Stephan
{tiddlername} in filters or {{tiddlername}} in wiki text are not variables,
they are transclusions. We use <variablename> in filters and
<<variablename>> in wiki text
If you choose to use transclusions the thing you are transcluding needs to
contain the value you want used.
Given Erics guidance the simple form is
[search[Mark]] -[search[Temple]]
Search defaults to tags, text and title if *field list*: is blank
So If I read your example $:/temp/possearch should contain "Mark" and
$:/temp/negsearch
should contain "Temple".
Then the filter
[search{$:/temp/possearch}] -[search{$:/temp/negsearch}]
should work.,
You could use the edit-text widget to let users enter the value, or even a
select widget if you already can search for and identify possible values.
Another way to do this is use variables created from transclusions
\define posssearch() {{$:/temp/possearch}}
\define negsearch() {{$:/temp/negsearch}}}
then use the filter
[search<possearch>] -[search<negsearch>]
Regards
Tony
On Friday, December 13, 2019 at 6:01:16 AM UTC+11, Stephen Kimmel wrote:
>
> I want to combine a pair of search operators within a single filter where
> one will be positive and the other negative. For example, I might want a
> list of all the tiddlers that contain the word "Mark" but exclude all the
> tiddlers that contain the word "temple." The solution I suspect would
> involve an expression that looks something like
>
> [search[Mark]!search[Temple]]
>
> but, of course, I want to use variables in the expression. So what I have
> at the moment has an expression that looks like this:
>
> search{$:/temp/possearch}!search{$:/temp/negsearch}
>
> The problem I'm having occurs when $:/temp/negsearch is either empty or
> doesn't exist. In that set of circumstances, I get no matches. I would like
> the search to act as though it were
>
> search{$:/temp/possearch}
>
> or
>
> search{$:/temp/possearch}!search[xyz123]
>
> but I can't figure out how to do that.
>
> Any ideas?
>
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