Hi Tobias
>
> What exactly is *{$:/palette}*...
>
> [{$:/palette}indexes[]sort[title]]
>
> interpreted as?
>
The curly braces indicate a transcluded filter operand. The overall action
is to take the tiddler title stored in `$:/palette`, get all the indices of
the data properties within it, and then sort the indices.
>
> What would happen with a construct like this:
>
> [[tag[foo]indexes[]sort[title]]
>
> ...assuming there were multiple data tiddlers tagged *foo*?
>
It would take all tiddlers tagged "foo", and accumulate all the indices
within them, and then sort the list of indices.
> Also, can any field of a tiddler be used as a DataField or does it always
> have to be the *text* field?
>
No, the data comprising a data tiddler is always stored in the "text" field.
> As asked / indicated here
> <https://groups.google.com/d/msg/tiddlywiki/Yv7kdCbWtNo/crA7E7xWHSsJ>, I
> think it can prove beneficial to store related data entries at the exact
> tiddler to which they relate, yet not in its text-field.
>
I'm not so convinced. If we store state within content tiddlers then it
makes it harder to share those content tiddlers in a multi-user scenario.
Best wishes
Jeremy.
> As for deleting indexes from a DataTiddler, here is one way to do it...
>
> Saving And Loading A History Snapshot @ tb5
> <http://tb5.tiddlyspot.com/#Saving%20And%20Loading%20A%20History%20Snapshot>
>
> Look at *\define deleteSnapshot()* and notice how the index is *set* on
> button click, however with no *setTo* value being specified. This results
> in setting an undefined value, ergo deleting the index from the data.
>
> Best wishes, Tobias.
>
--
Jeremy Ruston
mailto:[email protected]
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