A frustration with TiddlyWiki's implementation of tagging is that when we
tag a bunch of tiddlers "introduction" or "mainmenu" there's no way of
stipulating the order in which those tiddlers should be displayed.
In TiddlyWiki5, we can easily transclude all the tiddlers with a particular
tag:
{{{ [tag[introduction]] |MyTemplate}}}
By default, the ordering is unpredictable (it's based on the order in which
the tiddlers were added to the internal store).
The common way to control the ordering are to prefix the titles of the
tagged tiddlers with a number and then sort the titles alphabetically:
{{{ [tag[introduction]sort[title]] |MyTemplate}}}
A slightly more sophisticated variant is to sort by a custom field eg
"ordering":
{{{ [tag[introduction]sort[ordering]] |MyTemplate}}}
To try to handle this better in TiddlyWiki5, I've added a new standard
field called "list" alongside tags, modified, modifier, title etc. The
"list" field contains a list of tiddler titles separated by spaces, using
double square brackets around titles containing spaces.
The new list field is currently used in three different places:
* the [list[title]] filter operator now retrieves its list of tiddler
titles from the "list" field of the specified tiddler (it used to read the
list as a newline delimited list from the text field)
* the [tag[title]] and [tagging[]] filter operators now sort their results
by the "list" field
Sorting by the list field means that any tiddlers that appear in the list
field maintain that ordering in the results. Titles that don't appear in
the list field appear at the end of the list in natural order.
You can see an example on http://five.tiddlywiki.com/:
1. Click on the "introduction" tag pill under the title of the HelloThere
tiddler to bring up the tag popup
2. Note how the listed tiddlers are ordered HelloThere, Acknowledgements,
Improvements, etc., with Contributing listed at the end
3. Click on the "introduction" link at the top of the tag popup
4. On the "introduction" tiddler, click the info icon, and then select the
"fields" tab
5. Observe how the "list" field specifies the tiddler titles in the same
order as the dropdown, except that Contributing is not listed, which is why
it appears at the end of the dropdown
The plan is to add a mechanism for drag and drop reordering of tiddler
lists. That will enable us to have drag and drop re-ordering of the "open"
tab in the sidebar as well as tag listings.
I'm also interested in using tiddler lists to model more complex data
structures. For example, a grid could be structured as a list of rows that
is each a list of cells.
For those interested in the code, the commit that added the "list" field
was this one:
https://github.com/Jermolene/TiddlyWiki5/commit/be1b16e2600fb56d143a736ab0ae219c243ff45e
Then this commit adds the new sorting behaviour to the "tag" and "tagging"
filters:
https://github.com/Jermolene/TiddlyWiki5/commit/a9a2ae2223c2e25e2f45f03b0c681d0f3f7ba11c
I'm quite excited about this change. It's a modest extension of TiddlyWikis
core data model that is useful in its own right as well as bringing a new
dimension to tagging.
Anyhow, it's all fairly mindbending stuff. Do bear in mind that all of this
is optional; you can carry on using tags as you always have, and ignore the
list field, if you want. I'd welcome any questions or comments,
Best wishes
Jeremy
--
Jeremy Ruston
mailto:[email protected]
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