * Something of, from, or related to France ** French language, which originated in France ** French people, a nation and ethnic group ** French cuisine, cooking traditions and practices Arts and media * The French (band), ...

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

, genre = , license =

GNU General Public License The GNU General Public Licenses (GNU GPL or simply GPL) are a series of widely used free software licenses, or ''copyleft'' licenses, that guarantee end users the freedom to run, study, share, or modify the software. The GPL was the first ...

, website
treeline.bellz.org
TreeLine is a

free Free may refer to: Concept * Freedom, the ability to act or change without constraint or restriction * Emancipate, attaining civil and political rights or equality * Free (''gratis''), free of charge * Gratis versus libre, the difference betw ...

and simple

outliner An outliner (or outline processor) is a specialized type of text editor (word processor) used to create and edit Outline (list), outlines, which are text files which have a tree structure or a tree view, for organization. Textual information is co ...

with advanced data element definition and export abilities. It uses a basic

tree structure A tree structure, tree diagram, or tree model is a way of representing the hierarchical nature of a structure in a graphical form. It is named a "tree structure" because the classic representation resembles a tree, although the chart is gen ...

to organize information, and allows the user to define different types of nodes and leaves.

File formats

Export

TreeLine outlines can be exported as HTML, per-data type user defined formatting. In addition, it supports exporting outlines as an OpenDocument ODT file,

OPML OPML (Outline Processor Markup Language) is an XML format for outlines (defined as "a tree, where each node contains a set of named attributes with string values"). Originally developed by UserLand Software as a native file format for the outli ...

, various delimited text file formats, and as "plain" XML.

Import

TreeLine can open "plain" XML files, displaying the contents as an outline. It can import browser bookmarks.

File format

TreeLine uses a simple XML syntax to store data, with a ''.trl'' extension.

Similar programs

* Zim * Wixi * KeepNote * KJots *

Tomboy A tomboy is a girl or young woman who generally expresses masculine traits. Such traits may include wearing androgynous or unfeminine clothing and engaging in activities and behaviors traditionally associated with boys or men. Origins The w ...

* Notecase * Gnudiary *

GNote Gnote is a free and open-source desktop note-taking application written for Linux, cloned by Hubert Figuière from Tomboy. It uses a Wiki-like linking system to connect notes together. Gnote is part of the GNOME desktop environment, often fillin ...

* Tiddlywiki

External links

Official website
Outliners 2001 software