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TiddlyWiki Community Wiki

[edit] TiddlyWiki as a Database

To appreciate the power and versatility of TiddlyWiki, it is helpful to understand TiddlyWiki as a versatile relational database, with a JavaScript engine, and a data warehouse within which each tiddler is a data record with a set of fields. Fields may be generated by the TiddlyWiki core engine, by plugins or by other means.

[edit] Default Fields

• Title: unique title of the tiddler
• Modifier: author/editor (corresponds to the current username)
• Modified: last-modified date/time (12-digit number with the format YYYY0MM0DD0hh0mm)
• Created: date/time the tiddler was created (12-digit number with the format YYYY0MM0DD0hh0mm)
• Tags: a set of space-separated keywords (tags), enclosed in square brackets ([[...]] if the tag contains a space
• Tiddler Body: contains textual content

The title field is a tiddler's unique identifier, so there cannot be two tiddlers with identical titles.

[edit] Additional Core Fields

There are additional fields that are or can be generated by the Tiddler

• changecount

The first time you edit and save an existing tiddler, a changecount field is created, with an initial value of 1

Each subsequent time you edit the tiddler, the value of changecount is increased by 1

• Server Fields

When you import tiddlers with the built-in ImportTiddlers function and you leave the Checkbox for:

"Keep these tiddlers linked to this server so that you can synchronise subsequent changes"

selected, the following server fields will be added to the imported tiddlers:

• doNotSave

used for temporary tiddlers which are not persistent (not saved to file)

[edit] Storage of Tiddler Fields

Within TiddlyWiki's store area, each tiddler is recorded in the following format:

<div title="Tiddler Title" modifier="Author/Editor" modified="YYYY0MM0DD0hh0mm" created="YYYY0MM0DD0hh0mm" tags="foo bar [[lorem  ipsum]]">
<pre>Body of the tiddler<\/pre>
</div>

[edit] Extended Fields

In addition to the TiddlyWiki core fields, it is possible to add extended fields.