Are indirect filters possible?

[Benedikt Aufermann]

Is there a possibility to filter over the result of a filter?
In the current case I have the folling issue:
- There are tiddlers taged as "Person" and tages with there Company 
- The Companys Tiddlers are taged as "Company"
Now I need a list of all persons that are not taged by a company. In other word: Not taged by any tag that is itself taged as company.

Something like 

-- tag[Person]!tag[tag[Company]] 

instead of manual on non dynamic 

-- tag[Person]!tag[Company1]!tag[Company2]!tag[Company3]!tag[Company4]...

Benedikt

[Ray Vermey]

Hi Benedict

I think this is what you are looking for? https://tiddlywiki.com/static/Introduction%2520to%2520filter%2520notation.html

Ray

Op ma 8 mrt. 2021 om 01:56 schreef Benedikt Aufermann <benedikt....@web.de>:

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[dieg...@gmail.com]

Bemedikt,

If I'm understanding you correctly, this should work:

[tag[Person]] -[tag[Company]tagging[]]

If all your people are tagged with Person, and call Companies are tagged with Company, then:

• The first filter run generates a list of all people
• The second filter run generates a list of all people who are tagged with the tiddlers that are tagged Company.
• They are then "subtracted" or set-differenced from each other.

I tested this on tiddlywiki.com by making the following test tiddlers:

• Person A - tagged with Microsoft and Person
  
• Person B - tagged with Microsoft and Person
• Person C - tagged with Dell and Person
• Person D - no company tag but Person
• Microsoft - tagged with Company
• Dell - tagged with Company
• IBM - tagged with Company

If I've understood you, you want to get Person D.

The first filter run generates as list of PersonA, PersonB, PersonC, and PersonD. The second one generetes PersonA, PersonB, and PersonC. They are substracted to give you PersonD.

Diego

[Benedikt Aufermann]

Hi Diego,

thank you, that works!

Benedikt