missing Find symbol/engines/"output web apps" list about find

[4www]

Some examples

• https://en.wikipedia.org/wiki/Tag_URI_scheme
• matrix-org/matrix-spec-proposals#2312
  matrix also uses prefix symbol similar to find to represent rooms(id,alias), users, events:

The following classes MUST be supported:
User IDs (@user:example.org)
Room IDs (!roomid:example.org)
Room aliases (#roomalias:example.org)
Event IDs ($eventid:example.org)

• view-source: from mobile browsers polyfill; see possibilities with https://eruda.liriliri.io/
• magnet: links protocol (to do something by default? browsers already request for selecting an application for this scheme, but could think about "registering a protocol handler")
• magnet link utilities (to .torrent, decrypt etc.)
• data:<mediatype>[;base64],<data> as a protocol/symbol, and not a set of + do actions
• and other URI/protocol/scheme that one might copy/paste to a URL or want to "transform into an other URL/protocol" https://en.wikipedia.org/wiki/List_of_URI_schemes
• also would be nice to be able to even "list links" that can "resolve to something in a browser", for applications like dns:[//<host>[:<port>]/]<dnsname>[?<dnsquery>]
• dns://radio4000.com/A/ -> dns://radio4000.com/A/ (not rendered in github markdown, but would be in html)

dig radio4000.com A
;; [...]
;; QUESTION SECTION:
;radio4000.com.			IN	A

;; ANSWER SECTION:
radio4000.com.		284	IN	A	172.67.199.111
radio4000.com.		284	IN	A	104.21.76.187
[...]