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43 lines
3.2 KiB
Markdown
# Notes
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Note is a central entity in Trilium. Main attributes of note are title and content.
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### Note types
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* [text note](../Note%20Types/Text.md) - this is default note type which allows you to put rich text, images etc.
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* [code note](../Note%20Types/Code.md) - some kind of formal code, typically programming language (e.g. JavaScript) or data structure (e.g. JSON)
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* [image note](https://github.com/TriliumNext/Notes/wiki/Images) - represents single image
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* file note - represents uploaded file (e.g. docx MS Word document).
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* render HTML note - this works as an output screen of attached [scripts](../Note%20Types/Code/Scripts.md)
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* [saved search](../Note%20Types/Saved%20Search.md) note - contains saved search query and dynamically displays result of the search as its sub-notes
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* [relation map](../Note%20Types/Relation%20Map.md) note - visualizes notes and their relations
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* [book note](../Note%20Types/Book.md) - displays its children notes, useful for reading many short notes
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* mermaid - create diagrams and flowcharts using [mermaid.js ↗](https://github.com/mermaid-js/mermaid)
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* [canvas note](#root/fKYGY3OOo5d1) - allows hand drawn notes and basic diagraming on an infinite canvas using [excalidraw ↗](https://github.com/excalidraw/excalidraw)
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In Trilium there's no specific "folder" note type. Any note can have children and thus be a folder.
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### Root note
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There's one special note called "root note" which is root of the note tree. All other notes are placed below it in the structure.
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### Tree structure
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Importantly, note itself doesn't carry information on its placement in note tree. See [cloning](Notes/Cloning%20Notes.md) for details.
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Tree structure of notes can resemble file system - but compared to that notes in Trilium can act as both file and directory - meaning that note can both have its own content and have children. "Leaf note" is a note which doesn't have any children.
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### Deleting / undeleting notes
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When you delete a note in Trilium, it is actually only marked for deletion (soft-delete) - the actual content, title, attributes etc. are not deleted, only hidden.
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Within (by default) 7 days, it is possible to undelete these soft-deleted notes - open Recent Changes dialog, and you will see a list of all modified notes including the deleted ones. Notes available for undeletion have a link to do so. This is kind of "trash can" functionality known from e.g. Windows.
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Clicking an undelete will recover the note, it's content and attributes - note should be just as before being deleted. This action will also undelete note's children which have been deleted in the same action.
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To be able to undelete a note, it is necessary that deleted note's parent must be undeleted (otherwise there's no place where we can undelete it to). This might become a problem when you delete more notes in succession - the solution is then undelete in the reverse order of your deletion.
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After the 7 days (configurable) the notes will be "erased" - their title, content, revisions and attributes will be erased, and it will not be possible anymore to recover them (unless you restore [backup](../Installation%20%26%20Setup/Backup.md)).
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## See also
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* [Read-only note](Notes/Read-Only%20Notes.md) |